Dye Types and FR Treatment Compatibility: What Interior Designers Need to Know

Dye Types and FR Treatment Compatibility: What Interior Designers Need to Know

The hidden risk: Reactive dyes — used on many cotton, linen, and silk fabrics — can cause progressive fading in the months after FR treatment. The fading is not visible at installation. It develops slowly and cannot be reversed.
The safest dye class for FR-treated fabrics: Vat dyes on cellulosic fibres; acid dyes on protein fibres (wool, mohair, silk). Both form strong bonds resistant to the chemical conditions of FR treatment.
Fibres to approach with caution: Cotton and linen with reactive dyes; fabrics with unknown dye composition.
The practical rule: Always ask the supplier which dye class was used before sending a fabric for FR treatment.

Fire retardant treatment is a routine requirement for contract upholstery and curtains in commercial interiors. What is less widely understood is that the chemical process of FR treatment can interact with certain dye types and cause colour change — sometimes immediately after treatment, and sometimes months later when the problem is much harder to diagnose and impossible to reverse. This guide explains how different dye types are used on the fabrics most relevant to interior designers, which dye types carry the highest risk in FR treatment, and what to confirm with suppliers before committing to treatment.

For how back-coating and wet padding work in plain language, see our how FR treatment works guide. For the fire certification standards that require FR treatment, see our complete guide to BS 5852 Crib 5. For guidance on which fabrics and fibres can be FR treated, see our guide to FR treatment and fibre compatibility. For colour fastness testing, see our colour fastness and crocking guide.

How FR Treatment Works and Why Dyes Matter

The two main methods of applying FR treatment to upholstery and curtain fabrics are back-coating and wet padding. Understanding the difference is essential to understanding the dye interaction risk.

Back-coating applies a chemical compound — typically a phosphorus or halogenated compound suspended in a paste — to the reverse of the fabric. The coating sits on the back face and does not penetrate the face yarns where the dye is located. Provided the back-coating is applied correctly and the fabric is not saturated, back-coating has minimal interaction with the face dyes. The majority of Crib 5 treatments for upholstery fabrics use this method.

Wet padding applies FR chemicals in solution to the whole fabric by running it through a padder — rollers that squeeze the chemical solution into the structure of the cloth. The fabric is then dried and cured. This process is used primarily for curtain fabrics and some lighter upholstery weights. Because the chemical solution penetrates the entire fabric including the face yarns, it comes into direct contact with the dye molecules. This is where dye-FR interaction can occur.

The pH of the FR solution used in wet padding is mildly acidic for phosphorus-based compounds. Certain dye classes are sensitive to acidic conditions. When an acid-sensitive dye is exposed to the mildly acidic FR solution during padding, the bond between the dye molecule and the fibre can be weakened. The weakening may not cause immediate visible colour change. Instead, the dye becomes more susceptible to subsequent degradation by atmospheric pollutants — oxides of nitrogen and sulphur from the environment — which produce acids on the surface of the fabric after treatment. Fading develops progressively over weeks and months. It is not visible at installation and cannot be detected by standard pre-treatment testing.

The Main Dye Classes and Their FR Compatibility

Reactive dyes. The highest-risk dye class for FR treatment. Reactive dyes are used extensively on cellulosic fibres — cotton, linen, viscose — and occasionally on wool and silk blends. They produce bright, vivid colours with good light fastness and excellent wash fastness under normal conditions. The dye molecule forms a covalent chemical bond with the fibre during dyeing. However, this bond is sensitive to acid. The mildly acidic conditions of some FR padding treatments can initiate the breakdown of the dye-fibre bond, making the dye vulnerable to subsequent fading from atmospheric pollutants.

The fading problem with reactive dyes is well documented in the FR treatment industry. It does not affect all reactive dyes equally — different reactive dye variants have different acid sensitivity — but a significant proportion of fading problems encountered by FR treatment companies involve reactive dyes. The problem is compounded by its delayed onset: a fabric that passes visual inspection immediately after treatment may show noticeable fading within three to six months. By the time the fading is visible, installation is complete and remediation is not possible.

The practical advice from experienced FR treatment houses is: where possible, avoid specifying fabrics with reactive dyes for wet-padded FR treatment. If you cannot avoid it — because the fabric is specified and cannot be changed — request that the treatment provider tests a sample and stores it for three to six months before treating the full order. This does not guarantee the full order will behave identically, but it provides the best available advance warning of a fading risk.

Acid dyes. Used on protein fibres — wool, mohair, silk, and some nylon. Acid dyes form strong bonds with protein fibres and are not sensitive to the mildly acidic conditions of FR treatment in the way that reactive dyes are. Back-coated wool and mohair velvets treated for Crib 5 using phosphorus or halogenated back-coating compounds do not typically show dye interaction problems. Acid-dyed silk is more cautious territory because silk is a delicate protein fibre and any chemical exposure requires care, but acid dye instability is not the primary risk for silk in FR treatment.

Vat dyes. The most stable dye class available and the least susceptible to FR treatment interaction. Vat dyes are used on cellulosic fibres — cotton and linen primarily — and produce colours with exceptional light fastness and wash fastness. The dye molecule is insoluble and is locked within the fibre structure rather than bonded chemically at the surface in the same way reactive dyes are. Vat dyes do not react with the acidic conditions of FR treatment and do not show the progressive fading associated with reactive dyes after treatment. Cotton and linen fabrics dyed with vat dyes are among the most FR-treatment-compatible cellulosic fabrics available. The limitation of vat dyes is a smaller colour range and higher dyeing cost compared to reactive dyes, which is why many fabric producers use reactive dyes as their default.

Disperse dyes. Used on polyester and acetate. Disperse dyes are forced into synthetic fibres under high heat and pressure. They are virtually insoluble in water and chemically stable. FR treatment of polyester fabrics, particularly Trevira CS which is inherently flame resistant, does not typically involve the same dye interaction risks as cellulosic FR treatment. Disperse-dyed polyester fabrics are generally low-risk for FR treatment. A known issue with disperse dyes is discolouration from oxides of nitrogen in the atmosphere — a separate problem from FR treatment interaction but worth noting for polyester fabrics in high-pollution urban environments.

Direct dyes. Used on cellulosics. Direct dyes have good substantivity for cotton and linen but moderate wash fastness — they are relatively water-soluble. The FR treatment interaction risk is lower than for reactive dyes because the dye-fibre bond mechanism is different, but direct-dyed fabrics should still be assessed for colour stability before FR treatment. Their water solubility means they are somewhat susceptible to the aqueous conditions of wet padding regardless of pH.

Sulphur dyes. Used on cellulosics, producing blacks, dark browns, and dark navies. Sulphur dyes have been associated with isolated fading problems after FR treatment — typically affecting specific yarn colours within a fabric rather than the entire cloth, making the problem appear as uneven colour change across the weave. This is relatively uncommon but has been observed.

Which Fabrics Carry the Highest Risk

Cotton curtain fabrics in saturated colours — particularly bright reds, coral, fuchsia, and vivid blues and greens — are most likely to be dyed with reactive dyes and carry the highest risk of post-treatment fading. Linen curtain fabrics in the same colour range carry comparable risk. The deeper and more saturated the colour, the more likely reactive dyes are involved.

Pale, muted, or neutral colours in cotton and linen are sometimes dyed with direct or vat dyes, which carry lower risk. However, the dye class cannot be determined from the colour alone. The only way to confirm the dye type is to ask the supplier.

Wool, mohair, and silk upholstery fabrics dyed with acid dyes and back-coated rather than wet-padded are the lowest-risk category for FR treatment colour interaction. This is one of the practical advantages of specifying mohair velvet with an inherent Crib 5 certification: the need for wet-padded FR treatment is eliminated entirely, removing the dye interaction risk from the specification chain.

Synthetic fabrics — polyester, Trevira CS, nylon — are generally low risk for dye interaction in FR treatment, with the specific disperse dye caveat noted above.

What to Ask Before Sending a Fabric for FR Treatment

Before sending any fabric to an FR treatment company for Crib 5 treatment, confirm the following with the fabric supplier.

Which dye class was used on this fabric? If the supplier cannot answer this question, treat the fabric as reactive-dyed and proceed with caution. Most reputable fabric suppliers can provide this information from their mill technical data sheet.

Has this fabric been FR treated before, and were any colour changes observed? A fabric that has been successfully FR treated and stored without fading gives some reassurance. A fabric that has not been treated before carries the full unknown risk.

Is the colour in the current batch produced by the same dyehouse as previous batches? Dye lot variation between batches extends to dye class selection in some mills, where the dyehouse may substitute a dye type if the standard dye is temporarily unavailable.

Once you have confirmed the dye class, convey this information to the FR treatment company before treatment begins. Experienced treatment companies maintain records of which fabrics and dye classes have caused problems and can advise whether a screen test — treating a small sample and storing it for an extended period before treating the full order — is warranted.

The FR Treatment Process and Colour Change: Timing and Detection

Immediate colour change visible at the point of treatment is typically caused by a direct chemical reaction between the FR compound and the dye. This type of problem is detectable during the treatment process and gives the treatment company an immediate opportunity to halt treatment and contact the specifier. It is the minority of dye-FR problems.

Progressive fading developing over weeks to months after treatment is caused by the mechanism described earlier — the FR treatment weakens the dye-fibre bond, making the dye susceptible to subsequent degradation by atmospheric pollutants. This type of problem is not detectable at the time of treatment and will not be evident at the point of installation. It develops after the fabric is in situ. By the time it is noticed, the treatment cannot be reversed and the fading cannot be corrected without replacing the fabric.

This is the most commercially damaging outcome of dye-FR interaction. It occurs after the project is complete, generates a complaint the designer cannot easily resolve, and involves a fault that originated in the specification chain before installation. The only effective mitigation is to avoid the risk at the specification stage by confirming the dye class before specifying the fabric for FR treatment.

Frequently Asked Questions

Can any fabric be FR treated without colour change risk?

No fabric carries zero risk, but the risk varies significantly by dye class and treatment method. Wool and mohair fabrics dyed with acid dyes and back-coated for Crib 5 carry the lowest practical risk of colour change from FR treatment. Cellulosic fabrics — cotton, linen — dyed with vat dyes and wet-padded carry low risk. Cellulosic fabrics dyed with reactive dyes and wet-padded carry the highest risk of progressive fading. Always confirm the dye class with the supplier before specifying a fabric for FR treatment.

What are reactive dyes and why are they a problem for FR treatment?

Reactive dyes are a dye class widely used on cotton, linen, and viscose that produce vivid colours with good light and wash fastness under normal conditions. The dye molecule forms a covalent chemical bond with the fibre during dyeing. This bond is sensitive to acidic conditions. The mildly acidic FR solutions used in some wet-padding treatments can weaken the bond, making the dye susceptible to progressive fading from atmospheric pollutants in the months after treatment. The fading is not visible at installation. Reactive dyes are the dye class most frequently associated with post-treatment fading problems documented by specialist FR treatment houses.

Does back-coating affect fabric colour?

Back-coating, applied to the reverse of the fabric, does not typically affect the face colour provided the treatment is applied correctly and the fabric is not saturated. It is the wet-padding process — where FR chemicals in solution are applied to the whole fabric — that carries the dye interaction risk. Back-coating is the standard method for upholstery fabric Crib 5 treatment and has minimal colour impact on the face dyes under normal application conditions.

How can I tell if a fabric has been dyed with reactive dyes?

You cannot determine the dye class from visual inspection or handling alone. The dye class must be confirmed with the fabric supplier, who should be able to provide this information from the mill technical data sheet. As a general guide, cotton and linen fabrics in saturated, vivid colours — bright reds, corals, vivid blues and greens — are more likely to be reactive-dyed. Pale and muted neutrals in the same fibres may use direct or vat dyes. This is a guide only and cannot substitute for direct confirmation.

What should I do if I cannot avoid specifying a reactive-dyed fabric for FR treatment?

Request that the FR treatment company treats a sample piece and stores it under normal conditions for three to six months before treating the full order. This does not guarantee that the full order will behave identically, but it provides the best available advance warning of a fading risk. Brief the client on the risk before treatment and document the briefing. If fading develops after installation, having documented the risk identification and mitigation steps provides important protection.

Is mohair velvet at risk from FR treatment colour change?

Mohair velvet that carries an independently certified Crib 5 pass achieved without topical treatment does not require FR treatment and therefore carries no dye-FR interaction risk. This is one of the practical advantages of specifying correctly certified mohair velvet for contract use: the treatment stage and its associated colour risks are removed from the specification chain entirely. Mohair velvet that requires topical treatment — because the specific range does not carry an inherent Crib 5 certification — is typically back-coated rather than wet-padded, which also carries low colour interaction risk as noted above.

For guidance on which fibres and fabric types can be FR treated, see our guide to FR treatment and fibre compatibility. For the fire certification standards that require treatment, see our Crib 5 guide.

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Colour Fastness and Crocking: Specifier’s Guide for Interior Designers

Colour Fastness and Crocking: A Specifier’s Guide for Interior Designers

Crocking grade minimum for contract upholstery: Grade 4 dry / Grade 3 wet (ISO 105-X12 grey scale)
Light fastness minimum for contract interiors: ISO 105-B02 grade 5 — grade 6 for south-facing or high-light environments
Highest crocking risk: Dark colourways, velvet pile fabrics, deeply saturated reds and navies
Reverse crocking risk: New denim, dark throw cushions, and clothing transferring dye onto light upholstery

Colour fastness describes how well a fabric retains its colour when exposed to the agents most likely to cause change: light, rubbing, cleaning, and moisture. Crocking is a specific type of colour fastness failure in which excess dye transfers from one surface to another through friction. Both are routine specification criteria for contract fabric but are consistently underspecified in residential projects, which is where most complaints about colour change and dye transfer originate.

This guide explains the two tests that matter most — ISO 105-B02 for light fastness and ISO 105-X12 for crocking — how to read the grades, which fabrics and colourways carry the highest risk, and what to specify to avoid problems in use. For colour naming, systems, and metamerism — why the same colour looks different in different light — see our colour naming and specification guide. For light fastness guidance specific to room orientation and project environment, see our complete guide to light fastness and the Blue Wool Scale. For dye types and their interaction with FR treatment, see our post on dye types and FR treatment compatibility.

The Two Tests That Matter

Colour fastness is not a single test. It is a family of tests under the ISO 105 series, each measuring resistance to a specific agent. For interior fabric specification, two tests are routinely relevant and should appear on every contract fabric data sheet.

ISO 105-B02: Colour fastness to light. This test measures how resistant a fabric’s colour is to degradation by light. A xenon arc lamp simulates sunlight and the fabric is exposed for a controlled duration. The result is graded against the Blue Wool Scale from 1 to 8, where grade 1 indicates very poor light fastness and grade 8 indicates the highest possible resistance. For a full explanation of this test and the Blue Wool Scale, see our light fastness guide.

ISO 105-X12: Colour fastness to rubbing (crocking). This test measures how much dye transfers from a fabric onto other surfaces through friction. The fabric is rubbed with a standardised white cloth using a crockmeter — a machine that applies controlled pressure and movement — under both dry and wet conditions. The degree of staining on the white cloth is assessed using the grey scale for staining, graded from 1 to 5. Grade 5 indicates no staining. Grade 1 indicates severe staining. Most contract specifications require a minimum of grade 4 for dry rubbing and grade 3 for wet rubbing.

Understanding Crocking

Crocking occurs when dye that has not fully bonded to the fabric fibre transfers onto another surface through friction. Every dyed fabric contains some proportion of unfixed dye after manufacture. The degree of crocking depends on the dye class used, the dyeing process, the fibre type, and whether the fabric has been adequately washed and finished after dyeing to remove surplus dye.

Dry crocking is caused by mechanical abrasion alone. A fabric in good condition and correctly dyed will typically achieve a better dry crocking grade than wet. Wet crocking occurs when moisture is present — from perspiration, cleaning, or humidity — and is almost always worse than dry crocking because water molecules help loosen dye and carry it to the adjacent surface. This is why a fabric that appears stable in dry conditions can transfer colour noticeably on a humid day or after light spillage.

The fabrics most susceptible to crocking are those with rough or open pile surfaces, dark saturated colourways, and fibres that are difficult to dye with strong molecular bonds. Velvet is the most relevant category for interior designers. The pile surface of velvet creates more friction points than a flat-woven fabric and dye at the pile tips is more exposed to contact than dye within the body of a woven yarn. Dark velvet colourways — deep navy, rich red, dark green, charcoal — are dyed with higher concentrations of pigment and carry greater crocking risk than pale or mid-tone colourways of the same fabric.

Denim is the most commonly cited source of reverse crocking onto upholstery. New denim is typically dyed with indigo, which physically lodges within the fibre structure rather than forming a covalent bond. Indigo is easily dislodged by friction and moisture and will transfer readily onto light-coloured upholstery, particularly in warm or humid conditions. In a hotel or hospitality environment this is commercially significant: a guest in new jeans sitting on a pale upholstered chair can leave a visible mark within a single visit.

Crocking Grades: What They Mean in Practice

Grade 5: No staining. No dye transfers to the rubbing cloth. Rarely achieved by dark saturated colourways on pile fabrics.

Grade 4: Slight staining. A small amount of dye transfers but is barely visible. The minimum acceptable grade for dry crocking in most contract specifications.

Grade 3: Moderate staining. Visible dye transfer that would be noticeable in use. The minimum acceptable grade for wet crocking in most contract specifications. Grade 3 dry would indicate elevated crocking risk and should prompt discussion with the supplier before specifying for high-contact applications.

Grade 2: Significant staining. Noticeable colour transfer likely in use. Not acceptable for contract upholstery. May be flagged as acceptable for cushion or decorative applications only.

Grade 1: Severe staining. The fabric will visibly transfer colour in normal use. Not acceptable for any upholstery application.

The accepted industry minimum for contract upholstery fabrics is grade 4 dry and grade 3 wet. For hotel and hospitality environments where guests wear a wide range of clothing and the fabric is cleaned frequently, specifying grade 4 for both dry and wet provides better protection. Always confirm both grades — dry and wet — before specifying, as some suppliers report only the dry grade.

Crocking and Velvet: Specific Considerations

Velvet requires particular attention in crocking specification for two reasons. First, the pile structure creates more contact surface than a flat-woven fabric, increasing the potential for dye transfer in use. Second, velvet in dark colourways is dyed with higher pigment concentrations to achieve the depth of colour that makes dark velvet visually distinctive. The combination of pile structure and high pigment load means that dark velvets consistently achieve lower crocking grades than the same fabric in pale colourways.

This does not mean dark velvet cannot be specified for contract use. Mohair velvet in particular achieves good colour fastness due to the natural receptivity of the mohair fibre to acid dyes and the strong molecular bonds those dyes form with protein fibres. A well-dyed dark mohair velvet will typically achieve grade 3 to 4 dry and grade 3 wet, which is within the acceptable range for contract use. The key is confirming the actual grade for the specific colourway before specifying, not assuming a single grade applies across all colourways in the range.

Pale colourways of any velvet carry the reverse crocking risk: dye transfer from clothing onto the fabric. This is most acute with white, cream, and very pale colourways in environments where guests may be wearing freshly laundered dark clothing or new denim. For hotel seating in these colourways, confirm the crocking grade of the fabric in the context of incoming dye transfer, not just outgoing.

For a full comparison of velvet fibre types and their relevant specification data, see our velvet types compared guide.

Light Fastness and Crocking: How They Relate

Light fastness and crocking are distinct tests measuring different forms of colour stability, but they are both dye-related and a fabric that performs poorly on one will often perform poorly on both if the underlying dye chemistry is weak. A fabric dyed with reactive dyes, for example, will typically show moderate light fastness and may show crocking susceptibility, particularly after FR treatment. A fabric dyed with vat dyes — the most stable dye class — will achieve excellent light fastness and low crocking risk. Understanding the dye type used is therefore useful context when evaluating both grades.

The practical relationship for specifiers is as follows. A fabric that achieves light fastness grade 6 and crocking grade 4 dry is a well-dyed fabric with strong molecular dye-fibre bonds throughout. A fabric that achieves light fastness grade 3 and crocking grade 2 dry has weak dye-fibre bonds and is likely to show visible colour change and dye transfer in use within months. Neither extreme is always obvious from looking at the fabric in a showroom.

Always request both grades from the supplier before specifying for contract use. A supplier who cannot provide both grades — either because the fabric has not been tested or because the grades are not published — is a supplier whose fabric should not be specified for contract without independent testing.

Colour Fastness After FR Treatment

FR treatment can affect colour fastness. Back-coating, the most common method of applying Crib 5 treatment to upholstery fabrics, involves applying a chemical compound to the reverse of the fabric. Provided the treatment is applied correctly and does not penetrate the face of the fabric, it typically has no effect on the colour fastness or crocking grade of the face fabric.

Wet padding, used for certain curtain and lighter-weight fabrics, applies FR chemicals to the fabric in solution. Reactive dyes are known to be sensitive to the mild acidic conditions involved in some FR padding treatments. In some cases, fading can develop in the months following treatment — not immediately after, but progressively as atmospheric pollutants interact with the treated fabric. This is not visible at the time of installation and cannot be detected by standard pre-treatment testing. If specifying a fabric with reactive dyes for FR treatment, confirm with the treatment provider whether fading has been observed with that dye class on similar fabrics, and request sample swatches treated and stored for three to six months before committing to a full order.

For full detail on dye types and FR treatment interactions, see our post on dye types and FR treatment compatibility.

What to Check Before Specifying

Request the ISO 105-X12 crocking grade for both dry and wet conditions, and for the specific colourway you are ordering. Crocking grades can vary significantly between colourways within the same range, particularly between dark and pale colourways. A grade reported for the standard or mid-tone colourway in a range may not reflect the performance of the darkest available colourway.

Request the ISO 105-B02 light fastness grade for the specific colourway. As with crocking, light fastness varies between colourways and a dark colourway may achieve a higher grade than a pale one in the same range.

If the fabric is to be FR treated, confirm the dye class and whether fading problems have been observed with similar fabrics and treatments. Ask the treatment provider directly, not just the fabric supplier.

For hotel and hospitality projects, consider the reverse crocking risk for pale upholstery. The fabric’s own crocking grade tells you how much dye will transfer out. It does not tell you how resistant the fabric surface is to incoming dye transfer from guests’ clothing. Pale, tight-woven, or coated fabrics are more resistant to incoming dye transfer than pale velvet or pale linen.

Frequently Asked Questions

What is crocking in upholstery fabric?

Crocking is the transfer of excess dye from a fabric onto another surface through friction. It occurs when dye has not fully bonded to the fibre during dyeing, leaving surplus pigment on or near the surface that is dislodged by contact. Crocking can be dry, caused by mechanical friction alone, or wet, where moisture helps carry the dye to the adjacent surface. Wet crocking is almost always worse than dry. It is tested to ISO 105-X12 and graded 1 to 5, with grade 5 meaning no transfer and grade 1 meaning severe transfer. The minimum acceptable grades for contract upholstery are grade 4 dry and grade 3 wet.

Which fabrics crock the most?

Dark saturated colourways of pile fabrics — particularly velvet — carry the highest crocking risk. The pile surface creates more friction points than a flat-woven fabric and dark colourways are dyed with higher pigment concentrations. Denim is the most commonly cited source of reverse crocking onto upholstery, particularly onto pale fabrics. New denim dyed with indigo can transfer blue dye onto light-coloured seating on first contact. Cotton velvet in dark colourways has higher crocking risk than mohair velvet in comparable colourways due to the stronger molecular bond formed between acid dyes and protein fibres.

What crocking grade should I specify for hotel upholstery?

For hotel and hospitality upholstery, specify a minimum of grade 4 dry and grade 3 wet to ISO 105-X12. For pale upholstery in environments where guests wear a wide range of clothing, consider the reverse crocking risk from incoming dye transfer and prefer fabrics with tighter weave structures or protective finishes. For dark velvet in high-contact seating, confirm the specific colourway crocking grade with the supplier before ordering, as grades can vary significantly between the darkest and lightest colourways in the same range.

Does FR treatment affect crocking and colour fastness?

Back-coating, the most common method for upholstery, typically does not affect the face colour of the fabric if applied correctly. Wet padding treatments used for curtains and lighter fabrics can affect fabrics dyed with reactive dyes. Reactive dyes are sensitive to mild acidic conditions and can fade progressively in the months following treatment, a problem that is not visible at installation. If specifying a fabric with reactive dyes for FR treatment, confirm with the treatment provider whether this has been observed with similar fabrics.

What is the difference between crocking and light fastness?

Crocking is the transfer of dye to other surfaces through friction, tested to ISO 105-X12. Light fastness is the resistance of a fabric’s colour to degradation by light exposure, tested to ISO 105-B02 and graded on the Blue Wool Scale from 1 to 8. Both reflect the quality of the dye-fibre bond, and a fabric with weak dye chemistry will often perform poorly on both. They are separate tests and a fabric must be tested to both standards to report both grades. A high Martindale rub count does not imply good crocking or light fastness — these are entirely separate properties.

Can new jeans stain my upholstery?

Yes. New denim is typically dyed with indigo, which physically lodges within the cotton fibre rather than forming a chemical bond. Indigo transfers readily onto adjacent surfaces through friction, particularly in warm or humid conditions. The risk is highest with pale upholstery fabrics, particularly those with open or pile surfaces. Tight-woven, solution-dyed, or coated fabrics are more resistant to incoming dye transfer than velvet or linen. In hotel environments with pale seating, this is a practical specification consideration rather than a theoretical one.

For specification data on individual Kothea ranges see the mohair velvet, upholstery linen, and faux leather product pages.

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Faux Leather Types Compared: PVC vs PU vs Silicone Leather for Upholstery

Faux Leather Types Compared: PVC, PU and Silicone Leather for Interior Designers

Most durable for contract use: PVC — highest abrasion resistance, best chemical resistance, inherently suited to Crib 5 certification
Softest handle: PU — closer to genuine leather in feel, better breathability, lower abrasion resistance than PVC
Best for marine, healthcare, and outdoor: Silicone leather — inherently flame resistant, UV stable, no plasticisers, widest temperature range
Kothea range: Faux Leather 3 is PVC — 100,000+ Martindale, Crib 5, wipe-clean, 140cm wide

Faux leather is not a single material. The term covers three structurally distinct product types — PVC, PU, and silicone leather — each with different performance profiles, fire characteristics, cleaning requirements, and environmental credentials. Specifying between them on the basis of appearance alone is the most common error in faux leather selection. This guide explains the differences that matter for a professional specification.

For background on Martindale rub counts referenced throughout this guide, see our Martindale rub test guide. For fire standards, see our Crib 5 guide and, for marine projects, our IMO marine fire standards guide.

What All Three Have in Common

PVC, PU, and silicone leather are all coated fabrics. They consist of a woven or knitted textile backing, typically polyester, to which a polymer coating is applied to create a surface that resembles leather. The backing provides tensile strength, dimensional stability, and the base for the coating to adhere to. The coating determines the surface properties: appearance, feel, stain resistance, fire behaviour, UV resistance, and cleaning compatibility.

All three can be produced in a wide range of colours and surface textures. All three are sold by the metre without the hide-size limitations of genuine leather. All three are easier to specify consistently across large projects than genuine leather, where dye lot and grain variation between hides is unavoidable. None requires the animal welfare considerations associated with genuine leather.

Beyond these shared characteristics, the three types diverge significantly in performance, sustainability, and appropriate application.

PVC Leather (Polyvinyl Chloride)

PVC leather is the most widely used faux leather in UK contract interiors. It consists of a PVC polymer paste coating applied over a polyester backing. The structure is dense and impermeable, with no open pores in the surface coating. This is what gives PVC leather its characteristic durability, stain resistance, and ease of cleaning.

Durability. PVC leather achieves the highest abrasion resistance of any faux leather type. High-specification PVC ranges routinely exceed 100,000 Martindale rubs. The dense multi-layer structure resists surface wear better than PU at equivalent price points. This makes PVC the default choice for hotel restaurant seating, bar stools, transport upholstery, and any application where the fabric will receive sustained and continuous contact.

Fire rating. PVC contains inherent fire-resistant properties due to its high chlorine content. A correctly formulated PVC faux leather can achieve BS 5852 Crib 5 certification without backcoating, though the specific compound formulation and any foam used in a composite test must be confirmed by an independent test certificate. PVC faux leather is among the most readily Crib 5-certifiable upholstery materials available.

Cleaning and chemical resistance. PVC resists water, alcohol, disinfectants, and most common cleaning agents. The impermeable surface can be wiped clean between uses without specialist products. This is the property that makes PVC faux leather the standard choice for healthcare environments, food and beverage seating, and any application where contamination is a practical concern. Confirm compatibility between specific cleaning agents and the specific product before specifying for environments using industrial or hospital-grade disinfectants.

Light fastness. PVC has good inherent UV resistance, typically achieving ISO 105-B02 grade 6 or above in mid and dark colourways. This is significantly better than most natural-fibre upholstery fabrics and makes PVC suitable for south-facing rooms and high-light environments where natural fabrics would require careful colourway selection.

Handle and breathability. PVC leather is the least breathable of the three types. In sustained contact, particularly in warm environments, the impermeable surface can feel warm or sticky. This is rarely a significant factor for seating used in short intervals — restaurant chairs, bar stools, meeting room chairs — but is relevant for seating used for extended periods, such as office chairs or long-haul transport seating where PU may be preferred.

Environmental profile. PVC has the highest environmental cost of the three types. The chlorine-based polymer produces dioxin compounds during manufacture and at end of life. PVC is difficult to recycle due to its mixed material composition. Many high-specification PVC faux leathers now use phthalate-free plasticiser formulations in response to EU REACH regulations, which address the most significant health concerns, but the underlying polymer chemistry remains a legitimate sustainability concern.

Cost position. Mid-range. High-specification PVC faux leather offering 100,000+ Martindale rubs and Crib 5 certification is competitively priced relative to the performance it delivers. It is typically less expensive than equivalent-performing PU microfibre or silicone leather.

Best for: Hotel restaurant and bar seating, healthcare upholstery, transport seating, high-traffic contract environments, marine exterior seating, headboards in hotel bedrooms, wall panelling in food and beverage environments.

Not recommended for: Extended-contact seating in warm environments where breathability matters. Projects with strict environmental sustainability requirements. Applications requiring inherent flame resistance without reliance on PVC chemistry.

PU Leather (Polyurethane)

PU leather consists of a polyurethane coating applied over a textile backing, typically a cotton or polyester base. The polyurethane surface is softer, more flexible, and more breathable than PVC, and produces a finish that more closely resembles genuine leather in handle and drape.

Durability. Standard PU leather achieves 30,000 to 80,000 Martindale rubs depending on construction and grade. High-specification PU microfibre products, where the PU coating is applied to a microfibre non-woven backing, can exceed 100,000 rubs and approach PVC performance. However, at equivalent price points, PVC typically outperforms standard PU in abrasion resistance. PU is also more susceptible to degradation from hydrolysis — the breakdown of the polymer by moisture and humidity over time — particularly in warm, humid environments. This is the primary cause of the peeling and surface delamination seen in lower-grade PU after two to three years of use.

Fire rating. PU does not have the inherent fire resistance of PVC. PU faux leather typically requires a fire-retardant additive or backcoating to achieve BS 5852 Crib 5 certification. The treatment adds cost and affects lead time. Always confirm the Crib 5 certification method with the supplier — whether inherent to the formulation or applied — and request the independent test certificate.

Cleaning and chemical resistance. PU leather is water-resistant but less resistant to solvents and alcohol than PVC. The micro-surface of PU is more prone to absorbing certain staining agents over time. PU is generally not recommended for environments where strong disinfectants are used routinely. Confirm the specific cleaning regime with the supplier before specifying for healthcare or high-frequency cleaning environments.

Light fastness. PU achieves good light fastness — typically ISO 105-B02 grade 5 to 6 — though slightly lower than PVC in most cases. Standard PU is not recommended for outdoor use. High-specification PU microfibre designed for automotive applications achieves better UV performance, but standard contract PU faux leather should be confirmed for light fastness before specifying in south-facing or high-light environments.

Handle and breathability. PU is softer and more breathable than PVC. In extended seating use it is more comfortable and does not produce the warm or sticky sensation associated with PVC in warm conditions. For office seating, residential-specification seating in hospitality environments, and any application where extended contact comfort matters, PU offers a noticeably better tactile experience.

Environmental profile. PU is more environmentally benign than PVC in manufacture and disposal. It does not contain chlorine and does not produce dioxins. Some PU products use water-based polyurethane systems, which significantly reduce VOC emissions during manufacture. PU is the more sustainable choice between PVC and PU for projects with environmental requirements, though silicone leather goes further on most sustainability measures.

Cost position. Mid to high. Standard PU faux leather is broadly comparable to PVC. High-specification PU microfibre products are premium priced.

Best for: Luxury residential specification where genuine leather handle is desired without the maintenance requirements. Boutique hotel seating where tactile quality is a client priority. Office seating where extended contact comfort matters. Environments where PVC sustainability concerns are commercially relevant.

Not recommended for: High-humidity environments where hydrolysis degradation is a risk. Environments requiring regular disinfectant cleaning. Heavy contract seating where maximum abrasion resistance is the priority. Marine exterior use.

Silicone Leather

Silicone leather is a coated fabric where the coating is a silicone resin rather than a PVC or PU polymer. It is the newest of the three types in commercial interior use and commands a significant price premium. Its performance profile is distinctive enough to make it the correct specification in a specific set of applications.

Durability. Silicone leather achieves high abrasion resistance — 100,000 Martindale rubs and above — and is resistant to UV degradation, extreme temperatures, and chemical exposure in ways that PVC and PU cannot match. The silicone polymer does not break down under UV light, maintains flexibility at low temperatures where PVC may crack, and remains stable at high temperatures. This makes it the correct specification for outdoor and semi-outdoor use, and for environments with extreme temperature or UV exposure.

Fire rating. Silicone is inherently flame resistant. The polymer structure does not require plasticisers or fire-retardant additives to achieve fire resistance. This inherent property survives cleaning and does not degrade over the life of the fabric. For applications where fire certification must survive aggressive cleaning regimes — healthcare, public transport, marine interiors — the inherent nature of silicone’s fire resistance is a significant specification advantage.

Cleaning and chemical resistance. Silicone leather has the best chemical resistance of the three types. Its low surface tension makes it inherently stain-resistant and resistant to oils, solvents, disinfectants, and most common cleaning agents. Hospital-grade disinfectants, bleach solutions, and alcohol-based cleaners that would degrade PU and may affect certain PVC formulations over time can be used on silicone leather without surface damage.

Light fastness. Silicone leather offers the best UV resistance of the three types. The polymer structure does not degrade under UV exposure in the way that PVC and PU can over time. Silicone leather is the correct specification for outdoor seating, terraces, poolside furniture, and marine exterior cushions exposed to sustained sunlight.

Handle and breathability. High-quality silicone leather has a distinctive soft, smooth handle that is different from both PVC and PU. It does not have the rigidity or warmth-retention of PVC, and its surface does not develop the micro-cracking associated with ageing PU. The handle is a matter of preference but it does not closely approximate genuine leather in the way that high-grade PU can.

Environmental profile. Silicone is derived from silica, a naturally occurring mineral. The manufacturing process uses no solvents, produces low VOC emissions, and no dioxins or phthalates. Silicone does not break down into microplastics. It can be downcycled at end of life. Silicone leather is the most environmentally responsible of the three types by most measures, and its environmental credentials are defensible to a degree that PVC and standard PU are not.

Cost position. High. Silicone leather commands a significant premium over PVC and PU. For most standard contract applications where PVC would perform adequately, the premium is not justified by the performance advantage. Where the specific properties of silicone — UV stability, temperature range, chemical resistance, inherent flame resistance — are genuinely required, the cost is appropriate.

Best for: Outdoor and semi-outdoor seating exposed to UV and weather. Marine interior seating on commercial and charter vessels where IMO certification is required and inherent flame resistance is an advantage. Healthcare environments requiring aggressive chemical cleaning with inherent fire resistance. High-end residential projects where sustainability credentials are a client requirement.

Not recommended for: Standard contract interiors where PVC delivers equivalent performance at lower cost. Any project where budget is a primary constraint.

Comparison at a Glance

Martindale rub count: PVC high-specification 100,000+; PU standard 30,000 to 80,000, PU microfibre 100,000+; silicone 100,000+.

Fire certification: PVC can achieve Crib 5 inherently; PU typically requires FR additive or backcoating; silicone is inherently flame resistant.

Cleaning compatibility: PVC excellent with most agents; PU good with mild products, caution with solvents; silicone excellent with all agents including hospital-grade disinfectants.

UV resistance: PVC good, grade 6+; PU moderate, grade 5 to 6; silicone excellent, stable under extended UV exposure.

Breathability: PVC low; PU moderate; silicone moderate.

Environmental profile: PVC highest impact, chlorine-based; PU moderate, better than PVC; silicone lowest impact, no solvents or plasticisers.

Cost relative to performance: PVC best value for standard contract use; PU best value where handle and breathability matter; silicone justified where its specific properties are genuinely required.

Kothea Faux Leather

Kothea’s Faux Leather 3 is a high-specification PVC faux leather achieving in excess of 100,000 Martindale rubs with a Crib 5 fire rating. It is 140cm wide, available in over 20 colourways, and carries a wipe-clean surface compatible with water-based hotel and contract cleaning products. It is the correct specification for hotel restaurant and bar seating, headboards, wall panelling, and high-traffic contract upholstery where maximum durability, fire certification, and cleaning compatibility are the primary requirements.

For hotel and hospitality specification guidance including Martindale thresholds by room type, see our hotel fabric specification guide. For marine projects requiring IMO certification, see our IMO marine fire standards guide.

Frequently Asked Questions

What is the difference between PVC and PU faux leather?

PVC faux leather uses a polyvinyl chloride coating and has the highest abrasion resistance, best chemical resistance, and most readily achievable Crib 5 fire rating of any faux leather type. PU faux leather uses a polyurethane coating and is softer, more breathable, and more environmentally responsible than PVC, but typically achieves lower abrasion resistance at equivalent price points and requires FR treatment to achieve Crib 5. PVC is the standard choice for heavy contract use. PU is preferred where tactile quality and breathability matter more than maximum durability.

What is silicone leather and when should I specify it?

Silicone leather is a coated fabric where the surface coating is silicone resin rather than PVC or PU. It is inherently flame resistant, UV stable, resistant to extreme temperatures, and compatible with hospital-grade cleaning agents. It commands a significant price premium over PVC and PU and is the correct specification for outdoor and semi-outdoor seating, marine interiors, healthcare environments requiring aggressive chemical cleaning, and high-end projects where environmental sustainability is a client requirement. For most standard contract interiors, PVC delivers equivalent or superior performance at lower cost.

Which faux leather is most durable for hotel use?

High-specification PVC faux leather is the most durable and most practically suited to hotel use. It achieves 100,000+ Martindale rubs, can be Crib 5 certified, and is compatible with the water-based and alkaline cleaning products used in hotel housekeeping. PU leather at equivalent price points achieves lower abrasion resistance and is less resistant to the cleaning chemicals used in hotel environments. For hotel restaurant seating, bar stools, and headboards, PVC is the default specification. See our hotel fabric specification guide for Martindale thresholds by room type.

Is PVC faux leather suitable for marine use?

PVC faux leather is suitable for marine use subject to fire certification. For private yachts, a Crib 5 certificate is typically sufficient. For commercial charter vessels under the MCA Large Commercial Yacht Code, the fabric must hold an IMO FTP Code Part 8 certificate obtained from an IMO-approved laboratory. A Crib 5 certificate does not substitute for an IMO Part 8 certificate on commercial vessels. PVC is well suited to marine environments in terms of moisture resistance, UV stability, and cleaning compatibility. Silicone leather offers superior UV and temperature performance for exterior marine applications. See our IMO marine fire standards guide for full detail.

Does faux leather fade in sunlight?

PVC faux leather typically achieves ISO 105-B02 grade 6 or above and is suitable for most residential and contract environments including south-facing rooms. PU achieves grade 5 to 6 and should be confirmed for high-light environments. Silicone leather is the most UV stable of the three types and is the correct specification for outdoor or sustained direct-sunlight applications. For full guidance on light fastness grades and room orientation, see our light fastness guide.

Is PU leather better than PVC for sustainability?

PU is more environmentally responsible than PVC in manufacture and disposal. PVC production uses chlorine-based chemistry that produces dioxin compounds. PU does not contain chlorine and some PU products use water-based systems that further reduce environmental impact. Silicone leather has the best environmental profile of the three types — it is derived from silica, uses no solvents in manufacture, produces no dioxins or phthalates, and does not break down into microplastics. For projects where environmental credentials are a priority, PU offers a better position than PVC, and silicone leather offers the most defensible environmental specification.

For healthcare fabric specification including silicone leather and healthcare-grade PVC, see our healthcare fabric guide. For when to use faux leather instead of velvet, see our when not to use velvet guide.

For faux leather specification in outdoor terraces and semi-outdoor hospitality environments, see our outdoor terrace fabric specification guide.

For Building Safety Act 2022 documentation requirements for fabric in higher-risk buildings, see our Building Safety Act guide.

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5 April 20267 April 2026

Fabric for Wall Panels and Headboards: BS EN 13501-1, BS 476 Part 7 and Headboard Fire Standards

Fabric for Wall Panels and Headboards: Fire Standards and Specification Guide for Interior Designers

Wall lining standard: BS EN 13501-1 (new projects) / BS 476 Part 7 (legacy specifications)
Most commercial interiors require: Euroclass B or C — circulation routes require B-s1,d0 or better
Crib 5 does not qualify fabric for wall use — wall panels must be tested as a composite with their substrate
Headboards: confirm with fire officer whether BS 5852 or BS EN 13501-1 applies before specifying

Fabric applied to walls and fabric used in headboards occupies a regulatory category that is distinct from upholstery fabric and frequently misunderstood. The standard that governs contract upholstery, BS 5852, is not typically the governing standard for wall linings, though it may still be required in parallel for padded elements where the fire strategy treats them as upholstered furniture. Wall-mounted fabric falls primarily under the surface spread of flame framework: BS EN 13501-1 for new UK projects, or BS 476 Part 7 for legacy specifications. BS EN 13501-1 is now the modern standard for most new work and uses a different classification system from BS 476 Part 7, based on a different test methodology. The difference matters because a fabric that carries a full BS 5852 Crib 5 certificate may not satisfy the requirements for a wall panel application in the same room.

Headboards introduce a further complication. Whether a headboard must meet the upholstery standard or the wall lining standard depends on how it is constructed and installed, and on the interpretation of the fire officer or building control officer responsible for the project. This guide explains both frameworks, where they overlap, and how to specify correctly for each application.

For the upholstery fire standard referenced throughout this guide, see our complete guide to BS 5852 Crib 5.

Specifier Decision Framework

Before researching specific fabrics or requesting certificates, confirm the answers to the following questions in order. They determine which standards apply and what testing is required.

Is the fabric fixed to the wall as a surface lining? If yes, the primary standard is BS EN 13501-1 for new projects, or BS 476 Part 7 for legacy specifications. Confirm the required Euroclass with the fire officer before selecting fabric.

Is the wall-fixed element padded, upholstered, or thick enough that the fire strategy may treat it as furniture? If yes, confirm with the fire officer whether BS 5852 or BS 7176 is also required in parallel with the wall lining standard.

Is the fabric in a circulation route or means of escape? If yes, the required Euroclass is typically more demanding, often B-s1,d0 or equivalent. Confirm the specific requirement for the building type and area.

Is it a headboard? Confirm whether the headboard is classified as upholstered furniture (BS 5852 or BS 7176) or as a wall surface element (EN 13501-1 or BS 476 Part 7). See the headboard section below.

Is the application acoustic? Confirm that the face fabric is not coated or laminated in a way that reduces acoustic transmittance, and that the composite panel has been tested as an assembly.

The Wall Lining Standards: BS EN 13501-1 and BS 476 Part 7

BS EN 13501-1 is the current primary fire classification standard for construction products and building elements in the UK and Europe, and is the system most new projects specify to. It classifies reaction to fire using a Euroclass system of A1, A2, B, C, D, E, and F, with suffix designations for smoke production (s1, s2, s3) and flaming droplets (d0, d1, d2). The Euroclass system is based on the Single Burning Item test (EN 13823) and additional small flame tests, and measures a broader range of fire behaviours than the earlier British Standard tests.

BS 476 Part 7 is an older British Standard still referenced in many legacy specifications and some current projects. It classifies surface spread of flame from Class 1 to Class 4, with Class 1 representing the lowest spread. Euroclass B is often considered broadly comparable to Class 1 in practice, but the two systems use different test methods and are not directly equivalent. Where a project specifies in BS 476 terms, confirm with the fire officer or building control authority whether the EN classification is also acceptable as an alternative, and which system takes precedence.

For commercial buildings in England and Wales, Approved Document B of the Building Regulations increasingly references Euroclass requirements for wall and ceiling linings. For most internal areas, Euroclass B or C is required. For circulation areas and means of escape, a higher Euroclass, typically B-s1,d0 or better, may be required. The specific requirement varies by building type, area of use, and the fire strategy for the project. Always confirm the applicable standard and classification level with the fire officer or building control authority before specifying.

Euroclass Quick Reference

The BS EN 13501-1 Euroclass system is unfamiliar to many designers coming from a background in BS 476 or BS 5852. The main classes for wall and ceiling linings are as follows.

A1 and A2 are non-combustible or limited combustibility materials. Stone, concrete, glass, and mineral wool products typically achieve these classes. No fabric achieves A1. Some treated or composite fabrics on non-combustible substrates can approach A2.

B indicates very limited contribution to fire. This is the class typically required for wall linings in most contract commercial environments and is often considered broadly comparable in practice to Class 1 under BS 476 Part 7, though the two are not directly equivalent.

C indicates limited contribution to fire. Acceptable in some less critical internal areas depending on the fire strategy. Often considered broadly comparable in practice to Class 2 under BS 476 Part 7.

D and E indicate higher contribution to fire and are generally not acceptable for wall linings in commercial environments. F indicates no performance determined.

The suffix designations add further information. s1, s2, s3 indicate smoke production from low to high. d0, d1, d2 indicate flaming droplet production from none to high. A specification of B-s1,d0 means Euroclass B with low smoke and no flaming droplets, which is typically required in the most demanding areas such as means of escape. Where the suffix is not specified in a project brief, confirm the required level with the fire officer as it significantly affects which materials are acceptable.

Why Substrate Assembly Testing Is Not Optional: Real Examples

The following failures occur regularly on wall panel and headboard projects and are preventable only if the assembly is tested before specification is finalised.

Fabric passed Crib 5 but failed the wall panel test on MDF. A designer specified a mohair velvet with a full Crib 5 certificate for a hotel wall panel. The fire officer required BS 476 Part 7 Class 1 for the wall application. The Crib 5 certificate did not apply. The fabric was then tested on MDF and achieved only Class 2. FR treatment was required, adding three weeks to the programme.

Same fabric, different outcome on a different substrate. The same fabric, when tested on plasterboard with a mineral wool backing, achieved Class 1 without treatment. The substrate had determined the outcome, not the fabric alone. The panel system was redesigned around the plasterboard configuration.

Velvet classification changed after FR treatment was applied. A linen velvet achieved Class 2 untreated. FR treatment was applied to reach Class 1. The treatment visibly altered the pile handle and introduced a slight sheen to the surface that was unacceptable to the client. The fabric was replaced and the programme was delayed by four weeks.

Certificate rejected because the installation adhesive differed from the tested configuration. A fabric wall panel had been tested and certified using a specific contact adhesive. The site contractor used a different adhesive for practical reasons. The building control officer required re-testing of the as-built configuration.

Why Wall Fabric Must Be Tested as an Assembly

The most important practical point in specifying fabric for wall panels is that the fire test must be conducted on the fabric as it will actually be installed, including the substrate to which it is fixed and the method of fixing. A fabric tested on one substrate may achieve Class 1. The same fabric fixed to a different substrate with a different adhesive may achieve only Class 2 or Class 3. The certificate is valid for the tested combination only.

This means that a supplier’s claim that a fabric is Class 1 must be read carefully. Class 1 to what substrate? With what backing? Using what adhesive or fixing method? If the project’s substrate or installation method differs from the tested configuration, a new test is required or the supplier must confirm that the existing test covers the intended configuration.

For fabric-covered wall panels, the typical assembly consists of the face fabric, a backing or interliner, and a substrate panel, most commonly MDF, plasterboard, or a proprietary acoustic panel. The face fabric and the substrate together must be tested as a composite. The backing, if any, forms part of the tested assembly and cannot be substituted without affecting the validity of the certificate.

BS 5852 and BS 476 Part 7: Different Standards for Different Applications

BS 5852 measures how an upholstered composite of fabric and filling responds to an ignition source placed at the junction of the seat and back, simulating the conditions most likely to start a fire in a piece of seating. It is a composite test and the result applies to the specific combination of cover fabric and filling tested.

BS 476 Part 7 measures how quickly flame travels across the surface of a wall lining material when exposed to radiant heat. It is a surface test and the result applies to the specific fabric and substrate combination tested, as they would be installed on the wall.

The two standards test for different fire behaviours under different conditions and are not interchangeable. A fabric that passes BS 5852 Crib 5 for use on a sofa has not been tested for surface spread of flame on a wall. A fabric that achieves Class 1 to BS 476 Part 7 for use on a wall has not been tested for resistance to ignition as an upholstery composite. A fabric used for both wall panels and seating in the same project may need to be tested to both standards separately.

Specifying Fabric for Wall Panels in Practice

Before selecting a fabric for a wall panel application, confirm the following with the fire officer, building control officer, or the project’s fire strategy consultant.

What classification is required for wall linings in this building and this room? The answer will be Class 1 or Class 0 to BS 476 Part 7, or its EN equivalent, and may vary between different areas of the same building. Circulation routes and means of escape typically require a higher standard than finished rooms.

Has the specific fabric been tested to the required standard, and in what configuration? Request the test certificate and confirm that the substrate, backing, and fixing method in the certificate match the proposed installation.

If the fabric has not been tested, can the supplier arrange testing? Many specialist fabric suppliers and FR treatment companies can arrange composite testing through a UKAS-accredited testing laboratory. The test typically requires samples of the fabric and substrate together and takes three to four weeks. Budget for this in the project programme.

Does the fabric require topical FR treatment to achieve the required classification? If so, the same considerations apply as for upholstery: the treatment must be appropriate for the fabric type, must not visibly alter the appearance or handle, and must be carried out by a reputable specialist. The treated fabric must then be tested in the treated state, as the treatment forms part of the tested configuration.

Velvet on Walls

Velvet is a common choice for fabric wall panels in hospitality environments, luxury residential projects, and acoustic installations. The pile surface of velvet creates a warm and visually distinctive finish and provides genuine acoustic benefit. However, velvet requires careful specification for wall applications because the pile surface presents additional combustible material compared to a flat-woven fabric of the same fibre and weight.

The pile surface of velvet affects surface spread of flame performance through a combination of surface geometry, mass per unit area, and fibre type. The three-dimensional pile structure can encourage faster initial flame spread than a flat fabric of similar composition, though the fibre type is often the more significant variable. A mohair or wool velvet, whose fibre has inherent fire-resistant properties, may achieve a better surface spread of flame classification than a flat synthetic fabric of the same weight. Always test the fabric in its final pile form, including whether the pile will be cut or uncut, and with any surface treatments applied.

Mohair velvet, which carries natural fire-resistant properties arising from the protein structure of the fibre, performs better in surface spread of flame testing than cotton or linen velvet of equivalent construction. However, a wall panel application must be independently tested regardless of the fibre type. A Crib 5 certificate for mohair velvet as upholstery does not confer any classification under BS 476 Part 7 for wall use.

For full detail on velvet types and their fire characteristics as upholstery fabrics, see our velvet types compared guide.

Acoustic Wall Panels

Fabric-covered acoustic panels are a common specification in hospitality, office, and residential projects where both aesthetics and sound absorption are required. The acoustic performance of a panel depends primarily on the density and thickness of the absorptive core, typically a mineral wool, polyester fibre, or acoustic foam substrate, and is not significantly affected by the face fabric provided the fabric is sufficiently open in weave to allow sound to pass through.

The face fabric for an acoustic panel must allow sound to pass through rather than reflect it. Most upholstery velvets are sufficiently open in construction to be acoustically semi-transparent, though heavy coatings, tight laminated backings, or very dense pile can significantly reduce sound absorption. Faux leather and PVC-coated fabrics are acoustically reflective and are not suitable as the face fabric of an acoustic panel unless acoustic performance is not a requirement. Confirm the acoustic transmittance of the face fabric with the panel manufacturer before specifying, particularly if the fabric has any backing applied.

The fire classification of an acoustic panel is determined by the composite of face fabric, core material, and substrate. The core material in many proprietary acoustic panels is inherently non-combustible mineral wool, which significantly supports the fire performance of the overall panel. Confirm the composite test data with the acoustic panel manufacturer rather than specifying the face fabric and core separately and assuming the combination will achieve the required classification.

Headboards: The Regulatory Ambiguity

Headboards are the most ambiguous fabric application in interior specification from a fire standard perspective. Whether a headboard must meet the upholstery standard BS 5852 or the wall lining standard BS 476 Part 7 depends on its construction, its method of fixing, and the interpretation of the fire officer or building control authority for the project.

A headboard that is freestanding, or attached to the bed frame and structurally independent of the wall, is typically treated as upholstered furniture. In a hotel or other commercial environment this means the fabric and filling composite should meet BS 5852 Crib 5, and for hotel projects the full BS 7176 Medium Hazard standard is appropriate. For full detail on hotel headboard specification see our hotel fabric specification guide.

A headboard that is fixed directly to the wall and forms part of the wall surface may be treated as a wall lining under the building’s fire strategy, in which case BS 476 Part 7 Class 1 is the appropriate standard rather than BS 5852. In some projects, particularly where a large padded wall panel extends beyond the width of the bed and forms a feature wall, the fire officer may treat the entire panel as a wall lining.

The correct approach in any commercial project is to confirm the applicable standard with the fire officer before selecting the fabric, rather than assuming which standard applies. Where uncertainty exists, specifying a fabric that can be tested to both BS 5852 Crib 5 and BS 476 Part 7 Class 1 eliminates the ambiguity, though both tests will need to be carried out separately and the certificates documented separately.

Headboard Classification at a Glance

The applicable fire standard for a headboard depends on its construction and installation method. The following gives the typical position, though confirmation with the fire officer is always required.

Freestanding or bed-mounted headboard: typically treated as upholstered furniture. Standard: BS 5852 Crib 5 and, for hotel projects, BS 7176 Medium Hazard.
Wall-fixed padded panel forming a headboard: may be treated as a wall surface element. Standard: BS EN 13501-1 or BS 476 Part 7, confirmed with fire officer.
Large feature wall panel extending beyond the bed: typically treated as a wall lining throughout. Standard: BS EN 13501-1 for the full panel area.
Ambiguous or mixed construction: confirm in writing with the fire officer before specifying. Where both standards may apply, test to both separately.

What to Ask Your Fabric Supplier

Before ordering fabric for a wall panel or headboard project, confirm the following with the supplier.

Has the fabric been tested to BS EN 13501-1 or BS 476 Part 7 for wall applications? If so, what Euroclass or Class was achieved? On what substrate was it tested, and what adhesive or fixing method was specified in the test? A certificate that does not specify the substrate configuration provides limited assurance.

Can the fabric be tested on the substrate configuration proposed for this project? If the supplier’s existing certificate covers a different build-up, confirm whether re-testing is available and the lead time and cost involved.

If FR treatment is required to achieve the classification needed, has the supplier arranged treatment for this fabric before? What effect does the treatment have on the pile handle and appearance? Can treated samples be provided for client approval before treatment of the full order?

If a backing or interliner is part of the proposed panel build-up, has the fabric been tested with that specific backing? Backers and interliners form part of the tested assembly and changing them may affect the classification.

Kothea Fabrics for Wall Panel and Headboard Applications

Mohair velvet from Kothea achieves Martindale rub counts of 80,000 to 100,000 and carries independently certified Crib 5 passes on the tested ranges without topical treatment. For headboard applications where BS 5852 Crib 5 is the applicable standard, the active mohair velvet ranges are suitable subject to confirmation with the fire officer. For wall panel applications requiring BS 476 Part 7 Class 1, the fabric would need to be tested in the specific composite configuration intended for the project.

Faux Leather 3 from Kothea achieves in excess of 100,000 Martindale rubs with a Crib 5 fire rating and a wipe-clean surface. It is suitable for headboards where BS 5852 is the applicable standard and is practical for hotel bedroom headboards where cleaning compatibility is a consideration. As a coated fabric it is acoustically reflective and is not suitable as the face of an acoustic wall panel.

For any wall panel or headboard project requiring specific fire certification, contact Kothea to discuss the certification status of the relevant ranges and the testing options available.

Frequently Asked Questions

What fire standard applies to fabric on walls in a commercial building?

Fabric fixed to walls in commercial buildings in the UK must meet the surface spread of flame standard BS 476 Part 7, with Class 1 required for most internal wall and ceiling linings under Approved Document B of the Building Regulations. In circulation areas and means of escape, Class 0 performance may be required, combining Class 1 spread of flame with compliance with the fire propagation index of BS 476 Part 6. The European equivalent classification system, BS EN 13501-1, uses different class designations and should be confirmed separately. Always confirm the specific requirement with the fire officer or building control authority for the project before specifying.

Does a Crib 5 certificate qualify fabric for use on walls?

No. BS 5852 Crib 5 is the fire standard for upholstered seating. It tests how a composite of fabric and filling responds to ignition sources placed at the junction of a seat and back. BS 476 Part 7 tests the surface spread of flame across a wall lining material under radiant heat. The two standards test different fire behaviours and are not interchangeable. A fabric with a Crib 5 certificate must be independently tested to BS 476 Part 7 in the intended wall panel configuration before it can be specified as a wall lining.

Does the substrate affect the fire classification of a fabric wall panel?

Yes, significantly. The fire classification under BS 476 Part 7 applies to the fabric as installed, including the substrate to which it is fixed and the adhesive or fixing method used. The same fabric can achieve different classifications depending on the substrate. A certificate obtained on one substrate configuration does not apply to a different substrate. Always confirm that the substrate, backing, and fixing method in the test certificate match the intended installation before specifying.

What fire standard applies to hotel bedroom headboards?

This depends on how the headboard is constructed and installed. A headboard that is freestanding or attached to the bed frame is typically treated as upholstered furniture and should meet BS 5852 Crib 5 and, for hotel projects, BS 7176 Medium Hazard. A headboard fixed directly to the wall as part of the wall surface may be treated as a wall lining requiring Class 1 surface spread of flame to BS 476 Part 7. The applicable standard should be confirmed with the fire officer before specifying. Where uncertainty exists, specifying a fabric that can be independently tested to both standards eliminates the ambiguity, though both tests are required separately.

Can velvet be used on walls in a hotel or commercial interior?

Yes, subject to achieving the required fire classification in the specific wall panel configuration. Velvet is widely used on fabric wall panels in hospitality environments and provides acoustic benefit alongside aesthetic quality. The pile surface of velvet increases combustible material at the surface and may require FR treatment to achieve Class 1 under BS 476 Part 7, depending on the fibre and construction. The fabric must be tested in its final form, as installed, with the intended substrate. Mohair velvet performs better in surface spread of flame testing than cotton or linen velvet due to the natural fire-resistant properties of mohair fibre, but all velvet wall panel applications require independent testing. A Crib 5 certificate as upholstery does not qualify any velvet for use as a wall lining.

Is fabric suitable for the face of an acoustic wall panel?

Most plain-woven fabrics including velvet are acoustically semi-transparent and are suitable as the face of an acoustic panel. The face fabric should not have a dense coating or laminate that reflects sound. Faux leather and PVC-coated fabrics are acoustically reflective and are not suitable for acoustic panels. The fire classification of the panel is determined by the composite of face fabric, core, and substrate and should be confirmed with the acoustic panel manufacturer using composite test data, rather than specifying the face fabric and core separately.

What Martindale count do I need for a fabric-covered wall panel?

Martindale rub count is a measure of abrasion resistance for upholstery fabric and is not a primary specification criterion for wall panels. Wall panels are not subject to the sustained friction of seating use and do not require the same Martindale thresholds as contract upholstery. That said, a fabric with a reasonable abrasion resistance of 20,000 rubs or above is practical for a wall panel application as it will resist minor contact, brushing, and cleaning without visible degradation. For headboards, a minimum of 25,000 rubs is appropriate. For full guidance on Martindale thresholds see our Martindale rub test guide.

For pattern matching and fabric quantity calculation on wall panel projects with large-scale repeats, see our pattern matching guide. For fabric specification at each RIBA Plan of Work stage including wall panel decisions, see our RIBA Plan of Work fabric guide.

For the surface spread of flame standard applicable to fabric wall and ceiling linings, see our BS 476 Part 7 guide.

For velvet as an acoustic treatment in home studios and music rooms, see our fabric for home studio acoustics guide.

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5 April 20267 April 2026

IMO Fire Standards for Yacht Interiors: FTP Code Part 7, 8 and MCA MGN 580

IMO Fire Standards for Yacht and Superyacht Interiors: A Guide for Interior Designers

Applicable standard: IMO 2010 FTP Code — not BS 5852 Crib 5
Upholstery: Part 8 / Curtains: Part 7 / Bedding: Part 9 — certificates are not interchangeable between parts
BS 5852 Crib 5 is not accepted as an equivalent to IMO Part 8 by classification societies or the MCA
UK flag state: MCA Large Commercial Yacht Code — topical FR treatment must comply with MGN 580

Specifying fabric for a yacht or superyacht interior is fundamentally different from specifying for a hotel or residential project. The fire safety framework at sea is governed by the International Maritime Organization, not by British Standards. A fabric with a BS 5852 Crib 5 certificate, which represents the benchmark for most UK contract upholstery, does not automatically qualify for use on a commercial vessel. The IMO and BS standards use different test methodologies and the certifications are not legally interchangeable. This guide explains the IMO fire testing framework, which standards apply to which applications onboard, how UK flag state requirements work through the MCA, and what questions to ask before specifying fabric for a marine project.

For the UK land-based fire standards referenced in comparison throughout this guide, see our complete guide to BS 5852 Crib 5.

How to Specify Fabric for a Marine Project: Fast Path

Before researching specific fabrics, confirm the answers to these questions in order. They determine which standards apply and what documentation you will need.

Is the vessel commercial, meaning used for charter or commercial purposes under LY3 or equivalent? If yes, IMO FTP Code certification is required. If no, land-based or residential standards may be sufficient, though many private owners specify to IMO standards voluntarily.

What is the application onboard? Upholstered seating and sofas require IMO FTP Code Part 8. Curtains and vertically hanging textiles require Part 7. Bedding components require Part 9. A certificate for one part does not substitute for another.

Is the fabric inherently fire resistant or does it require topical treatment? Inherently fire-resistant fabrics proceed directly to certification verification. Topically treated fabrics require confirmation of the treatment route, including whether the treatment provider operates under MCA-recognised procedures for UK-flagged vessels.

What foam will be used in the installation? The IMO Part 8 certificate is valid only for the specific fabric and filling combination tested. Confirm foam compatibility with the test certificate before ordering fabric.

What are the UV exposure conditions and cleaning regime onboard? These determine the light fastness grade required and whether the fabric’s cleaning code is compatible with the vessel’s maintenance routine.

IMO Compliance Sits in the Assembly, Not the Fabric

The single most important principle in marine fabric specification is this. IMO compliance does not sit in the fabric alone. It sits in the tested assembly of fabric, filling, and construction as they will be installed on the vessel. A fabric is not “IMO compliant” in isolation. It is compliant when tested as part of a specific configuration.

The practical consequence is that a certificate obtained by a fabric manufacturer for their standard foam configuration may not cover the project’s foam. If the foam specified by the upholsterer or the shipyard differs from the foam used in the test, the certificate does not apply. You must either use the foam specified in the certificate or commission new testing with the intended foam.

This is the most common source of certification problems on yacht projects and the point most frequently misunderstood by designers coming to marine specification from land-based contract work.

Common Failure Points in Marine Fabric Specification

The following failures occur regularly on yacht and superyacht projects and are largely preventable with the right questions asked at the right time.

Fabric approved to BS standards rejected by classification society. A designer specifies a fabric with a BS 5852 Crib 5 certificate, assuming it satisfies the fire requirement. The classification society requires IMO FTP Code Part 8. The fabric may well pass if tested, but it must be tested independently to the IMO standard. The project is delayed while the fabric is re-tested.

Certificate invalid because the project foam differs from the test foam. The fabric holds an IMO Part 8 certificate, but the certificate was obtained using a standard foam the manufacturer supplies. The shipyard uses a different foam. The certificate does not cover the actual installation. New testing is required at late stage in the project.

FR treatment rejected because the provider is not recognised under MGN 580. A fabric requires topical treatment for a UK-flagged commercial yacht. The treatment is carried out by a provider experienced in land-based contract work but not operating under MCA-recognised procedures. The classification society does not accept the treatment documentation. The fabric must be re-treated or replaced.

Curtain fabric passes BS 5867 but is rejected under IMO Part 7. The designer has specified curtain fabrics with full BS 5867 Part 2 Type B certification. The standards are not interchangeable. The curtain fabric must be tested to IMO Part 7 before it can be accepted.

Light fastness not specified. Fabric is installed in a sun-exposed saloon on a Mediterranean charter yacht. Within one season, fading is visible. The designer specified for fire and durability but did not confirm the light fastness grade. The fabric was grade 4, insufficient for sustained UV exposure at sea.

S-coded fabric specified for a charter vessel. A velvet with a solvent-only cleaning code is installed in a high-use saloon. The charter cleaning team uses water-based products as standard. The fabric watermarks and the pile distorts within the first charter season. There is no dry-cleaning service available at the vessel’s typical berth locations.

Responsibility in a Marine Project

Marine specification involves a chain of responsibility that is different from land-based contract work. Understanding who approves what prevents misunderstandings about which party is accountable for compliance.

The interior designer selects materials and is responsible for requesting the correct certificates and confirming that the specification is appropriate for the intended use. The designer is not responsible for testing and cannot self-certify compliance.

The contractor or shipyard installs the materials and is responsible for ensuring that installation follows the configuration under which the materials were tested. Substituting materials without re-testing invalidates the certificate.

The classification society reviews documentation and approves compliance. The classification society’s approval is the operative confirmation that the vessel meets the required standard. A supplier’s claim of compliance, or a designer’s belief that a material is suitable, does not substitute for classification society approval.

The flag state authority, which for UK and Red Ensign Group flagged vessels is the MCA, enforces the regulation and can require inspection at any time. Final responsibility for the vessel’s compliance sits with the flag state and the vessel owner, not the designer or supplier.

Which Vessels Require IMO Fire Certification

The IMO’s fire safety requirements apply to international commercial ships under the International Convention for the Safety of Life at Sea (SOLAS). In practice, the framework extends to large commercial yachts and superyachts used for charter or commercial purposes, as well as passenger vessels and cruise ships.

In the United Kingdom, the relevant regulatory authority is the Maritime and Coastguard Agency (MCA). Under the MCA Large Commercial Yacht Code (LY3), vessels of 24 metres in length and above used for commercial purposes, including charter, must comply with fire safety requirements through the LY3 code and the applicable classification society, with those requirements referencing the IMO Fire Test Procedures Code. Similar requirements generally apply across Red Ensign Group registries under equivalent yacht codes, though the specific provisions of individual registries such as the Cayman Islands or Isle of Man should be confirmed separately for any project outside direct MCA jurisdiction.

Private yachts not used for commercial purposes are not subject to the same mandatory requirements, though many owners and designers specify to IMO standards voluntarily for safety and resale value reasons. When in doubt about whether a specific vessel falls within scope, the classification society managing the vessel’s certification or the flag state authority should be consulted before specifying fabric.

The IMO 2010 FTP Code

The IMO 2010 Fire Test Procedures Code, adopted by Resolution MSC.307(88), is the definitive framework for fire testing of materials used on international vessels. It replaced the earlier 1996 FTP Code and has been mandatory for new vessels since 2012. The code comprises eleven parts, each covering a specific type of material or application.

For interior designers specifying soft furnishing fabrics, three parts are directly relevant. Part 7 governs vertically suspended textiles and films, which covers curtains, drapes, and hanging textiles. Part 8 governs upholstered furniture, which covers seating, sofas, and upholstered panels. Part 9 governs bedding components, which covers mattresses, pillows, blankets, and bedspreads. Each part uses different ignition sources and pass criteria. A certificate for one part does not confer compliance with another. A fabric certified to Part 7 for curtains is not automatically certified for use as upholstery under Part 8.

IMO FTP Code Part 8: Upholstered Furniture

Part 8 is the most relevant standard for interior designers specifying seating, sofas, headboards, and any upholstered surface on a commercial vessel. The test assesses whether a fabric and filling composite resists ignition and flame propagation when exposed to the ignition sources most likely to occur onboard.

The test uses two ignition sources applied to a test rig assembled from the actual cover fabric and filling materials to be used in the finished piece. The cigarette test places a lit cigarette at the junction between the seat and the back of the test assembly. The assembly must show no progressive smouldering after one hour. The burner tube test applies a propane flame for 20 seconds at the same junction. No flaming or progressive smouldering is permitted to continue for more than 120 seconds after the flame is removed.

The test is a composite test. The cover fabric and the filling foam must both be present and both must be the materials that will actually be used in the finished installation. A certificate issued for a specific fabric over a specific foam is valid only for that combination. If the foam specification changes, the certificate is no longer valid for the new assembly.

Where topical FR treatment has been applied to a fabric before testing, Part 8 may require pre-conditioning including repeated cleaning cycles, particularly for topically treated fabrics. This is more demanding than the pre-conditioning used in many land-based standards, and it means that a topically treated fabric must demonstrate that its FR properties survive the cleaning conditions used onboard the vessel.

IMO FTP Code Part 7: Vertically Supported Textiles

Part 7 applies to curtains, drapes, and any other fabric suspended vertically onboard a vessel. The test involves two ignition modes applied to a vertically suspended fabric specimen: a surface ignition with a propane flame applied perpendicular to the fabric surface for five seconds, and an edge ignition with the flame applied to the bottom edge of the fabric for fifteen seconds.

To pass, the fabric must not show an afterflame time greater than five seconds, must not burn through to any edge of the specimen, must not ignite cotton wool placed below the specimen to catch flaming droplets, must not exhibit an average char length exceeding 150mm, and must not show a surface flash propagating more than 100mm from the ignition point.

Part 7 is the maritime equivalent of BS 5867 Part 2 Type B for land-based contract curtains. The test principles are similar but the standards are not legally interchangeable. A BS 5867 certificate does not satisfy the IMO Part 7 requirement.

IMO FTP Code Part 9: Bedding Components

Part 9 covers mattresses, pillows, blankets, quilts, and bedspreads on commercial vessels. The test uses a cigarette ignition source and a propane flame applied to the bedding assembly. No progressive smouldering or flaming ignition is permitted. This standard is relevant for yacht designers specifying guest cabin bedding on commercial charter vessels.

BS 5852 Crib 5 and IMO Part 8: Not Interchangeable

This is the most commercially significant point in the guide. BS 5852 Crib 5 and IMO FTP Code Part 8 are not legally interchangeable standards. A fabric with a full BS 5852 Crib 5 certificate, regardless of how stringent that test is, cannot be used on a commercial vessel in place of an IMO Part 8 certificate. Classification societies and the MCA explicitly do not accept BS or EN standards as alternatives to IMO certification for vessels within scope.

The technical reason is that the two tests use different ignition sources, different test rigs, different pass criteria, and different pre-conditioning requirements. The IMO Part 8 test does not include the large wooden crib ignition source used in Crib 5. It uses a cigarette and a propane flame. The Crib 5 crib uses a larger ignition source, but the tests are not directly comparable in terms of severity — they assess different aspects of fire behaviour in different configurations. What matters is that the legal basis for each standard is entirely separate.

If a fabric has been tested to BS 5852 Crib 5 for land-based contract use, it must be independently tested to IMO FTP Code Part 8 for marine commercial use. The same fabric may well pass both, but it must be tested to both to hold both certificates.

The MCA Large Commercial Yacht Code and MGN 580

For UK-flagged and Red Ensign Group vessels under the MCA Large Commercial Yacht Code, the relevant guidance is Marine Guidance Note 580 (MGN 580), which governs the equivalence of topical FR treatment to inherently fire-retardant materials onboard these vessels.

The practical implication of MGN 580 is as follows. Where a fabric is not inherently fire retardant, the topical FR treatment must be applied and certified in accordance with MCA-recognised procedures, typically involving approved or verified treatment providers overseen by a recognised organisation or classification society. The treatment must be tested to the relevant parts of the 2010 IMO FTP Code, including the pre-conditioning requirements. Treatment carried out without recognition under MGN 580, or tested to BS or EN standards rather than IMO standards, is not accepted as compliant.

Inherently fire-retardant materials, meaning fabrics whose fire resistance is a property of the fibre rather than an applied coating, must comply with the relevant 2010 IMO FTP Code standards directly, without the additional treatment approval requirement. This is a significant practical advantage for inherently fire-resistant fabrics on marine projects.

BS and EN standards, including BS 5852 Crib 5, are not accepted as equivalents for compliance with IMO requirements for vessels within the scope of MGN 580. This has been the case since the original MCA guidance came into effect in 2012 and was reinforced by the MGN 580 amendment effective from January 2020.

Inherent vs Topical FR for Marine Projects

The distinction between inherent and topical fire resistance carries greater practical weight in marine specification than in land-based contract work, for three reasons.

First, the pre-conditioning requirement. IMO Part 8 requires ten full cleaning cycles before fire testing of topically treated fabrics. A fabric whose treatment begins to degrade after several cleaning cycles may pass the test at the point of certification but perform less well in service on a vessel where cleaning is frequent. An inherently fire-resistant fabric is not subject to the same degradation risk through cleaning.

Second, the treatment supply chain. MGN 580 requires that topical FR treatment is applied by an MCA-approved provider. The number of such approved providers in the UK is limited. Specifying an inherently fire-resistant fabric removes the requirement to source and commission an approved treatment provider and reduces the risk of certification delays.

Third, the documentation chain. Marine projects operated by classification societies involve rigorous documentation review. An inherently certified fabric with a single clear test certificate is simpler to document than a topically treated fabric requiring a Declaration of Conformity from the treatment provider alongside the test certificate from an IMO-approved laboratory.

Marine Environmental Considerations Beyond Fire

Fire certification is the primary regulatory requirement for marine fabric specification, but the marine environment introduces additional performance considerations that do not arise in land-based contract work.

UV exposure. A superyacht in the Mediterranean or Caribbean receives sustained, intense UV exposure, particularly in deck-level saloons and cockpit areas with large glazed panels. Upholstery fabrics in these locations need a light fastness grade of at least 6 to ISO 105-B02, and specialist outdoor-rated fabrics should be considered for any semi-outdoor or cockpit application. For full guidance on light fastness grades, see our light fastness and Blue Wool Scale guide.

Deck and cockpit fabric: solution-dyed acrylic. For fully exposed deck-level seating, cockpit cushions, and flybridge upholstery, solution-dyed acrylic is the standard specification. The dye is incorporated into the fibre during extrusion rather than applied to the surface, producing light fastness grades of 7 to 8 to ISO 105-B02 that interior upholstery fabrics cannot match. Solution-dyed acrylic is also water-repellent, mould and mildew resistant, and dimensionally stable under repeated wetting and drying — essential properties for fabric exposed to salt spray, rain, and constant humidity variation. For covered deck areas and enclosed cockpits where direct weathering is reduced, outdoor-rated faux leather offers a more premium aesthetic alongside comparable UV and moisture resistance. For the full specification of outdoor and semi-outdoor fabric applications including the parallel requirements for hotel terraces, see our outdoor terrace and semi-outdoor fabric guide.

Salt air and humidity. The marine environment accelerates degradation of certain fabric finishes and dye systems. Salt air can cause colour shift in some fabrics over time. High humidity below deck creates conditions that can encourage mould growth on natural-fibre fabrics if ventilation is inadequate. Synthetic fabrics and PVC or PU faux leathers are generally more resistant to these conditions than natural-fibre upholstery fabrics.

Cleaning agents. Vessels in charter service use commercial cleaning products that may be more aggressive than standard hotel housekeeping products. Confirm the cleaning regime with the captain or vessel manager before specifying and ensure the fabric’s cleaning code is compatible. Fabrics coded S, meaning solvent-only cleaning, can be difficult to maintain in a charter environment where professional dry cleaning services are not always accessible.

Weight and drape. In sailing yachts, fabric weight can occasionally be a minor consideration for curtains and lightweight furnishings, primarily for racing or performance sailing vessels rather than large motor yachts or superyachts where this is rarely a practical factor.

What to Ask Your Fabric Supplier

When specifying for a commercial marine project, ask the following questions of any fabric supplier before ordering samples.

Does the fabric hold an IMO FTP Code Part 8 certificate for upholstered furniture? If so, which foam was used in the test, and is that foam available for the project? If the certificate was obtained with a specific foam that is not available or not appropriate for the project, the certificate may not cover the actual installation.

For curtain fabrics, does the fabric hold an IMO FTP Code Part 7 certificate? If it requires treatment, is the treatment provider MCA-approved under MGN 580 for UK-flagged vessels?

Is the fabric inherently fire resistant or does it require topical treatment? If it requires topical treatment, is there an MCA-approved treatment provider available, and what is the lead time for treatment and certification?

What is the fabric’s light fastness grade to ISO 105-B02? For use in sun-exposed areas on a superyacht, this is as important as the fire certificate.

What cleaning code does the fabric carry and is it compatible with the cleaning products used on the vessel?

Kothea Fabrics for Marine Applications

Kothea’s Faux Leather 3 (a high-specification PVC leather — for a full comparison of PVC, PU and silicone leather types see our faux leather types compared guide) achieves in excess of 100,000 Martindale rubs with a Crib 5 fire rating and a wipe-clean surface compatible with marine cleaning regimes. Its PVC-based construction offers good resistance to humidity and salt air. For commercial marine projects requiring IMO Part 8 certification, the fabric would need to be independently tested to that standard with the specific foam to be used in the installation. Contact Kothea to discuss this requirement for a specific project.

Mohair velvet from Kothea achieves Martindale rub counts of 80,000 to 100,000 — for guidance on rub count requirements see our Martindale rub test guide — and carries independently certified Crib 5 passes achieved without topical treatment on the tested ranges. For private yacht use where IMO certification is not a mandatory requirement, mohair velvet is an appropriate specification for interior saloon seating. For commercial vessels requiring IMO Part 8 certification, independent testing to the IMO standard with the specific foam to be used would be required.

For any marine project with specific IMO certification requirements, contact Kothea to discuss the certification status and testing options for the relevant ranges before specifying.

Frequently Asked Questions

Does BS 5852 Crib 5 certification qualify a fabric for use on a commercial yacht?

No. BS 5852 Crib 5 and IMO FTP Code Part 8 are separate standards with different test methodologies and different legal bases. Classification societies and the MCA do not accept BS 5852 as an equivalent to IMO FTP Code Part 8 for vessels within the scope of SOLAS or the MCA Large Commercial Yacht Code. A fabric specified for commercial marine use must hold an independent IMO FTP Code Part 8 certificate obtained from an IMO-approved laboratory. A Crib 5 certificate from land-based contract testing does not substitute for this.

What is the IMO FTP Code Part 8 test for upholstered furniture?

IMO FTP Code Part 8 tests upholstered furniture assembled from the actual cover fabric and filling to be used in the finished piece. Two ignition sources are applied at the junction between the seat and the backrest: a smouldering cigarette, after which no progressive smouldering is permitted after one hour, and a propane burner flame applied for 20 seconds, after which no flaming or progressive smouldering is permitted for more than 120 seconds. Where the fabric has been topically treated with FR chemicals, the assembly must undergo ten full cleaning cycles before the fire test is conducted. The certificate is valid only for the specific fabric and filling combination tested.

What is MGN 580 and when does it apply?

MGN 580 is a Marine Guidance Note issued by the Maritime and Coastguard Agency that governs topical FR treatment as an equivalent to inherently fire-retardant materials on UK and Red Ensign Group flagged vessels certified under the MCA Large Commercial Yacht Code. It requires that FR treatment is applied by an MCA-approved treatment provider monitored by a Notified Body, and that the treatment is tested to the relevant parts of the 2010 IMO FTP Code. BS and EN standards are explicitly not accepted as equivalents under MGN 580. It has applied since 2012 and was updated by amendment effective January 2020.

Does a curtain fabric certified to BS 5867 qualify for marine use?

No. BS 5867 Part 2 Type B is the UK land-based standard for contract curtains. IMO FTP Code Part 7 is the marine equivalent for vertically suspended textiles. The test principles are broadly similar but the standards are not legally interchangeable. A curtain fabric for a commercial vessel must hold an IMO FTP Code Part 7 certificate from an IMO-approved laboratory.

Is mohair velvet suitable for yacht interiors?

For private yachts where IMO certification is not a mandatory requirement, mohair velvet is suitable for interior saloon seating and is a common specification choice in superyacht design. Its durability of 80,000 to 100,000 Martindale rubs, natural fire-resistant properties, and aesthetic qualities make it well suited to high-end marine interiors. For commercial charter vessels requiring IMO FTP Code Part 8 certification, independent testing to the IMO standard with the specific foam to be used in the installation would be required. Confirm the certification requirement with the flag state authority or classification society before specifying.

What light fastness grade should I specify for a superyacht in the Mediterranean?

For interior saloon areas with large glazed panels and significant sun exposure, specify a minimum of ISO 105-B02 grade 6. For semi-outdoor or cockpit seating areas, specify grade 7 to 8 and use specialist outdoor-rated fabrics rather than standard interior upholstery fabric. Superyachts in Mediterranean and Caribbean deployment receive sustained and intense UV exposure, and the light fastness specification is as commercially significant as the fire certification for fabric longevity. For full guidance see our light fastness guide.

What is the difference between IMO Part 7, Part 8, and Part 9?

IMO FTP Code Part 7 applies to vertically suspended textiles such as curtains and drapes. Part 8 applies to upholstered furniture including seating, sofas, and upholstered panels. Part 9 applies to bedding components including mattresses, pillows, and blankets. Each part uses different ignition sources and pass criteria. A certificate for one part does not confer compliance with another. A fabric must be tested independently under each part applicable to its intended use onboard the vessel.

For hotel and hospitality fabric specification, see our hotel fabric specification guide.

For guidance on which fabrics are unsuitable for outdoor and semi-outdoor environments including yacht deck areas, see our when not to use velvet guide.

A downloadable yacht interior fabric specification checklist is available as a PDF: Yacht Interior Fabric Specification Checklist (PDF).

For the surface spread of flame standard applicable to wall lining materials, see our BS 476 Part 7 guide.

For hotel terrace and semi-outdoor fabric specification — covering the same fabric types used in yacht deck applications — see our outdoor terrace fabric specification guide.

To discuss fabric specification for a yacht or marine project, contact Kothea directly.

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Hotel Fabric Specification Guide: Martindale, Crib 5, Cleaning and Dye Lots

How to Specify Fabric for Hotel and Hospitality Projects: A Complete Guide for Interior Designers

Minimum Martindale: 40,000 rubs (bedroom) / 60,000 rubs (restaurant and bar) / 80,000–100,000 rubs (lobby)
Fire standard: BS 7176 Medium Hazard — not just Crib 5
Cleaning code: W or WS preferred — S-coded fabrics are often incompatible with hotel housekeeping
Download: Hotel fabric specification checklist (PDF)

Hotel fabric specification is categorically different from residential work. The same fabric that performs well in a client’s drawing room will fail visibly within months in a hotel bedroom. The difference is not only the volume of use but the nature of that use: guests treat hotel furniture differently from their own, housekeeping applies chemicals that residential cleaning never encounters, and the fire authority expects documentation that a residential project never requires. This guide covers every dimension of hotel fabric specification, from Martindale thresholds by room type to dye lot consistency across multi-phase projects.

For the testing standards referenced throughout this guide, see our posts on the Martindale rub test, BS 5852 Crib 5 fire certification, light fastness and the Blue Wool Scale, fabric care symbols and cleaning codes, and velvet types compared.

Understand the Project Before Specifying Any Fabric

Before selecting a fabric, confirm the following with the client or project manager. The answers determine every specification decision that follows.

Brand tier and refurbishment cycle. A budget hotel expecting to refurbish every five years has different durability requirements from a five-star property projecting a ten-year lifecycle. The longer the expected service life, the higher the Martindale threshold should be.

Occupancy pattern. A hotel running at 90% year-round occupancy subjects its furniture to dramatically more use than a seasonal resort. A 24-hour city-centre hotel has different requirements from a boutique property with a primarily weekend leisure clientele.

Housekeeping regime. Ask what cleaning products are used on upholstered surfaces. Many hotels use alkaline-based multi-purpose cleaners across all surfaces. These are effective at removing soiling but can degrade the back-coating on topically treated fabrics over time. If the housekeeping contractor uses a standard alkaline spray on upholstered chairs, specify fabrics with a W or WS cleaning code, or confirm that the specific fabric survives the cleaning agent in use. Solvent-coded fabrics coded S require specialist in-situ cleaning and are not compatible with standard hotel housekeeping routines unless a specialist cleaning contract is in place.

Fire risk assessment category. Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person for the building must carry out a fire risk assessment and procure furnishings accordingly. For most hotel environments the relevant standard is BS 7176 Medium Hazard. Confirm the specific hazard category with the fire officer or the client’s fire safety consultant before specifying.

Project phasing. A hotel refurbished in phases over two to three years will need fabric from the same dye lot across phases, or a supplier able to replicate the colourway in future batches. This is the most frequently overlooked risk in large hotel projects and the one most likely to create a visible inconsistency across rooms completed at different times.

Martindale Thresholds by Room Type

No single Martindale figure applies across an entire hotel. Different areas have different use intensities and the fabric specification should reflect this. These thresholds are industry guidelines rather than formal standards and should be adjusted based on fibre type, construction, and project conditions. The following figures represent the minimum acceptable for each area in a standard UK hotel. For premium properties with longer refurbishment cycles, specify 20,000 to 30,000 rubs above each figure.

Hotel bedroom: desk chair, occasional chair, chaise. Minimum 40,000 Martindale rubs. Guest bedrooms receive regular but not continuous use. A single bedroom chair may be sat in by two guests per night at occupancy, which is low by contract standards but higher than a comparable chair in a private home. 40,000 rubs provides adequate headroom for a five-year refurbishment cycle at typical occupancy.

Hotel bedroom: headboard. Minimum 25,000 Martindale rubs. Headboards are subject to contact rather than seated abrasion. Hair products, moisturisers, and leaning are the primary wear factors. A fabric with good abrasion resistance at 25,000 rubs and a stain-resistant finish is appropriate for most hotel bedroom headboards. For boutique hotels expecting a longer first-refurbishment interval, specify 40,000 rubs. See the headboard section below for fire rating considerations specific to this application.

Restaurant and dining seating. Minimum 60,000 Martindale rubs. Restaurant seating in a busy hotel receives sustained use from breakfast through dinner service, often with multiple seatings per day. Food and beverage spills are frequent. The fabric must combine high abrasion resistance with good stain resistance and a cleaning code compatible with damp wiping between services. High-performance faux leather, often tested to 100,000 or more Martindale rubs or equivalent methods, is one of the most practical specifications for high-volume restaurant seating. For properties where aesthetics require a woven fabric, specify a minimum of 60,000 rubs with a stain-resistant finish.

Bar and lounge seating. Minimum 60,000 Martindale rubs. Bar seating receives the most demanding use of any upholstered surface in a hotel. Guests sit for extended periods, often in close-fitting clothing that generates sustained friction, and spills involving alcoholic beverages are common. For bar stools and high-seat bar chairs where the seating surface is under direct and continuous pressure, 80,000 rubs is a more defensible specification. Alcohol can also degrade certain topical fabric finishes, which is a reason to favour inherently resistant fabrics or faux leather in bar applications.

Hotel lobby seating. Minimum 60,000 to 100,000 Martindale rubs depending on the lobby’s function. A lobby used primarily as a transit space with limited seating use can be specified at 60,000 rubs. A lobby that doubles as a working space, café, or meeting point and receives continuous use throughout the day requires 80,000 to 100,000 rubs. Lobby furniture is also highly visible and first-impressions critical, which means early visible wear is commercially significant regardless of actual structural failure.

Meeting room and event space seating. Minimum 40,000 Martindale rubs. Meeting room chairs receive intense but intermittent use. A conference chair may be occupied for six to eight hours during a full-day event and then unused for days. 40,000 rubs is sufficient for most meeting room applications. For chairs used in training rooms or learning environments with continuous daily occupation, specify 60,000 rubs.

Spa and wellness seating. Minimum 40,000 Martindale rubs, with additional consideration of moisture and skincare product resistance. Guests using spa facilities arrive in robes or swimwear, and skincare products including oils and lotions come into contact with seating surfaces. Specify fabrics whose cleaning code permits water-based cleaning and confirm compatibility with the specific products used in the spa. Faux leather is often the most practical choice for spa seating.

Fire Rating for Hotel Environments

The fire standard for most UK hotel upholstery is BS 7176 Medium Hazard. This standard incorporates BS 5852 Crib 5 and additionally requires the cigarette and match tests and a water-soak test to simulate cleaning. The specification document must state the specific foam used in the test, as BS 7176 is a composite test of fabric and filling combined, not of the fabric alone.

In practice, many fabrics that pass BS 5852 Crib 5 can be used to achieve BS 7176 Medium Hazard when combined with the appropriate filling, but BS 7176 is a broader composite standard with additional requirements including cigarette, match, and water-soak testing. The difference is also in the documentation: a BS 7176 certificate names the end-use environment and the foam specification, making it a more defensible document for a contract project. For hotel upholstery, specify BS 7176 Medium Hazard rather than simply Crib 5 and request the full certificate naming the foam used in the test. Always request full test certificates rather than relying on generic compliance statements.

For mohair velvet that achieves a Crib 5 pass without topical treatment, confirm that the specific range has been independently tested to BS 5852 and request the test certificate. Where applicable, the certificate should also demonstrate compliance to BS 7176 Medium Hazard or indicate the foam configuration under which the test was conducted.

For curtains in hotel bedrooms and public areas, the applicable standard is BS 5867 Part 2 Type B, which is a separate standard from BS 5852 and governs vertically hanging fabrics. The two standards are not interchangeable. A Crib 5 certificate for an upholstery fabric does not qualify the same fabric for use as a contract curtain.

For full detail on the Crib 5 test, inherent versus topical certification, and BS 7176 hazard categories, see our complete guide to BS 5852 Crib 5.

The Hotel Cleaning Regime and What It Means for Fabric Specification

The housekeeping regime is the single most underspecified variable in hotel fabric selection. Fabrics are routinely tested in laboratory conditions, but hotel cleaning products introduce chemical stresses that standard abrasion tests do not replicate.

Standard hotel housekeeping uses multi-purpose alkaline cleaners for daily surface cleaning across guest rooms and public areas. These products, typically in the pH 8 to 11 range, are effective against the greases, body oils, and food residues that accumulate on upholstered surfaces. However, alkaline cleaners can progressively reduce the effectiveness of some topical FR treatments and may cause surface dulling or discolouration on certain pile fabrics. Cleaning codes indicate suitable cleaning methods but do not guarantee resistance to specific commercial cleaning chemicals.

The practical consequence for specification is as follows. A fabric with a topical Crib 5 treatment and a solvent-only cleaning code (S) is often incompatible with standard hotel housekeeping unless a specialist cleaning regime is in place. Cleaning codes indicate suitable methods but do not guarantee resistance to specific commercial cleaning chemicals. Prefer fabrics suitable for water-based cleaning (W or WS), or confirm compatibility with the actual cleaning products used by the hotel’s housekeeping contractor before finalising the specification. In most hotel projects, the simpler solution is to specify fabrics whose FR certification does not depend on topical treatment, or to select faux leather or other wipe-clean surfaces for high-contact areas.

Deep cleaning of upholstered furniture in hotels typically occurs two to four times per year, using specialist upholstery cleaning services. At this frequency, cumulative chemical exposure is significant over the course of a five or ten-year refurbishment cycle. When specifying a fabric for a long-lifecycle hotel project, ask the supplier to confirm the fabric’s resistance to the specific cleaning agents the hotel uses, and request confirmation in writing before finalising the specification.

Light Fastness in Hotel Environments

Hotel bedrooms present a wide range of light exposure conditions. A north-facing bedroom on the fourth floor of an urban hotel receives very little natural light. A south-facing suite on a high floor with full-height glazing may receive intense direct sunlight for much of the day. The same fabric specified throughout a hotel will perform very differently in these two environments.

For hotel bedrooms with standard glazing and mixed orientations, specify grade 5 where possible for upholstery fabrics and curtains. For south-facing bedrooms, suites with large glazed areas, and hotel lobbies with skylights, specify grade 6 or above. For glazed atriums and hotel exteriors or terraces, specify grade 7 to 8 and use specialist outdoor-rated fabrics.

Modern hotel glazing frequently incorporates low-e coating or UV-filtering film, which reduces UV transmission and can extend the effective service life of a fabric beyond what the grade alone would suggest. If the project specification includes high-performance glazing, factor this into the light fastness requirement but do not reduce the grade below 5 on that basis. Glazing specifications can change during a refurbishment and fabrics need to perform adequately under worst-case light conditions.

For full guidance on light fastness grades and what they mean by room orientation, see our guide to light fastness and the Blue Wool Scale.

Dye Lot Consistency Across Large Projects

A hotel project may specify the same fabric across 200 bedrooms, three dining areas, and a lobby, with installation spread over two to three years across multiple phases. Unless dye lot consistency is managed proactively, the rooms completed in phase one will have a subtly different colour from those completed in phase three.

Dye lot variation is a normal property of any dyed fabric. Even the same colourway produced by the same mill in the same month can show variation between rolls that is invisible side by side but visible when comparing a freshly installed chair with one installed eighteen months earlier. In a hotel where guests move between rooms, this variation is commercially significant.

The practical approach is as follows. At the point of specification, confirm with the supplier the minimum quantity that can be reserved from a single dye lot for the full project. For very large projects, request that the supplier weave the full quantity from the same yarn batch and production run where possible. Where this is not possible, establish the supplier’s tolerance standards for dye lot variation and ensure that comparison samples are retained from the first delivery for matching against subsequent deliveries.

For phased projects where new fabric cannot be reserved in advance, specify the colourway and confirm with the supplier that the range will remain in production for the duration of the project. Discontinued colourways mid-project are the most common cause of unresolvable dye lot inconsistency in hotel refurbishments.

Headboards

Hotel bedroom headboards present a specific specification challenge. The fire standard applicable to headboards is less universally agreed than for seating. BS 5852 is explicitly a test for upholstered seating. Whether a headboard, as a wall-mounted or freestanding fixed element, falls under the same seating standard or under a separate wall-covering or surface-finishing standard depends on how it is constructed and installed.

A headboard that is freestanding or attached to the bed frame and upholstered in the same way as a sofa is often treated as upholstered furniture and specified to BS 5852 Crib 5. A headboard that is fixed to the wall and forms part of the wall surface may be treated as a surface finish and be subject to BS 476 Part 7 or the surface spread of flame classification relevant to that building. Confirm with the fire officer and the hotel’s fire safety consultant which standard applies to the headboard construction specified in the project.

For Martindale specification of headboard fabric, 25,000 rubs is adequate for most hotel bedroom applications. The primary wear on a headboard is contact from hair, hair products, and leaning, rather than the sustained abrasion of seated upholstery. A stain-resistant finish is more valuable on a headboard than an elevated rub count.

Curtains in Hotel Bedrooms and Public Areas

Contract curtain fabrics in hotel bedrooms must meet BS 5867 Part 2 Type B. This is a separate standard from the upholstery fire standards and governs vertically hanging fabrics. The test involves a vertical flame applied to the hanging fabric and measures flame spread and post-flame smouldering. Type B is the standard for most hotel applications. Type C applies to NHS and healthcare environments with more frequent laundering requirements.

Most decorative curtain fabrics require topical treatment to meet BS 5867 Part 2 Type B. Some inherently fire-resistant fabrics, including certain Trevira CS constructions, meet the standard without treatment. The treatment process for curtains involves impregnation or dipping rather than back-coating, and affects different fabric types differently. Sheer and lightweight fabrics are particularly susceptible to visible changes after treatment. Confirm the suitability of the specific fabric for curtain FR treatment with the supplier before specifying.

For hotel bedrooms with south or west-facing windows, curtain light fastness requires the same attention as upholstery. A curtain fabric that faces direct afternoon sun will fade at the fold lines before the body of the fabric shows colour change, creating an irregular striped effect that is difficult to remedy without full replacement. Specify grade 6 or above for curtain fabrics in hotel bedrooms with significant sun exposure.

Kothea Fabrics for Hotel Specification

Mohair velvet from Kothea achieves Martindale rub counts of 80,000 to 100,000 across the active mohair ranges and carries independently certified Crib 5 passes achieved without topical treatment on the ranges tested. The combination of high durability and FR certification without treatment makes mohair velvet suitable for hotel bedroom seating, lobby furniture, restaurant seating at the appropriate rub count, and bar seating at the higher end of the range.

Faux Leather 3 from Kothea achieves in excess of 200,000 Martindale rubs with a Crib 5 fire rating and a wipe-clean surface. Its cleaning code is compatible with water-based hotel housekeeping products. It is suitable for restaurant seating, bar seating, spa seating, headboards, and wall panelling in hotel environments where a wipe-clean surface is required. The 140 cm width and 20-plus colourways make it practical across multiple areas within a single project.

Recline Linen from Kothea achieves 80,000 Martindale rubs and is suitable for hotel bedroom occasional chairs and low-use contract seating where a natural linen aesthetic is specified. Fire treatment is required for contract use.

For full specification data including Martindale rub counts, fire ratings, cleaning codes, and light fastness grades, see the mohair velvet upholstery page, the faux leather upholstery page, and the upholstery linen page.

Frequently Asked Questions

What Martindale rub count do I need for hotel upholstery?

For hotel bedroom chairs and occasional seating, specify a minimum of 40,000 Martindale rubs. For restaurant and bar seating, specify a minimum of 60,000 rubs, with 80,000 rubs preferred for high-volume bar seating. For hotel lobby seating in continuous use throughout the day, specify 80,000 to 100,000 rubs. For hotel bedroom headboards, 25,000 rubs is the minimum with a stain-resistant finish. These figures are minimums for a standard five-year refurbishment cycle. For premium properties with a ten-year cycle, add 20,000 to 30,000 rubs to each threshold. For full guidance on the Martindale rub test and how rub counts translate to classification, see our Martindale rub test guide.

What fire standard applies to hotel upholstery in the UK?

For most UK hotel environments, the applicable standard is BS 7176 Medium Hazard, which incorporates BS 5852 Crib 5 plus the cigarette and match tests and a water-soak stage. The certificate must document the specific foam used in the test, as BS 7176 is a composite test of fabric and filling together. Specifying BS 7176 Medium Hazard rather than simply Crib 5 provides a more complete and defensible specification for contract hotel projects. Confirm the specific hazard category with the fire officer for the project. For curtains in hotel bedrooms, the applicable standard is BS 5867 Part 2 Type B, which is a separate standard from BS 5852.

Can velvet be used in hotel bedrooms?

Yes. Mohair velvet with a Martindale rub count of 80,000 or above and an independently certified Crib 5 pass achieved without topical treatment is suitable for hotel bedroom seating. The practical limitation is the cleaning code. Most mohair velvet is coded S, meaning solvent-based dry cleaning only, which is not compatible with standard hotel housekeeping routines that use water-based or alkaline cleaners. If the hotel’s housekeeping contractor applies water-based products to upholstered surfaces as routine, a fabric coded W or WS should be specified instead, or a specialist cleaning contract for velvet surfaces must be established in advance.

What is the difference between BS 5852 Crib 5 and BS 7176 for hotel furniture?

BS 5852 Crib 5 is the test method for ignition source 5. BS 7176 is the specification standard for non-domestic upholstered seating that references BS 5852 and additionally requires the cigarette and match stages, the water-soak procedure, and documentation of the specific end-use environment and foam configuration. Similar FR approaches are often used to meet both standards, but BS 7176 certification depends on the full upholstery system including the filling, not the fabric alone. A BS 7176 Medium Hazard certificate is the correct standard to specify for most UK hospitality environments.

How do I manage dye lot consistency on a phased hotel project?

Reserve the full project quantity from a single dye lot at the point of specification, or request that the supplier weave the full quantity from the same yarn batch in a single production run. For projects where this is not possible, retain comparison samples from the first delivery and establish the supplier’s tolerance standards for dye lot variation. For phased projects with undetermined future phases, confirm that the colourway will remain in production for the duration of the project. Discontinued colourways mid-project are the most common source of unresolvable dye lot inconsistency in hotel refurbishments.

Is faux leather suitable for hotel restaurant seating?

Yes. Faux leather is one of the most practical fabrics for hotel restaurant seating. A high-specification PVC faux leather achieving in excess of 200,000 Martindale rubs with a Crib 5 fire rating and a wipe-clean surface is compatible with the cleaning regimes used between restaurant services, resists food and beverage spills, and requires no specialist cleaning contract. The cleaning code of W or WS makes it straightforward for housekeeping staff to maintain. The aesthetic limitation is that faux leather does not replicate the warmth and texture of natural upholstery fabrics, which may not suit the positioning of certain hotel restaurants.

What light fastness grade do I need for hotel bedroom curtains?

For hotel bedroom curtains in rooms with mixed orientations, specify a minimum of ISO 105-B02 grade 5. For south or west-facing bedrooms, suites with large glazed areas, or any bedroom where afternoon sun falls directly on the curtain face, specify grade 6 or above. Curtain fabrics are particularly vulnerable to fading at fold lines, which creates an irregular striped effect before the body of the fabric shows colour change. This is commercially significant in a hotel where curtains are highly visible to guests. For full guidance on light fastness grades and room orientation, see our light fastness guide.

Does hotel housekeeping damage upholstery fabric?

Standard hotel housekeeping cleaning products, typically alkaline-based multi-purpose cleaners, can degrade topical FR treatments on upholstery fabrics over time and may cause surface dulling on certain pile fabrics if applied incorrectly. The risk is greatest with fabrics that have a solvent-only cleaning code (S), as water-based products applied by housekeeping staff will eventually compromise both the fabric surface and any chemical FR coating. To avoid this, specify fabrics with a W or WS cleaning code for hotel bedroom and public area upholstery, or ensure that a specialist cleaning contract is in place for any S-coded fabric specified in the project.

Download the Hotel Fabric Specification Checklist (PDF) — a printable one-page reference covering Martindale thresholds by room type, fire compliance, cleaning compatibility, dye lot strategy, and documentation sign-off.

For hotel and hospitality fabric specification, see our hotel fabric specification guide.

For mohair velvet thermal and moisture management properties in hospitality, see our mohair thermal properties guide. For healthcare fabric specification, see our healthcare fabric guide. For fabric decisions at each RIBA Plan of Work stage, see our RIBA Plan of Work fabric guide.

For the Building Safety Act 2022 and fabric documentation requirements in higher-risk buildings, see our Building Safety Act and fabric specification guide.

For fabric specification for hotel terraces and semi-outdoor hospitality spaces, see our outdoor terrace fabric specification guide.

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5 April 202611 April 2026

Velvet Types Compared: Mohair, Cotton, Silk, Linen and Synthetic

Velvet Types Compared: A Complete Specifier’s Guide for Interior Designers and Architects

Most durable natural velvet: Mohair — 80,000 to 100,000 Martindale rubs
Contract fire standard: BS 5852 Crib 5 — inherent in correctly certified mohair; topical treatment required for cotton, linen, and silk
Cleaning code: S (solvent only) for most natural velvets; W or WS for synthetic
Decorative use only: Silk velvet and cashmere velvet — not suitable for upholstery in regular use

Velvet is a construction method, not a fibre. A velvet fabric is produced by weaving two layers of cloth simultaneously with threads connecting them, then cutting those threads to create an upstanding pile. That pile can be made from almost any fibre, and the fibre is the primary determinant of specification performance — durability, fire rating, cleaning requirements, light fastness, and cost — alongside construction, pile density, and backing. Choosing between velvet types on aesthetic grounds alone is the most common specification error in interior design.

This guide compares the principal velvet types available to specifiers in the UK market across every dimension relevant to a professional specification. For background on the testing standards referenced throughout this guide, see our posts on the Martindale rub test, BS 5852 Crib 5 fire certification, light fastness and the Blue Wool Scale, and fabric care symbols and cleaning codes.

How Velvet Is Made

Understanding the construction helps explain why fibre choice matters so much in velvet. In warp pile velvet, the pile yarns run along the length of the fabric and are woven over wires or rods. When the rods are withdrawn and the loops cut, a cut pile is formed. In double-cloth velvet, two fabrics are woven face to face simultaneously, joined by pile threads that are then cut to separate them and create pile on both faces. The resulting fabric has a distinct face and back, with the pile standing perpendicular to the base cloth.

The density and height of the pile, the twist of the pile yarn, and the weight and construction of the base cloth all affect performance. But the most fundamental variable is the fibre from which the pile is made.

Mohair Velvet

Fibre origin: Hair of the Angora goat, primarily from South Africa and Turkey. South Africa produces more than half of the world’s mohair supply and is the global benchmark for quality. A long-staple, smooth, lustrous fibre with exceptional tensile strength. For background on South African mohair production and the Responsible Mohair Standard, see Mohair South Africa.

Martindale rub count: 80,000 to 100,000 and above, depending on construction and pile density. Mohair velvet achieves the highest rub counts of any natural-fibre velvet and is the most reliably suitable natural-fibre velvet for heavy contract use. Kothea’s mohair velvet ranges are independently tested and achieve between 80,000 and 100,000 Martindale rubs across the active collections.

Fire rating: Mohair fibre, like wool, has natural flame-resistant properties arising from its high protein content. A correctly woven and constructed mohair velvet can achieve a BS 5852 Crib 5 pass without topical chemical treatment, depending on construction and backing. This is not universal across all mohair velvets and must be confirmed by an independent test certificate for the specific range. Kothea’s active mohair velvet ranges carry independently certified Crib 5 passes without topical treatment. Where this is confirmed, the certification does not depend on chemical coatings, is unaffected by cleaning, and does not alter the handle or appearance of the fabric. This is the single most commercially significant advantage of a correctly certified mohair velvet over other natural-fibre velvets.

Cleaning code: S. Dry-cleaning solvent only. Water applied to mohair velvet can cause watermarks and pile matting. For minor fresh stains, a barely dampened lint-free cloth worked in the direction of the pile is acceptable as a first response. For full cleaning guidance see our post on cleaning and maintaining mohair velvet.

Light fastness: ISO 105-B02 grade 4 to 5 in light colourways and grade 5 to 6 in dark colourways. Suitable for most residential environments. For south-facing rooms, specify dark colourways or confirm the specific colourway grade with the supplier.

Pile appearance: High lustre with a characteristic directional sheen. The pile reflects light differently depending on viewing angle and pile direction, producing the depth of colour associated with luxury upholstery velvet. The sheen is a natural property of the mohair fibre and cannot be replicated by cotton or synthetic alternatives.

Suitable applications: Heavy contract upholstery including hotel seating, restaurant banquettes, theatre and hospitality seating, residential sofas and chairs, headboards, cushions, and curtains. The combination of inherent Crib 5 and high Martindale makes it the standard against which all other upholstery velvets are measured in the UK contract market.

Not recommended for: High-light environments without confirming the colourway grade. Outdoor or semi-outdoor use. Applications requiring machine washing.

Cost position: Premium. The Angora goat produces a limited annual clip, and the fibre must be woven to a high pile density to achieve the rub counts associated with contract performance. The cost is justified by the specification advantage of inherent Crib 5 and the durability of the fabric in use.

Cotton Velvet

Fibre origin: Cotton plant. A short-staple natural cellulose fibre, widely grown and relatively inexpensive.

Martindale rub count: 20,000 to 60,000 depending on construction, pile density, and backing. Cotton velvet varies enormously in quality. A well-constructed heavyweight cotton velvet can achieve sufficient durability for general domestic and light contract use. A thin, loosely woven cotton velvet intended for curtains or cushions may achieve 10,000 rubs or fewer. Always confirm the specific Martindale figure for the range you are specifying.

Fire rating: Topical treatment required. Cotton fibre does not pass BS 5852 Crib 5 inherently. A back-coating of flame-retardant chemicals must be applied before use in contract environments. The treatment process can affect the appearance and handle of the pile if not applied correctly, and specialist treatment houses experienced with velvet pile should be used. The Crib 5 certification achieved through topical treatment is subject to degradation through repeated cleaning. See our complete guide to Crib 5 for detail on inherent versus topical certification. For the risk of dye colour change after FR treatment, particularly on cotton with reactive dyes, see our dye types and FR treatment guide.

Cleaning code: S or WS depending on the specific range. Confirm the cleaning code on the fabric data sheet before specifying. Cotton velvet treated with a back-coating for Crib 5 may require solvent-only cleaning to avoid degrading the treatment.

Light fastness: Grade 4 to 5 typically with standard reactive dyes. Broadly comparable to mohair at equivalent price points. Cotton velvet takes dye well and can achieve good colour depth.

Pile appearance: Matte to semi-matte. Cotton pile lacks the lustre of mohair and does not produce the same directional sheen. The aesthetic is warmer and less formal than mohair, which suits some residential briefs.

Suitable applications: Domestic upholstery, cushions, curtains, and headboards. Suitable for general domestic and light contract use when correctly specified and treated. Not the first choice for heavy contract environments where the additional cost and complexity of topical treatment, re-treatment requirements, and lower Martindale thresholds make mohair velvet a more defensible specification.

Not recommended for: Heavy contract use without FR treatment and independent testing. High-humidity environments. Applications where the FR certification must survive repeated cleaning without re-treatment.

Cost position: Mid-range. Cotton velvet is typically less expensive than mohair at equivalent pile weights but requires the additional cost of FR treatment for contract use, which narrows the price difference in contract projects.

Silk Velvet

Fibre origin: Cocoon of the silkworm Bombyx mori. Silk is a continuous filament natural protein fibre of exceptional fineness and lustre.

Martindale rub count: Below 15,000 in most cases. Natural silk is the weakest of the natural-fibre velvets in abrasion terms. The fineness of the filament that produces silk’s extraordinary lustre is also the source of its vulnerability to mechanical wear. Silk velvet is decorative fabric, not upholstery fabric in the contract sense of the word.

Fire rating: Topical treatment is possible for domestic standards but silk velvet cannot reliably achieve a full Crib 5 pass for contract use. The coating process can damage the silk pile irreversibly. Silk velvet should not be specified for contract environments requiring BS 5852 Crib 5 certification unless the specific range has been independently tested and certified.

Cleaning code: S. Dry-clean only. Silk is highly water-sensitive. Water will cause permanent watermarking and potentially alter the pile structure.

Light fastness: Grade 2 to 4 typically. Silk is the most photosensitive of the natural upholstery fibres. The dyes used on silk are chemically susceptible to UV degradation. Silk velvet should not be used in rooms with significant natural light exposure and should not be used on curtains where direct sunlight will fall on the fabric face. See our light fastness guide for full context.

Pile appearance: The most lustrous of all velvet pile types. Silk produces an extraordinary depth of sheen that no other fibre can replicate. The visual effect is incomparable when correctly lit in a low-light residential interior.

Suitable applications: Decorative cushions, occasional chairs in low-use residential rooms, curtains in low-light environments, bed throws. Silk velvet is the choice where aesthetic impact is the sole requirement and durability, fire rating, and light fastness are secondary.

Not recommended for: Any contract application. South-facing rooms. Any room with significant footfall or regular seating use. Headboards where regular contact with hair products will degrade the pile.

Cost position: High to very high. Silk is the most expensive natural fibre and the pile density required for velvet construction multiplies the material cost significantly. Quality varies considerably between suppliers.

Linen Velvet

Fibre origin: Flax plant. Linen is a bast fibre extracted from the stalk of the flax plant. It is a strong, textural natural cellulose fibre with a characteristic irregularity of surface.

Martindale rub count: 15,000 to 25,000 typically for linen velvet, though construction varies. Kothea’s Linen Velvet achieves 20,000 Martindale rubs with a SI 1324 cigarette test pass. Linen velvet occupies the domestic to light contract range.

Fire rating: Not inherently Crib 5. Linen is a natural fibre with moderate fire resistance but does not pass BS 5852 Crib 5 without treatment or interliner. For contract use, FR treatment or a Schedule 3 interliner is required. Fabrics containing at least 75% natural fibres by weight may use a Schedule 3 interliner as an alternative to chemical treatment for some standards. Confirm the specific requirement with the relevant authority for the project environment.

Cleaning code: S or WS. Confirm on the data sheet. Linen is water-sensitive in pile form and wet cleaning can cause shrinkage and pile distortion.

Light fastness: Grade 4 to 5 with standard reactive dyes. Comparable to cotton velvet.

Pile appearance: Matte. Linen velvet has a distinctly textural, natural surface character very different from the smooth reflective pile of mohair or silk. The pile is less uniform than mohair or cotton and the fibre’s natural irregularity is visible in the surface of the cloth. This quality is valued in certain residential briefs where a craft or natural aesthetic is sought.

Suitable applications: Domestic upholstery, curtains, cushions, decorative headboards. A strong choice for residential briefs requiring a natural, relaxed aesthetic with moderate durability.

Not recommended for: Heavy contract use. High-humidity environments. Applications where uniformity of pile surface is required.

Cost position: Mid-range. Linen velvet is typically comparable in price to cotton velvet at equivalent construction weights.

Cashmere and Cashmere-Silk Velvet

Fibre origin: Undercoat of the Himalayan Cashmere goat. Cashmere is one of the finest natural fibres available, characterised by exceptional softness and warmth retention.

Martindale rub count: Low. Cashmere fibre is too fine and too short-staple to produce velvet with meaningful abrasion resistance for upholstery use. Cashmere velvet, and cashmere-silk velvet blends, are decorative fabrics. Kothea’s Cashmere Silk Velvet is specified for curtains only.

Fire rating: Topical treatment is technically possible but the handle and appearance of cashmere velvet are typically altered by the coating process. Cashmere velvet cannot be reliably specified for contract upholstery environments requiring Crib 5 certification.

Cleaning code: S. Dry-clean only.

Light fastness: Moderate. Cashmere is a protein fibre and susceptible to UV degradation. Not recommended for high-light environments.

Pile appearance: Extraordinarily soft handle with a subtle, fine lustre. The pile texture is unlike any other velvet and is immediately identifiable by touch. Cashmere-silk blends add luminosity to the characteristic cashmere warmth.

Suitable applications: Curtains, decorative cushions, bed throws, accent pieces in low-use residential rooms. Cashmere velvet is the choice where tactile experience is the primary specification criterion.

Not recommended for: Upholstery of any kind in regular use. Contract environments. Any application where durability or fire certification is required.

Cost position: Very high. Cashmere velvet is among the most expensive interior fabrics available.

Synthetic Velvet: Trevira CS and Polyester

Fibre origin: Petrochemical derivatives. Trevira CS is a branded inherently fire-retardant polyester fibre manufactured in Germany. Standard polyester velvet uses conventional polyester yarn.

Martindale rub count: High. Synthetic velvet typically achieves 50,000 to 150,000 Martindale rubs depending on construction. Synthetic fibres are inherently more resistant to mechanical abrasion than natural fibres of equivalent weight.

Fire rating: Trevira CS is inherently flame-retardant. The flame retardancy is a permanent property of the polyester polymer and survives cleaning. Standard polyester velvet requires topical treatment and may or may not achieve a full Crib 5 pass depending on construction. Always confirm the specific test result and certification for any synthetic velvet before specifying for contract use.

Cleaning code: W or WS typically. Synthetic fibres are more tolerant of water-based cleaning than natural fibres. Many synthetic velvets can be spot-cleaned with water-based upholstery cleaners.

Light fastness: Grade 6 to 7 typically. Synthetic fibres are inherently more UV-resistant than natural fibres. Solution-dyed synthetic velvet, where the colour is incorporated into the fibre during extrusion, achieves the highest light fastness ratings available in velvet form.

Pile appearance: Varies considerably by construction. High-quality synthetic velvet can closely approximate the appearance of natural velvet. Lower-quality synthetic velvet has a flatter, more uniform pile with less depth. The distinguishing quality of natural-fibre velvets, particularly mohair, is visible to an experienced eye in showroom conditions.

Suitable applications: Contract upholstery where fire certification and durability are the primary requirements. Healthcare environments. Transport seating. Applications where machine cleanability or high-frequency cleaning is required.

Not recommended for: Ultra-luxury residential briefs where natural fibre handle and appearance are client requirements. Marine environments without confirming IMO compliance separately.

Cost position: Lower to mid-range. Synthetic velvet is less expensive than mohair at equivalent construction weights, though high-specification Trevira CS velvet from major European mills approaches mohair pricing.

Alpaca Velvet

Fibre origin: Fleece of the South American alpaca. Alpaca is a protein fibre closely related to wool, with a finer and softer handle than most sheep’s wool and a moderate natural lustre.

Martindale rub count: 20,000 to 40,000 typically, depending on construction. Alpaca velvet performs similarly to a well-constructed wool velvet. It is suitable for domestic and light contract use but does not approach the rub counts achievable with mohair.

Fire rating: Alpaca is a natural protein fibre and, like wool and mohair, has moderate inherent fire resistance. However, alpaca velvet cannot be assumed to pass BS 5852 Crib 5 inherently without specific independent testing. Do not specify alpaca velvet for contract use on the basis of fibre type alone. Request the test certificate from the supplier.

Cleaning code: S typically. Confirm with the supplier.

Light fastness: Grade 4 to 5 with standard acid dyes. Comparable to mohair.

Pile appearance: Soft and slightly matte with a gentle natural lustre. Less directional sheen than mohair. The pile has a warmth of character distinct from both mohair and cotton.

Suitable applications: Luxury residential upholstery, cushions, and occasional seating. Alpaca velvet is a niche choice for residential briefs where natural fibre and unusual character are valued over contract performance.

Not recommended for: Heavy contract use. Applications where inherent Crib 5 certification is required.

Cost position: High. Alpaca fibre is less widely produced than mohair or cotton and carries a premium.

Specification Summary by Application

For heavy contract upholstery in hotels, restaurants, bars, and hospitality environments, mohair velvet with an independently certified Crib 5 pass achieved without topical treatment, and a rub count of 80,000 or above, is the most reliable natural-fibre specification. Synthetic Trevira CS velvet is the alternative where budget or client preference for machine-cleanable fabric applies.

For residential upholstery in moderate-use rooms, cotton velvet at 25,000 to 40,000 Martindale rubs is a sound mid-range specification. Linen velvet at 20,000 rubs suits briefs requiring a natural textural aesthetic.

For decorative applications, cushions, and occasional chairs in low-use rooms, silk velvet, cashmere velvet, or alpaca velvet are appropriate where budget allows and the client accepts the care requirements.

For south-facing rooms or high-light environments, confirm the specific ISO 105-B02 grade before specifying any velvet. Mohair in dark colourways, synthetic velvet, and solution-dyed fabrics offer the most reliable light fastness performance.

Frequently Asked Questions

What is the most durable velvet for contract upholstery?

Mohair velvet is the most durable natural-fibre velvet for contract upholstery, achieving Martindale rub counts of 80,000 to 100,000 depending on construction. It also carries an inherent BS 5852 Crib 5 fire rating without topical treatment, making it the only natural-fibre velvet that meets both the durability and fire certification requirements of most UK contract environments without additional cost or treatment. High-specification synthetic velvet using Trevira CS fibre can achieve comparable or higher rub counts and also carries inherent fire resistance, at a lower cost but with a different aesthetic.

What is the difference between mohair velvet and cotton velvet?

Mohair velvet is made from the hair of the Angora goat and achieves Martindale rub counts of 80,000 to 100,000 with an inherent Crib 5 fire rating. Cotton velvet is made from cotton fibre and typically achieves 20,000 to 60,000 Martindale rubs depending on construction, with no inherent Crib 5 rating. Cotton velvet requires topical FR treatment for contract use. Mohair velvet has a characteristic directional sheen and depth of colour that cotton velvet does not replicate. Cotton velvet is less expensive but requires additional investment in fire treatment for contract projects, narrowing the price advantage in practice.

Can silk velvet be used for upholstery?

Silk velvet is not suitable for upholstery in regular use. It typically achieves fewer than 15,000 Martindale rubs, which places it in the decorative category unsuitable for seating. Silk is also highly photosensitive, with a light fastness grade of 2 to 4, meaning it will fade in rooms with natural light exposure. Silk velvet cannot reliably achieve a BS 5852 Crib 5 certification for contract use. It is appropriate for decorative cushions, curtains in low-light environments, and occasional chairs in rooms with very limited use.

Does mohair velvet have an inherent Crib 5 fire rating?

Mohair fibre has natural flame-resistant properties and a correctly woven mohair velvet can achieve a BS 5852 Crib 5 pass without topical chemical treatment, depending on construction and backing. This is not guaranteed for all mohair velvets by fibre type alone and must be confirmed by an independent test certificate for the specific range. Kothea’s active mohair velvet ranges carry independently certified Crib 5 passes without topical treatment. Where this is confirmed, the certification does not depend on chemical coatings, is unaffected by cleaning, and does not alter the handle or appearance of the fabric. This distinguishes correctly certified mohair velvet from cotton, linen, and silk velvets, all of which require topical treatment to achieve Crib 5. Always request the independent test certificate from the supplier before specifying for contract use.

What velvet is best for south-facing rooms?

For south-facing rooms, specify velvet with an ISO 105-B02 light fastness grade of at least 6. Mohair velvet in dark colourways achieves grade 5 to 6. Synthetic velvet and solution-dyed fabrics typically achieve grade 6 to 7. Silk velvet and cashmere velvet should not be specified for south-facing rooms. Cotton and linen velvet achieve grade 4 to 5, which is borderline for sustained south-facing exposure. Always confirm the specific grade with the supplier for the colourway being ordered, as light fastness varies between colourways within the same range.

What is the difference between cut pile velvet and uncut pile velvet?

In cut pile velvet the pile loops are cut during production, producing upstanding individual fibres that create the characteristic dense, soft surface. In uncut pile or loop pile velvet the loops remain intact, producing a harder, more textural surface. Most upholstery velvet is cut pile. Some decorative velvets combine cut and uncut areas to create pattern, known as ciselé or voided velvet. For upholstery specification, cut pile velvet is the standard choice. Uncut or loop pile velvet may be specified where a more durable surface texture is required as the intact loops resist abrasion more effectively than cut pile.

How do I clean velvet upholstery without damaging the pile?

The cleaning method depends on the cleaning code assigned to the specific fabric. Most velvet upholstery is coded S, meaning solvent-based dry-cleaning agents only. Water applied to an S-coded velvet can cause watermarks and permanent pile distortion. Always work in the direction of the pile when applying any cleaning agent or brushing. For minor fresh stains on mohair velvet, a barely dampened lint-free cloth worked in the direction of the pile is acceptable as a first response. Serious staining should always be referred to a specialist dry cleaner experienced with velvet upholstery.

Is linen velvet suitable for contract upholstery?

Linen velvet is suitable for light contract use, subject to FR treatment and confirmation of the Martindale rub count for the specific range. A well-constructed linen velvet at 20,000 Martindale rubs meets the minimum threshold for general contract use. However, linen velvet does not pass BS 5852 Crib 5 inherently and requires topical treatment or an appropriate interliner for contract environments. For heavy contract use requiring 40,000 rubs or above and full Crib 5 certification, mohair velvet or synthetic velvet are more appropriate specifications.

For the tactile properties of each velvet type and how hand differs between fibres, see our fabric hand and tactile properties guide.

For velvet specification in hotel and hospitality projects, see our hotel fabric specification guide. For velvet on walls and headboards, see our wall panels and headboards guide.

Kothea offers mohair velvet, linen velvet, and cashmere silk velvet from its active range. To For when velvet is the wrong choice for a project, see our when not to use velvet guide. For pilling resistance by velvet type, see our pilling resistance guide. For mohair thermal properties in hospitality, see our mohair thermal properties guide.

For full specification data including Martindale rub counts, fire ratings, and light fastness grades by range, see the mohair velvet upholstery page and the silks page.

For guidance on using velvet as an acoustic treatment in home studios and music rooms, see our fabric for home studio acoustics guide.

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5 April 20266 April 2026

Light Fastness and the Blue Wool Scale: Fabric Specification Guide

Light Fastness and the Blue Wool Scale: A Complete Guide for Interior Designers and Specifiers

Light fastness is a fabric’s resistance to fading when exposed to light. For interior designers, it is one of the most practically consequential specifications you will make. A fabric that fades within two years in a south-facing room represents a specification failure regardless of how well it performs on every other measure. This guide explains how light fastness is tested, what the Blue Wool Scale grades mean, which grades to specify for different applications, and how light fastness interacts with fibre type, dye method, and room orientation.

This is the third in a series of technical specification guides from Kothea. The first covers the Martindale rub test and the second covers BS 5852 Crib 5 fire certification.
For why velvet in pale colourways in south-facing rooms is a specific light fastness risk, see our when not to use velvet guide. For colour naming, systems, and metamerism, see our colour naming and specification guide. For the companion test covering dye transfer and crocking, see our colour fastness and crocking guide.

What Light Fastness Means

Light fastness measures how much a fabric’s colour changes when exposed to light. It is not the same as colour fastness generally, which covers a broader range of stressors including washing, rubbing, and perspiration. Light fastness specifically measures the effect of ultraviolet and visible light on the dye or pigment within a fabric.

Fading occurs when light energy breaks down the chemical bonds in a dye molecule, altering its ability to absorb and reflect specific wavelengths of light. The result is a shift in the perceived colour of the fabric, which may manifest as bleaching, yellowing, or a change in hue depending on the dye type and fibre.

The speed and extent of fading depends on the fibre type, the class of dye used, the dyeing method, the intensity and spectrum of light the fabric is exposed to, and the presence of UV filtering in the glazing of the windows in the room.

Light fastness should not be confused with shade change in velvet, which is the apparent change in colour caused by pile being pushed in different directions through use. Shade change is a mechanical phenomenon and is not related to dye degradation or light exposure.

How the Test Works

The standard test for light fastness in the United Kingdom and Europe is ISO 105-B02: Colour Fastness to Artificial Light: Xenon Arc Fading Lamp Test. The fabric specimen is placed in a controlled chamber and exposed to a xenon arc lamp, which produces a spectrum of light representative of natural daylight at the D65 standard illuminant. This simulates the conditions of a south-facing interior window.

The specimen is assessed at intervals by comparing the degree of colour change against a set of eight reference fabrics known as blue wool references, numbered 1 to 8. These references are produced and calibrated by specialist manufacturers such as James Heal, who supply accredited test houses worldwide. Each blue wool reference is dyed with a different dye to produce a known and calibrated resistance to fading. Blue wool 1 is the most fugitive and blue wool 8 is the most resistant. Each successive reference is approximately twice as resistant to fading as the previous one, giving the scale a geometric rather than linear progression. The difference between grade 5 and grade 6 represents twice the resistance of grade 4 to grade 5, not an equal step.

The result awarded to the fabric is the number of the blue wool reference that most closely matches the degree of fading shown by the test specimen. A fabric rated at grade 5 has faded to a degree equivalent to blue wool reference 5 under the same exposure conditions.

The Blue Wool Scale: What Each Grade Means

Grade 1 indicates very poor light fastness. The fabric will fade rapidly under even moderate light exposure. No upholstery or curtain fabric should be specified at this grade.

Grade 2 indicates poor light fastness. Significant fading is expected within a short period. Not suitable for any interior application where appearance durability matters.

Grade 3 indicates moderate light fastness. Acceptable only for very low-light environments with no direct sunlight exposure. Not recommended for curtains or upholstery in standard residential or contract use.

Grade 4 indicates good light fastness and is the recognised minimum for interior furnishing fabrics. Suitable for residential upholstery and curtains in rooms with indirect or limited natural light. Not recommended for south-facing rooms with large glazed areas or for high-light contract environments.

Grade 5 indicates very good light fastness and is the recommended minimum for most residential upholstery and curtain specifications. Suitable for rooms with moderate natural light including east and west-facing rooms.

Grade 6 indicates excellent light fastness and is recommended for south-facing rooms, high-light residential environments, and standard contract interiors including hotels and restaurants.

Grade 7 indicates very high light fastness. Recommended for environments with prolonged or intense light exposure including glazed atriums, conservatories, and south-facing hospitality spaces.

Grade 8 indicates the maximum achievable light fastness and is reserved for the most demanding light environments including marine, semi-outdoor, and direct sunlight applications.

Specification Thresholds by Application

For residential upholstery in rooms with limited or indirect natural light, grade 4 is the minimum acceptable threshold. For residential upholstery in rooms with moderate natural light, specify grade 5 or above. For south-facing rooms or rooms with large glazed areas, specify grade 6 or above. For contract upholstery in hotels, restaurants, and offices with standard glazing, specify grade 5 as a minimum with grade 6 preferred. For glazed atriums, hotel lobbies with skylights, or any environment with prolonged daylight exposure, specify grade 6 to 7.

For curtains, the same grading applies but the exposure is usually more direct and more sustained than for upholstery. A curtain fabric in a south-facing room should be specified at grade 6 or above regardless of whether the curtains are habitually closed or drawn.

For marine, yacht, or semi-outdoor applications, grade 7 to 8 is the appropriate range and specialist outdoor-rated fabrics should be specified rather than standard interior upholstery fabric.

The Effect of Room Orientation

Room orientation is one of the most underspecified variables in fabric selection. A north-facing room in the UK receives no direct sunlight at any time of year, and a grade 4 or 5 fabric is typically adequate. An east-facing room receives direct morning sun for a limited period. A west-facing room receives afternoon sun, which can be intense in summer. A south-facing room receives direct sunlight throughout the day from spring through autumn, with peak UV intensity between midday and 3pm.

The difference in light exposure between a north-facing and south-facing room in London over a twelve-month period is very significant. A grade 4 fabric that performs adequately in a north-facing study may show visible fading within eighteen months in a south-facing drawing room.

Always ask the client which direction the principal windows face and factor that into the light fastness requirement before specifying.

Fibre Type and Dye Method

Not all fibres accept dyes equally, and not all dyes are equally resistant to light degradation. The light fastness of a fabric is a product of both.

Silk is the most photosensitive natural fibre. Silk dyes are chemically susceptible to UV degradation, and silk fabrics typically achieve lower light fastness ratings than wool, cotton, or linen. Silk and silk velvet should be specified with caution in high-light environments, and the client should be advised of this limitation explicitly before specification is finalised.

Wool and mohair accept reactive and acid dyes that can achieve good light fastness ratings when correctly selected. Well-dyed wool upholstery fabrics typically achieve grade 5 to 6. Mohair, being a wool-derived fibre, has similar dye chemistry. Kothea’s Mohair Velvet Seven is tested independently to ISO 105-B02 and achieves grade 4 to 5 for light colourways and grade 5 to 6 for dark colourways. Darker colourways generally achieve higher light fastness grades because a greater proportion of colour loss is required before a visual change becomes perceptible.

Cotton and linen typically achieve moderate light fastness with standard reactive dyes. Pre-washed and solution-dyed cotton and linen can achieve higher grades depending on the dyestuff selection.

Polyester is inherently more resistant to UV degradation than natural fibres and typically achieves grades 6 to 7. Solution-dyed polyester, where colour is introduced into the fibre during extrusion rather than applied to the surface after weaving, achieves the highest light fastness ratings of any standard interior fabric and is appropriate for the most demanding high-light or semi-outdoor applications.

PVC and PU faux leathers are treated with UV-stabilising additives during manufacture and typically achieve high light fastness ratings. However, UV degradation of the substrate itself can cause surface cracking and loss of surface texture independent of colour change, which is a separate consideration for high-light environments.

What Light Fastness Does Not Measure

The ISO 105-B02 test measures colour change under controlled artificial light. It does not measure the effect of UV-filtering glass, which can significantly reduce UV exposure in modern double or triple-glazed windows. It does not measure the effect of cleaning on dye stability, which is covered by separate fastness tests. It does not predict how a specific fabric will behave in a specific room, because actual exposure varies by latitude, season, window orientation, glazing specification, and curtain or blind usage.

Low-e glazing and UV-blocking film can substantially reduce the UV component of light entering a room, extending the effective service life of a fabric beyond what the grade alone would suggest. If a client is refurbishing a property with high-specification glazing, this should be factored into the specification conversation.

Light Fastness and Crocking

Light fastness should not be confused with crocking, which is the transfer of dye from a fabric surface to another material through rubbing or friction. Crocking is measured by a separate test and graded on a different scale of 1 to 5. A fabric with good light fastness may still crock, particularly when wet.

For dark-coloured velvets in upholstery applications, crocking is a relevant concern particularly where light-coloured clothing is likely. Always check the crocking rating as well as the light fastness grade when specifying dark velvets for seating.

Kothea and Light Fastness

Mohair Velvet Seven from Kothea is tested independently to ISO 105-B02 and achieves grade 4 to 5 for light colourways and grade 5 to 6 for dark colourways, making it appropriate for moderate to high-light residential environments and standard contract interiors with adequate glazing.

For high-light environments, colourway selection is material. A dark colourway at grade 5 to 6 will outperform a pale colourway at grade 4 to 5 in a south-facing room. If the client’s brief requires a pale colourway in a south-facing room, this should be discussed explicitly and the light fastness limitation acknowledged before specification is finalised.

For full specification data on light fastness across the Kothea range, see the mohair velvet upholstery page or contact Kothea directly.

How to Specify Light Fastness

Ask the supplier for the ISO 105-B02 grade and confirm whether the test was carried out by an independent third party laboratory or self-declared by the supplier. Self-declared ratings without an independent test certificate should not be relied upon for contract projects.

State the required minimum grade in your specification as a labelled field. For example: Light fastness minimum grade 5 to ISO 105-B02. This makes the requirement explicit and verifiable.

Where the project involves south-facing rooms, large glazed areas, or a light-sensitive colourway, note this in your specification and confirm with the supplier that the grade applies to the specific colourway being ordered. Light fastness can vary between colourways within the same range, particularly between light and dark shades.

Frequently Asked Questions

What light fastness grade do I need for a south-facing room?

For a south-facing room in the UK, specify a minimum of grade 6 to ISO 105-B02 for both upholstery and curtain fabrics. South-facing rooms receive direct sunlight throughout the day from spring through autumn, which represents the most demanding light exposure condition in standard residential interiors. Grade 4, the minimum for interior furnishing fabrics generally, is insufficient for sustained south-facing exposure and will show visible fading within one to two years in most cases. If the glazing incorporates UV-blocking film or low-e coating, this will extend fabric performance, but grade 6 remains the appropriate specification baseline regardless of glazing.

What does a Blue Wool Scale grade of 5 mean for upholstery fabric?

A Blue Wool Scale grade of 5, tested to ISO 105-B02, means the fabric’s colour has faded to a degree equivalent to blue wool reference 5 under controlled xenon arc light exposure. Grade 5 is the recommended minimum for most residential upholstery specifications and is appropriate for rooms with moderate natural light including east and west-facing rooms. It is not recommended for south-facing rooms with large windows, where grade 6 is the appropriate minimum. Each grade on the scale represents approximately twice the light resistance of the grade below it, so the difference between grade 5 and grade 6 is significant rather than marginal.

Does silk fabric fade faster than other upholstery fabrics?

Yes. Silk is the most photosensitive of the natural upholstery fibres and typically achieves lower ISO 105-B02 grades than wool, mohair, cotton, or linen under equivalent conditions. The dyes used on silk are chemically more susceptible to UV degradation. Silk velvet and silk upholstery fabrics should not be specified for rooms receiving significant natural light without an explicit conversation with the client about this limitation. For high-light environments, mohair velvet or solution-dyed synthetic fabrics are more appropriate choices.

What is the light fastness rating of Kothea mohair velvet?

Kothea’s Mohair Velvet Seven is tested independently to ISO 105-B02 and achieves grade 4 to 5 for light colourways and grade 5 to 6 for dark colourways. For south-facing rooms, dark colourways at grade 5 to 6 are the appropriate selection from this range. For rooms with indirect or moderate natural light, light colourways at grade 4 to 5 are suitable. Contact Kothea to confirm the grade applicable to a specific colourway before finalising your specification.

Can UV-blocking glazing improve the effective light fastness performance of a fabric?

Yes. Modern low-e glazing and dedicated UV-blocking film reduce the UV component of light entering a room, which is the primary driver of dye degradation in interior fabrics. A fabric at grade 5 installed behind UV-blocking glazing will typically outlast the same fabric at grade 5 behind standard single glazing by a considerable margin. However, UV-blocking glazing does not eliminate UV exposure entirely, and the ISO 105-B02 grade should still be specified at the appropriate level for the room orientation. Treat the glazing specification as a factor that extends fabric performance, not as a substitute for adequate light fastness in the fabric itself.

What is the difference between light fastness and colour fastness?

Light fastness is a specific type of colour fastness that measures resistance to fading caused by light exposure, tested to ISO 105-B02 and graded on the Blue Wool Scale from 1 to 8. Colour fastness is a broader term covering resistance to colour change or transfer from a range of stressors including washing, rubbing (crocking), perspiration, and dry cleaning, each tested to a separate standard within the ISO 105 series and graded on a scale of 1 to 5. A fabric can have excellent light fastness and poor crocking resistance, or vice versa. For contract upholstery, both light fastness to ISO 105-B02 and crocking resistance should be checked and specified independently.

To request cuttings from the Kothea range, including Mohair Velvet Seven with independent ISO 105-B02 light fastness certification.

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5 April 20266 April 2026

BS 5852 Crib 5: Complete Guide for Upholstery Specification

Brown faux leather chair from April Hamilton

BS 5852 Crib 5: A Complete Guide for Interior Designers and Specifiers

BS 5852 Crib 5 is the fire safety standard required for most contract upholstery in the United Kingdom. If you are specifying fabric for a hotel, restaurant, bar, office, healthcare environment, or any other commercial interior, Crib 5 compliance is the baseline expectation. This guide explains what the standard is, how the test works, the critical difference between inherent and topical certification, and how to specify correctly. For dye types and FR treatment compatibility — which dyes cause fading after treatment — see our dye types and FR treatment guide. For colour fastness and crocking specification, see our colour fastness and crocking guide. For hotel and hospitality projects see our hotel fabric specification guide. For wall panel and headboard applications, a different standard applies: see our guide to fabric for wall panels and headboards.For projects involving yachts or commercial vessels, a separate framework applies: see our guide to IMO marine fire standards for yacht interiors.

What Crib 5 Is

Crib 5 is shorthand for BS 5852 Ignition Source 5. BS 5852, titled Methods of Test for Assessment of the Ignitability of Upholstered Seating, is the British Standard that defines how upholstered furniture materials must behave when exposed to ignition sources of increasing intensity. The standard defines eight ignition source levels. The three that matter most in practice are Source 0 (a smouldering cigarette), Source 1 (a small flame equivalent to a lit match), and Source 5, which is the Crib 5 test.

The name comes from the wooden structure used as the ignition source. A crib is a small lattice of dry timber pieces, stacked five tiers high, weighing approximately 17 grams. The number 5 refers to the number of tiers. The crib is placed on the upholstery assembly and ignited. The test is designed to simulate an ignition event more intense than a match flame, comparable to a burning pile of paper, and is the realistic minimum for contract environments where furniture may be exposed to more severe ignition risks than a smouldering cigarette.

The Three-Stage Test

BS 5852 Crib 5 is not a single test in isolation. To achieve a Crib 5 certification, a fabric must first pass both the cigarette test (Source 0) and the match test (Source 1). Only materials that pass both of these lower-level tests are eligible to proceed to the Crib 5 stage. A material that fails the cigarette or match test cannot be certified to Crib 5 regardless of how it performs under the wooden crib.

For more detail on the cigarette and match stages of BS 5852, see our post on the cigarette and match tests.

In the cigarette test, a smouldering cigarette is placed in the crease between the seat and back of the upholstered test rig. The material must show no ignition and no progressive smouldering.

In the match test, a small burner flame is held against the upholstery for 20 seconds. The material must self-extinguish immediately and show no spread of flame.

In the Crib 5 test, the lit wooden crib is placed on the upholstered assembly. All flaming must cease within 10 minutes. The fire must not spread beyond defined limits or penetrate the filling material. There must be no self-sustaining smouldering after the crib has burned out.

The Composite Nature of the Test

This is the point most frequently misunderstood in specification. BS 5852 does not test the fabric in isolation. It tests the full composite assembly: the fabric cover, the foam or filling, and any interliner, all as they would be used together in the finished piece of furniture.

A fabric that achieves Crib 5 certification in one configuration with a specific foam may not achieve it when applied over a different foam. A certificate from a fabric supplier confirms the fabric was tested in a specific configuration. If the foam or filling used in your project differs from the foam used in the test, the certificate may not be valid for your application.

Always confirm with your fabric supplier the exact configuration under which the Crib 5 test was conducted, including the foam specification, before relying on that certificate for a contract project.

Inherent Versus Topical Certification

The single most important distinction in specifying a Crib 5 fabric is whether the certification is inherent or achieved through topical treatment. The practical consequences are significant.

Inherent Crib 5 means the fire resistance is a property of the fibre itself. The yarn from which the fabric is woven is non-combustible or self-extinguishing by its nature, independent of any chemical application. Mohair velvet is the primary example in the Kothea range. Mohair fibre is inherently resistant to ignition, and a correctly woven mohair velvet carries an inherent Crib 5 pass without any treatment being applied. The certification is permanent, unaffected by cleaning, does not alter the handle or surface appearance of the fabric, and carries no additional cost for FR treatment.

Topical or back-coated treatment is applied to a fabric that is not inherently fire resistant. The fabric passes through a bath of fire-retardant chemicals, which are bonded to the reverse of the fabric through a coating process. The resulting fabric can achieve a Crib 5 pass, but with three important caveats.

First, the BS 5852 standard requires a water-soak test as part of full certification. The fabric is soaked in water to simulate cleaning and then retested. Many fabrics that pass the dry Crib 5 test fail after the water-soak stage. An indicative test without the water-soak is not a complete Crib 5 certificate. Do not rely on an indicative certificate for contract projects without confirming with the client and fire officer that it is acceptable.

Second, the coating process can affect the appearance and handle of certain fabrics. Pile fabrics such as velvets are particularly susceptible. Immersion or back-coating can flatten the pile, stiffen the handle, or leave residue on the face of the fabric. This is one of the reasons mohair velvet with an inherent pass is preferable for contract use over cotton or linen velvet that requires treatment.

Third, a topically treated fabric may need re-treatment if cleaned by a method that degrades the coating. Professional cleaning must use methods compatible with the treatment. Confirm the appropriate cleaning regime with the treatment provider before specifying.

For a detailed guide to the treatment process and the difference between Crib 5 and BS 7176, see our post on FR treatment, BS 7176, and the Crib 5 test.

BS 7176 and Hazard Categories

BS 7176, Specification for Resistance to Ignition of Upholstered Furniture for Non-Domestic Seating, extends the BS 5852 framework by categorising different commercial environments into hazard levels and specifying the appropriate ignition source requirement for each.

Low hazard covers environments such as offices. Medium hazard covers hotels, theatres, and healthcare waiting areas. High and extreme hazard cover environments such as prisons, secure psychiatric units, and offshore installations.

For most hospitality and commercial interiors the relevant category is Medium Hazard, and the standard associated with it is effectively Crib 5. The practical difference between specifying to BS 5852 Crib 5 and specifying to BS 7176 Medium Hazard is that BS 7176 includes the water-soak stage explicitly and requires the certificate to document the specific end-use environment and foam specification. In complex or sensitive projects, specifying BS 7176 Medium Hazard rather than simply Crib 5 gives a more complete and defensible specification. The treatment applied to achieve both is the same.

When Crib 7 Is Required

Crib 7 follows the same principle as Crib 5 but uses a larger wooden crib, seven tiers high, producing a more intense ignition source. It is required in high and extreme hazard environments: primarily prisons, secure psychiatric units, and some offshore or industrial installations. The Regulatory Reform (Fire Safety) Order 2005 assigns responsibility for determining the appropriate hazard category to the responsible person managing the building, not to the designer or fabric supplier. If a project falls into a high hazard category, engage a specialist fire safety consultant before specifying.

Crib 5 fabric, when combined with an appropriate FR foam, can sometimes achieve a Crib 7 pass as a composite. This must be verified by testing and documented with the relevant certificate. Do not assume that a Crib 5 fabric will achieve Crib 7 without independent testing.

For a full explanation of Crib 7 and when it applies, see our post on what is Crib 7.

Curtain Fabrics and the Different Standard

BS 5852 applies to upholstery. Curtain fabrics are governed by a separate standard, BS 5867, which tests vertical hanging fabrics rather than upholstered composites. The two standards are not interchangeable. A curtain fabric certified to BS 5867 is not automatically suitable for upholstery use, and a Crib 5 certified upholstery fabric is not automatically certified for use as a curtain in a contract environment. Always confirm the correct standard for the specific application before specifying.

Kothea Fabrics and Crib 5

Mohair velvet from Kothea carries an inherent BS 5852 Crib 5 pass across all active mohair velvet ranges. The inherent certification means no treatment is required, no additional cost is incurred, the certification survives cleaning, and the handle and surface of the fabric are unaffected. The primary Mohair Velvet range achieves 100,000 Martindale rubs alongside its inherent Crib 5 certification, combining contract-grade durability with the highest fire safety standard for most commercial projects.

Faux Leather 3 from Kothea carries a BS 5852 Crib 5 certification alongside a Martindale rub count in excess of 200,000, making it among the most specification-complete fabrics available for severe contract environments including transport seating, healthcare, and hospitality.

Cotton velvet requires topical treatment to achieve a Crib 5 pass and is not supplied by Kothea with an inherent certification.

How to Specify Correctly

State the standard in full. Ask for BS 5852 Ignition Source 5 (Crib 5), not just Crib 5. The full reference removes ambiguity.

Confirm inherent or topical. Ask the supplier explicitly whether the certification is inherent to the fibre or achieved through topical treatment. If topical, ask whether the full water-soak test was completed and request the certificate confirming it.

Confirm the composite configuration. Ask which foam was used in the test. If your project uses a different foam, the certificate may not cover your specific application.

Use a UKAS-accredited treatment house. If your project requires a fabric to be treated, specify that treatment must be carried out by a UKAS-accredited company. This ensures the process is correctly executed and independently verifiable.

Request the full test certificate. An indicative result is not a certificate. For contract projects, require the independent test certificate before the fabric is upholstered.

Consider BS 7176 for complex environments. For hotel bedrooms, healthcare, or any environment where the hazard category is uncertain, specifying BS 7176 Medium Hazard rather than Crib 5 alone provides a more defensible specification at no additional treatment cost.

Crib 7: The Standard Above Crib 5

Crib 7 is the ignition source immediately above Crib 5 in the BS 5852 series. Where Crib 5 uses a wooden crib of approximately 17 grams with a specific timber species and construction, Crib 7 uses a larger and more severe crib of approximately 126 grams. The test assembly is the same — a seat and back pad covered in the fabric being tested — but the larger ignition source represents a significantly more demanding fire scenario.

Crib 7 is not widely required in mainstream UK contract specification. The environments where it is applicable include some prison and secure accommodation furniture, certain defence and government procurement specifications, and some highly specific public sector contracts where the risk assessment has determined that the standard Crib 5 level of protection is insufficient. It is also referenced in some transport seating specifications, though IMO standards apply in the marine context rather than BS 5852.

For most hotel, restaurant, office, and residential contract interiors, Crib 5 is the correct and sufficient standard. Specifiers who encounter a Crib 7 requirement should confirm with the project’s fire risk assessor whether it is genuinely required for the specific application, as it is a materially more demanding test and limits the fabric options available considerably. Very few standard upholstery fabrics carry a certified Crib 7 pass. Purpose-made fire-retardant fabrics with specialist construction and treatment are typically required.

If your project has a Crib 7 requirement, contact us directly to discuss suitable fabric options for the specific application.

For surface spread of flame requirements for wall and ceiling linings — a separate standard from Crib 5 — see our BS 476 Part 7 guide.

For fabric sustainability certifications including GOTS and Oeko-Tex, see our fabric sustainability certifications guide. For healthcare fire standards including BS 7176, see our healthcare fabric guide.

For how the Building Safety Act 2022 affects fabric fire certification documentation in higher-risk buildings, see our Building Safety Act and fabric specification guide.

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5 April 20267 April 2026

The Martindale Rub Test: Complete Guide for Upholstery Specification

For colour naming, systems, and how to communicate colour precisely across trades, see our colour naming and specification guide.

What the Martindale Test Is

The Martindale test is a standardised method for measuring a fabric’s resistance to abrasion. It simulates the wear a fabric experiences in normal use on upholstered furniture by rubbing a fabric sample against a standard abrasive surface under controlled conditions and counting how many cycles the fabric can withstand before showing visible signs of deterioration.

The result is expressed as a number of rubs or cycles, always reported in multiples of 5,000. The higher the number, the more resistant the fabric is to abrasion, and the more suitable it is for demanding applications.

The test is defined under the international standard BS EN ISO 12947, which has four parts covering the testing apparatus, determination of specimen breakdown, determination of mass loss, and assessment of appearance change. Part 2, the determination of specimen breakdown, is the most commonly cited in fabric specifications.

A Brief History

The test takes its name from J.G. Martindale, who developed the method in 1942 at the Wool Industries Research Association, known as WIRA, for wartime research into gas-protection fabrics. It was not originally designed for upholstery. Its application to furniture and interior textiles came later, as the method proved to be a reliable and repeatable way of measuring abrasion resistance across a wide range of fabric types. It was adopted as a British Standard and subsequently incorporated into the European and international standards framework as BS EN ISO 12947. Today it is used by fabric manufacturers, test houses, and specifiers across the UK, Europe, and internationally as the benchmark for upholstery durability.

How the Test Works

A circular sample of the fabric under test, 140mm in diameter, is mounted face-down in a specimen holder on the lower plate of the Martindale machine. A foam backing is placed behind the sample to simulate the padding of upholstered furniture. A smaller disc of worsted wool fabric, 38mm in diameter, is mounted on the upper plate as the abradant. Under some test configurations wire mesh is used as the abradant instead of wool.

The machine applies a constant load of 12 kilopascals, equivalent to approximately 120 grams per square centimetre, which simulates the pressure of a seated person. The upper plate then moves against the lower plate in a Lissajous curve, which is a compound figure-of-eight motion that ensures the abrasion is applied in multiple directions rather than a single line. This multidirectional motion is what distinguishes the Martindale method from the Wyzenbeek method, which applies abrasion in a straight back-and-forth line.

The test pauses every 5,000 cycles and the sample is inspected under a standardised light source. The inspector looks for two complete yarn breaks or a noticeable change in the appearance of the fabric surface, such as pilling, flattening, or loss of pile. When either of these conditions is met, the test ends and the cycle count at that point is the fabric’s Martindale rub count.

Because the test pauses at 5,000-cycle intervals, the result is always a multiple of 5,000. A fabric described as achieving 25,000 rubs reached that interval and passed; it was not tested through the full 30,000 interval. Multiple samples from different areas of the same fabric are tested simultaneously to account for variation within the material. The abradant is replaced after every 50,000 cycles to prevent glazing, which would artificially inflate results.

What the Rub Count Means in Practice

The rub count is a guide to the appropriate application of a fabric, not a guarantee of a specific lifespan. The following thresholds represent the standard classifications used in the UK and Europe, with examples from the Kothea range at each level.

Under 10,000 rubs: decorative use only. Fabrics at this level are suitable for cushions, throws, and accent pieces that receive minimal friction. They are not suitable for any application where a person will sit on or lean against the fabric regularly.

10,000 to 15,000 rubs: light domestic use. Suitable for occasional-use furniture in low-traffic rooms, such as a bedroom accent chair that is rarely sat on, or decorative cushion covers on a guest bedroom bed. Often applicable to fabrics with delicate yarns that require dry cleaning. Not recommended for main living room seating.

15,000 to 25,000 rubs: general domestic use. The standard range for everyday household furniture including living room sofas and dining chairs in a single-occupancy or couple household. Kothea’s Relax Linen at over 15,000 rubs and Linen Velvet at 20,000 rubs sit within this band, making them suitable for residential upholstery in schemes where appearance takes priority over heavy-use durability.

25,000 to 40,000 rubs: heavy domestic and light contract use. Suitable for high-use family furniture with children and regular daily use, and for light commercial applications such as a private office or a boutique hotel bedroom that is not turned over multiple times per day. Kothea’s Restful Linen at over 45,000 rubs falls into this band and above, making it suitable for contract bedroom seating and residential upholstery in heavily used rooms.

40,000 rubs and above: contract grade. The standard threshold for commercial upholstery in hotels, restaurants, bars, and offices. Fabric at this level is specified where furniture will receive daily use by multiple different people over an extended period without replacement or reupholstering. Kothea’s Recline Linen achieves 80,000 Martindale rubs. Mohair Velvet achieves 100,000 Martindale rubs. Fine Cotton Velvet achieves 110,000 Martindale rubs. Faux Leather 3 achieves in excess of 200,000 Martindale rubs, placing it among the most abrasion-resistant upholstery fabrics available for contract specification.

A note on diminishing returns. Results above 50,000 rubs have little additional practical impact on longevity for most residential applications. The difference between a fabric at 50,000 and one at 100,000 is not meaningful in a domestic living room. The significance of very high rub counts lies in the most demanding contract environments: transport seating, healthcare waiting rooms, casino public areas, and anywhere furniture is in continuous use around the clock.

What the Martindale Test Does Not Measure

The rub count is one indicator of fabric performance, not a complete picture of durability. Specifiers should be aware of the following limitations.

UV light resistance and fading. The Martindale test is conducted in a controlled environment with no light exposure. A fabric that achieves 100,000 rubs may fade significantly in a south-facing room within a year. Light fastness is a separate property tested against the Blue Wool Scale under a different standard entirely.

Pilling. Pilling is the formation of small fibre balls on the surface of a fabric through repeated rubbing. It is a normal characteristic of many natural and blended fibres and is not the same as abrasion failure. A fabric can pill at relatively low rub counts without the yarns breaking. Pilling resistance is assessed separately and is particularly relevant when specifying wool and mohair fabrics.

Staining and liquid resistance. The test is conducted dry. It gives no information about how a fabric will respond to spillage, moisture, or cleaning agents. A high rub count does not indicate stain resistance.

Pet damage. Cat and dog claws create a tearing and snagging force that is entirely different from the flat circular abrasion of the Martindale machine. No rub count, however high, predicts resistance to animal claws.

Seam slippage and tensile strength. The abrasion test is conducted on a flat sample away from seams. A fabric that performs well in abrasion may have poor seam strength when cut, sewn, and stretched over a frame. Tensile strength is a separate test.

Chemical degradation. Cleaning agents, solvent-based spot removers, and harsh detergents can degrade fabric fibres and surface finishes in ways the Martindale test does not simulate. Always confirm the appropriate cleaning code for a fabric before specifying it in an environment where soiling and cleaning will be frequent.

Furniture construction and padding. The rub count assumes the fabric is correctly upholstered over adequate padding. Fabric specified at 40,000 rubs applied over a poorly padded frame with sharp edges will fail prematurely because the real stress concentrates at contact points the laboratory test does not replicate.

Martindale and Wyzenbeek: the Key Difference

Designers working on international projects, particularly those involving US clients or global hotel brands, will encounter both the Martindale and Wyzenbeek test standards. The two are frequently confused and occasionally treated as interchangeable. They are not.

The Wyzenbeek test, defined under ASTM D4157, is the standard used in North America. It applies abrasion in a straight back-and-forth motion along the warp and weft of the fabric using cotton duck or wire mesh as the abradant. Each back-and-forth movement is called a double rub. The test ends when two yarn breaks occur or noticeable wear is observed.

The Martindale test applies abrasion in a multidirectional Lissajous figure-of-eight motion. Because it tests multiple directions simultaneously, it subjects the fabric to a more complex pattern of stress than the straight-line Wyzenbeek test.

There is no reliable conversion factor between the two tests. A common industry rule of thumb holds that Martindale results run approximately one third higher than Wyzenbeek results for equivalent fabrics, and that for heavy-duty contract use a specifier might require either 30,000 Wyzenbeek double rubs or 40,000 Martindale cycles as the minimum. This is a directional guide only. A fabric that achieves a given Wyzenbeek score cannot be assumed to achieve any particular Martindale score without being independently tested to both standards. The two tests measure different properties of abrasion resistance and success in one does not infer success in the other.

For a detailed comparison of the two methods, including end-use specification guidance, see our full article: Martindale vs Wyzenbeek: Rub Test by Abrasion Explained.

For projects governed by UK and European standards, always require Martindale figures. For projects governed by US or North American standards, require Wyzenbeek figures. Do not attempt to derive one from the other.

How to Specify Correctly

Match the rub count to the actual use, not the most demanding possible use. Over-specifying abrasion resistance frequently leads to specifying a fabric that is technically correct but aesthetically wrong for the project. A fabric rated at 100,000 rubs is not necessary in a private bedroom and the range of available fabrics at that performance level is narrower than at 25,000 rubs.

Consider the full performance profile. Alongside the Martindale figure, check the cleaning code, light fastness rating, fire rating, and pilling resistance before finalising a specification. Each of these is independent of the rub count.

Confirm the test conditions. Ask the supplier whether the rub count was achieved with or without a backing, which abradant was used, and which part of ISO 12947 was applied. Results tested with a foam backing are not directly comparable to results tested without one. This level of detail is rarely published on a standard product sheet but a serious supplier will have it available.

Require third party test certificates for contract applications. Self-certified figures carry no independent verification. For contract projects where the rub count or other performance claims carry legal or liability implications, require test certificates from an accredited independent laboratory before specifying.

Use the rub count alongside a sample. A sample in the hand tells you things the rub count cannot: handle, drape, pile direction, surface texture, and how the fabric behaves when manipulated. Specify by rub count to confirm technical suitability, then choose by sample.

For the US equivalent abrasion test and how Wyzenbeek double rubs differ from Martindale rubs, see our Wyzenbeek vs Martindale guide.

For pilling resistance — a distinct property from abrasion measured by a separate test — see our pilling resistance guide.

Martindale Rub Counts Across the Kothea Range

Kothea supplies Martindale rub count data for all relevant fabric ranges. The following gives a summary by performance level.

15,000 rubs and above: Relax Linen (100% linen, pre-washed)
20,000 rubs: Linen Velvet (100% linen pile)
45,000 rubs and above: Restful Linen (100% linen, pre-washed)
80,000 rubs: Recline Linen (54% linen 35% cotton 11% polyamide, pre-washed)
100,000 rubs: Mohair Velvet (pile 100% mohair, inherent Crib 5)
110,000 rubs: Fine Cotton Velvet (100% cotton)
In excess of 200,000 rubs: Faux Leather 3 (1% PU 82% PVC 17% polyester, Crib 5)

Wyzenbeek: The US Abrasion Standard

The Wyzenbeek test (ASTM D4157) is the abrasion standard used in the United States. If you are specifying fabric from an American supplier or working on a project with US compliance requirements, you may encounter Wyzenbeek double rub counts rather than Martindale rub counts on data sheets.

Wyzenbeek rubs fabric back and forth in straight lines against a cotton duck canvas abradant — a significantly more abrasive surface than the worsted wool used in Martindale. The result is expressed in double rubs rather than rubs. The two figures are not directly comparable and no reliable conversion factor exists between them. A Wyzenbeek double rub count cannot be used in place of a Martindale rub count on a UK specification.

For UK and European projects, always specify Martindale to ISO 12947. Wyzenbeek results from American suppliers should be noted for reference but should not be presented to building control officers, insurers, or UK contract clients as equivalent to a Martindale certification. The approximate US contract thresholds for Wyzenbeek are: residential 9,000 to 15,000 double rubs; light commercial 15,000; heavy commercial 30,000 to 50,000; severe commercial 100,000.

For a full comparison of the two test methods, see our Wyzenbeek vs Martindale guide.

For guidance on when to specify contract-grade performance for residential projects, see our contract fabric for residential projects guide.

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