BS5867 part 2 type B is a contract standard for fire retardancy for CURTAINS.

As an interior designer you do *NOT* need to understand the details of the test nor the performance criteria that needs to be achieved.

However interior designers are responsible for the project/installation and because this is a serious are concerning fire risk you DO NEED to:
- Be certain what standard is required for your project/installation;
- Know that you are specifying fabric that meets the appropriate standard; and
- Prove that the fabric you have installed is up to the job.

So here is what you need to do to achieve that, essentially what you need to do to do your job and to ensure you have covered the bases of your responsibility.

1. Determine the fire retardancy standards that need to be adhered to. This may involve contacting the local fire officer. Determine what documentation you need to provide them.

2. Liaise with your fabric supplier to determine if the fabric either:

- inherently meets the standards; or

- requires treatment.

3. On purchasing the fabric, specify the treatment required. You would say to the fabric company “Treat the fabric to the contract curtain standard BS 5867 part 2 type B, and provide me with documentation showing this has been done”.

4. What you have done now is to specify what standard of treatment has to be undertaken. By doing that there is no guarantee that the fabric will pass the appropriate test even though it has been treated to a standard where is should pass the test. Normally you will receive a document saying that the fabric has been treated to the standard. THIS DOES NOT MEAN IT HAS PASSED THE STANDARD. You need to determine if you want your specific batch of fabric to be specifically tested (after treatment). For larger projects this will almost certainly be prudent to undertake. You will need to purchase additional fabric prior to treatment and engage the services of a fabric testing factory (not treatment factory). At the end of that process you will receive documentation stating that the fabric meets the required standard.

Here is related information on fire retardacy for contract upholstery (Crib 5, BS7176 BS5852) and durability of fabric for  contract and domestic upholstery. More…

The following test details are not normally required to be known by the designer:

Test method

A sample of the fabric, vertically held, is exposed to a small flame.

For type B (Hotels, etc) the ease of ignition is observed. It is also noted if the flame reaches one any edge of the specimen and/or if any burning pieces of fabric fall down.

For type C (NHS) the fabric is further analysed to see what happens once the flame stops but when the fabric still may be glowing.

NB: The fabric is tested before and after laundering
type B (12 wash cycles at 40°c)
type C (50 wash cycles at 40°c)

Test Performance Criteria

Type B Performance Criteria: The edges must remain completely intact and no burning debris should fall.

Share & Enjoy!

I will return later in another post to KOTHEA’s quite remarkable sales figures for the financial year just finished. Most surprising, especially considering we are in the midst of a recession. We had our best ever year and by quite a large margin.

We expect some coverage of the new collections in World of Interiors and Elle decoration but, again, more on that at another time.

Where can you see our collections? Well, we are as elusive as ever but we are starting to digitize some images to our flickr feed (click the images on the right or here). The flickr update is ongoing, there is information on flickr now but some of the images are not final and some images do not have full associated descriptions / product details but we are woking on that this week. Our usual clients will receive the new collections in due course starting in late summer; if you need them more urgently for pressing projects of course we will be happy to oblige. Please get in contact in the usual way.

Not all are in production yet but most sampling is available now.

As a very broad summary we have:

1. New colours of several existing ranges including faux leather;

2. More velvets including patterned and crush;

3. Striped, double width linens;

4. Upholstery weight linen; and

5. A few more interesting one-off designs in limited colourways like the one heading up this blog post.

Share, Accredit & Enjoy!

Curtain Fabric - Sheer

Curtain fabric from KOTHEA provides the most beautiful and opulent textures and colours combined with technical characteristic making the fabric directly suitable for curtains because of its light fastness or suitable when interlined. KOTHEA never compromise on elegance in design throughout their extensive range of collections that encompass many silks and sheers and other beautifully coloured fabrics. Much more information can be found about our products and company elsewhere here in The Fabric Blog.

Try searching for particular technical characteristics like ‘light fastness’ or ‘ the specific type of product like ‘silk’ or ‘curtain fabric’ or ‘double width sheers’.

Alternatively ask a question by commenting on this page and it will be answered.

Curtain Material - Sheer

Curtain material from KOTHEA provides the most beautiful and opulent textures and colours combined with technical characteristic making the material directly suitable for curtains because of its light fastness or suitable when interlined. KOTHEA never compromise on elegance in design throughout their extensive range of collections that encompass many silks and sheers and other beautifully coloured material. Much more information can be found about our products and company elsewhere here in The Fabric Blog.

Try searching for particular technical characteristics like ‘light fastness’ or ‘ the specific type of product like ‘silk’ or ‘curtain fabric’ or ‘double width sheers’.

Alternatively ask a question by commenting on this page and it will be answered.

KOTHEA Release New Fabric For Interiors

LONDON, England. 03-AUGUST-2009 11.30 AM: KOTHEA today announced it has expanded its extensive curtain fabric collection by the addition of KOOMEGA DUPION. KOOMEGA DUPION is a highly unusual contract fabric – on the face of it a superb silk for contract curtain usage with washability and both daylight colour fastness and UV resistance. Yet these are not characteristics not usually associated with silk. 28 colours make it a steadfast choice with more than enough colour options for every scheme. The beautiful fabric looks the part of the finest silk, yet it is a silk alternative, attractively priced for high volume contracts and desirable for domestic usages where silk is required in high-light conditions.

KOOMEGADUPION

Reference: 20-001-452

Colour Shown: Pink

Other colourways: 28

Width: 158cm

Repeat: none

Composition: 100% Polyester

Martindale: na

Primary Usage: Curtains, contract & domestic.

Type of fabric: Silk alternative

About KOTHEA.

KOTHEA are a top-market fabric house based in London serving customers throughout all of Europe and The Middle East. Founded in 1999 they have since continued to develop and sell an extensive range of timeless fabrics to the top architects, interior- and yacht-designers for projects ranging from mega-yachts to boutique hotels and from luxury spas to penthouses.

KOTHEA operate on a trade-only basis and their fabrics are available to the public through interior designers and specialist interior design shops such as Gotham, Interiors Bis and Fiona Campbell. KOTHEA also supply beautiful hand-woven linen fabrics and finished goods – throws and table linen.

KOTHEA’s trade customers would perceive their signature fabrics to include several ranges of velvet including the exclusive ‘cashmere silk velvet’, silks, linens, double-width sheers, faux leather and interesting weaves for upholstery often with high Martindale ‘rub tests’ making them highly suited to both contract and residential projects.

Founder and Executive Director, Lisa Parsons started KOTHEA more than 10 years ago after 11 highly successful years with Nobilis Fontan in Chelsea and Donghia in Chelsea Harbour. She says, “At KOTHEA we like to think we bring something a little different to the market. Our difference will be reflected in our customers’ eyes by unusual fabrics that complement our core fabric ranges; all augmented by our excellent levels of customers service, market knowledge and attention to detail.”

# # #

The Martindale rub test (covered extensively, elsewhere on this site) is an abrasion test. Essentially is mimics sofas being sat on a lot.

Any fabric can be put through the test procedure.

Sheer fabrics are used for curtains and blinds.

So the answer is “No”. Only because sheer fabrics are not used on sofas.

For sheer fabrics or for contract curtains then the most important test is for flame retardancy/flammability.

LONDON, England. 06-JULY-2009 11.30 AM: KOTHEA today announced it has expanded its extensive upholstery fabric collection by the addition of KOCAFELATTE. KOCAFELATTE is a somewhat quirky and hard wearing fabric with an unusual, fine patterned design. It is a striking fabric with a high Martindale result, achieved whilst maintaining the highest levels of exclusive design. It is well suited for a range of uses but targeted towards upholstery and cushions in either domestic or contract installations.

KOCAFELATTE Reference: 02-002-415 Colour Shown: Champagne Other colourways: 3 Width: 135cm Repeat: V9 – H9cm Composition: 100% Viscose Martindale: 40,000 ‘rubs’ Primary Usage: General upholstery or window treatments, contract & domestic. Type of fabric: Textured Weave

About KOTHEA.

KOTHEA are a top-market fabric house based in London serving customers throughout all of Europe and The Middle East. Founded in 1999 they have since continued to develop and sell an extensive range of timeless fabrics to the top architects, interior- and yacht-designers for projects ranging from mega-yachts to boutique hotels and from luxury spas to penthouses.

KOTHEA operate on a trade-only basis and their fabrics are available to the public through interior designers and specialist interior design shops such as Gotham, Interiors Bis and Fiona Campbell. KOTHEA also supply beautiful hand-woven linen fabrics and finished goods – throws and table linen.

KOTHEA’s trade customers would perceive their signature fabrics to include several ranges of velvet including the exclusive ‘cashmere silk velvet’, silks, linens, double-width sheers, faux leather and interesting weaves for upholstery often with high Martindale ‘rub tests’ making them highly suited to both contract and residential projects.

Founder and Executive Director, Lisa Parsons started KOTHEA more than 10 years ago after 11 highly successful years with Nobilis Fontan in Chelsea and Donghia in Chelsea Harbour. She says, “At KOTHEA we like to think we bring something a little different to the market. Our difference will be reflected in our customers’ eyes by unusual fabrics that complement our core fabric ranges; all augmented by our excellent levels of customers service, market knowledge and attention to detail.”

# # #

For Further Information

Please visit the company web site at http://www.kothea.com

Trademarks

KOTHEA is a registered trade mark of KOTHEA Limited. Other names may be trademarks of their respective owners.

A material’s degree of resistance to the fading effect of light.

Upholstery
AATCC 16 Option 1 or 3-2003 Grade 4 minimum
at 40 hours

Direct Glue Wallcoverings
AATCC 16 Option 1 or 3-2003 Grade 4 minimum
at 40 hours

Wrapped Panels and Upholstered Walls
AATCC 16 Option 1 or 3-2003 Grade 4 minimum
at 40 hours

Drapery
AATCC 16 Option 1 or 3-2003 Grade 4 minimum
at 60 hours

QuickTime Movies (click link to play)
Colorfastness to light

TEST METHOD
AATCC 16 Option 1 or 3 – 2003*
The AATCC 16 Option 1 and 3 are test methods of the American Association of Textile Chemists and Colorists (AATCC). ACT recognizes both methods where the only difference is the light source being used. In AATCC 16 Option 1 a Carbon-Arc lamp is used as the light source and in AATCC 16 Option 3 a Xenon-Arc lamp is used. Under both methods a strip of fabric (part of which is protected by a special paper card) is placed in a fadometer and exposed to 40 hours of accelerated fading units (AFU). After the exposure the difference in color between the exposed and protected parts of the fabric are compared to the AATCC gray scale and the degree of fading is rated.

Grade 5 = no fading
Grade 4 = slight fading
Grade 1 = high degree of fading

* For complete technical details about AATCC 16 Option 1 or 3 – 2003: http://www.aatcc.org

Source: Association for contract textiles (USA)

Ultra violet light is one of the major contributing factors that cause fading and fabrics to break down.  Here are some simple tips to optimise the life of your curtains:

• Always use good quality lining.

• Consider the compositions of fabrics; some will fade and break down faster than others.

• Sunscreen blinds are recommended

• Always allow space for your curtains / blinds to be pulled back off your windows.

KOTHEA was recently asked if we have wider fabrics available that are suitable for window treatments ie sheers and curtain material.

We have handwoven linens that can be up to 180cm wide in 15 designs and many colours as well as the ability to produce custom colours for specific schemes. (Minimum orders apply of between 5-10m). We also have standard handwoven linen ranges in 150cm widths.

LONDON, England. 04-MAY-2009 11.30 AM: KOTHEA today announced it has expanded its product range by the addition of KOTWIG. KOTWIG has an off-the-wall textured design. It has a high Martindale score which is unusually achieved without incorporating polyester. It is highly suitable for a wide range of uses including heavy upholstery and wall treatments in either domestic or contract installations.

Flickr Image Of KOTWIG

Full information can be found <here>.

KOTWIG

Reference: 14-002-436

Colour Shown: Brown – Light Brown

Other colourways: 20

Width: 145cm

Repeat: None

Composition: 43% Linen, 36% Viscose, 21% Cotton.

Martindale: 40,000 ‘rubs’

Primary Usage: General upholstery or wall treatments, contract & domestic.

Type of fabric: Textured Weave

About KOTHEA.

KOTHEA are a top-market fabric house based in London serving customers throughout all of Europe and The Middle East. Founded in 1999 they have since continued to develop and sell an extensive range of timeless fabrics to the top architects, interior- and yacht-designers for projects ranging from mega-yachts to boutique hotels and from luxury spas to penthouses.

KOTHEA operate on a trade-only basis and their fabrics are available to the public through interior designers and specialist interior design shops such as Gotham, Interiors Bis and Fiona Campbell. KOTHEA also supply beautiful hand-woven linen fabrics and finished goods – throws and table linen.

KOTHEA’s trade customers would perceive their signature fabrics to include several ranges of velvet including the exclusive ‘cashmere silk velvet’, silks, linens, double-width sheers, faux leather and interesting weaves for upholstery often with high Martindale ‘rub tests’ making them highly suited to both contract and residential projects.

Founder and Executive Director, Lisa Parsons started KOTHEA more than 10 years ago after 11 highly successful years with Nobilis Fontan in Chelsea and Donghia in Chelsea Harbour. She says, “At KOTHEA we like to think we bring something a little different to the market. Our difference will be reflected in our customers’ eyes by unusual fabrics that complement our core fabric ranges; all augmented by our excellent levels of customers service, market knowledge and attention to detail.”

LONDON, England. 06-APR-2009 11.30 AM: KOTHEA today announced it has expanded its product range by the addition of KOCOSMIC. KOCOSMIC is a little bit quirky; like a faux skin without trying too hard to mimic nature. It has high rubs and is suitable for a wide range of uses including heavy upholstery and wall treatments in either domestic or contract installations.

KOCOSMIC

Reference: 03-004-378
Colour Shown: 3 Silver
Other Colourways: 19
Width: 140cm
Repeat: None
Composition: 100% Cotton base cloth, 95% Vinyl 5%, Polyurethane outer.
Martindale: BS5690 100,000
Primary Usage: Heavy upholstery, wall treatments, contract & domestic.
Type of fabric: Vinyl
Other: Passes BS5852 Schedule 4 Part 1 Cigarette Test, Schedule 5 Part 1 Match Test and Crib 5.

About KOTHEA.

KOTHEA are a top-market fabric house based in London serving customers throughout all of Europe and The Middle East. Founded in 1999 they have since continued to develop and sell an extensive range of timeless fabrics to the top architects, interior- and yacht-designers for projects ranging from mega-yachts to boutique hotels and from luxury spas to penthouses.

KOTHEA operate on a trade-only basis and their fabrics are available to the public through interior designers and specialist interior design shops such as Gotham, Interiors Bis and Fiona Campbell. KOTHEA also supply beautiful hand-woven linen fabrics and finished goods – throws and table linen.

KOTHEA’s trade customers would perceive their signature fabrics to include several ranges of velvet including the exclusive ‘cashmere silk velvet’, silks, linens, double-width sheers, faux leather and interesting weaves for upholstery often with high Martindale ‘rub tests’ making them highly suited to both contract and residential projects.

Founder and Executive Director, Lisa Parsons started KOTHEA more than 10 years ago after 11 highly successful years with Nobilis Fontan in Chelsea and Donghia in Chelsea Harbour. She says, “At KOTHEA we like to think we bring something a little different to the market. Our difference will be reflected in our customers’ eyes by unusual fabrics that complement our core fabric ranges; all augmented by our excellent levels of customers service, market knowledge and attention to detail.”

# # #

For Further Information
Please visit the company web site at http://www.kothea.com

Trademarks
KOTHEA is a registered trade mark of KOTHEA Limited. Other names may be trademarks of their respective owners.

Share & Enjoy

1. Cheaper make up costs as there can be less work involved in using a wider fabric;
2. The ability to improve the overall aesthetic look – as there are fewer seams; and
3. The ability to be railroaded (ie made up with the pattern going the ‘other’ or the ‘wrong’ way. A width of 300cm or thereabouts is often sufficient for many drops (lengths) and this can eliminate the need for any seams.

Some of the best ideas are often the simplest.

1. Domestic

a. Curtains – No treatment is required.
b. Upholstery – The fabric must be treated to reach the match test (BS5852: Part1: 1979: Source 1).
The designer must first check the fabric passes the cigarette test (BS5852: Part1: 1979: Source 0).

Note:
The cigarette test meets the equivalent European standard BS EN 1021-1.
The match test meets the equivalent European standard BS EN 1021-2.
Fabrics containing 75% mixed-natural or natural fibre content do not usually require treating as they normally pass ‘the cigarette test’. You must use a Schedule 3 interliner (fire retardant to CRiB 5) though.

2. Contract

a. Curtains – The fabric must be treated to BS5867: Part 2: Type B.
Some fabrics meet this standard naturally, most do not. Some fabrics cannot be treated for this standard.
b. Upholstery – The fabric must be treated to BS5852: 1990: Source 5 (CRiB 5).
This involves the fabric being back coated and most fabrics can be treated in this way.

Note:
BS7176 covers BS5852: 1990. And BS5852: 1990 covers BS5852: Part 1: 1979 and BS 5852: Part 2: 1982. So the info above in 2b is correct. This treatment meets European standards.

3. Other Uses
Head boards, bed covers, wall coverings, yachting and aviation may have differing requirements.

There is a broad equivalence of British and European standards. However the standards for the USA are different to Europe.

Share & Enjoy

KOTHEA introduces KOCHENCAT, a versatile and extravagant fabric delivering understated excellence for designers in the yacht, spa and boutique hotel markets.

An extensive colour palette covering 27 colours gives colour options for every interior. Gold, lime, charcoal, taupe and ivory complement all discerning schemes and the luxurious feel of a fabric mixed with chenille and cotton delights all the senses.

Combine beauty with practicality and you get KOCHENCAT. This versatile, textured weave is suitable for demanding environments; it has the superb durability demonstrated by high Martindale ‘rub’ characteristics and can be further treated to resist the demands of water and heat – as is always expected in the yacht and hospitality industries. It is equally at home as upholstery, as panelling or as curtain material.

Versatility, beauty, dependability: KOCHENCAT.

Share & Enjoy

Fortunately static is rarely noticed when curtains are hung, this is partly because of the chosen combination of materials and partly also because the weight of the material overcomes the weak power of static electricity. However if you do have this rare problem then you have already invested a lot of time, effort and money into buying curtain material and having them made up and hung. Do you have to start again?

Before answering that dreaded question it is important to understand what causes the problem in the first place. There is little point in re-making the curtains if the same problem is going to happen again.

Static is a natural phenomena. The main way in which static is created is when two materials are rubbed together causing an excess electrical charge on their surfaces. It is not, however, caused by the friction itself and it is not caused because a material is synthetic/man-made.

All materials differ in their propensity to cause static. It takes the properties of TWO materials to cause static; one must be good at giving up ‘electrons’ and the other good at receiving ‘electrons’. The better that each of the materials are at giving/receiving ‘electrons’ then the more static there will be. For any scientists reading, you might remember that this is measured by The Triboelectric Series.

On the Triboelectric Series; hair, wool, glass, nylon and fur are good at giving up electrons. Whereas silk, paper and cotton are at the other end of the scale and are bad at giving up electrons. Conversely; wood, metals, polyester and styrene are bad at attracting electrons whereas at the other end of this side of the scale polyurethane, polyethylene, vinyl/PVC are good at attracting electrons.

Thus a combination of PVC and hair would produce the most static whereas cotton and wood would produce the least. If you think about combing your hair then this should ring true.

Polyester is very similar to gold, platinum, brass, silver, nickel and copper in its static generating properties. Whereas, cotton is one of the lowest materials on the scale.

So the first lesson, bearing in mind the above, is that the choice of materials ie the curtain and the lining are critical. Also any surface that the curtain comes into contact with is important. So the second lesson is to consider the location.

Let’s turn now to how the curtain is made up. An experienced, professional curtain maker should know how to avoid the static problem.

Taking an example of a mixed composition fabric. Let’s say 40% cotton, 40% viscose and 20% polyester. And let’s also say that the material is loosely woven and has movement. Looking at such a fabric an experienced curtain maker would say that the fabric ‘needed taming’ and that a light cotton inter liner should be used. In addition to that the following details should be followed:

• The interlining should be locked in with 3 inch stitches. This should not be knotted;
• At the leading edge the interlining should be serged and locked in;
• The hem should be herring bone stitched. The stitches should not be too large and should not catch the face fabric; and
• Because of the nature of the fabric, the hem should slightly break on the floor.

These are not generic solutions to all curtain static problem. But they should be considered by the curtain maker.

So we have seen that: the choice of material; how the design works when hung; and how the curtain is made up, all have impacts on the creation or dissipation of static.