Martindale Rub Test Information for upholstery has been updated in one downloadable pdf document. I have put together a few posts I have made into this one file.
Share & Enjoy!
13 July, 2010
Martindale Rub Test – Updated Information
Posted by Verity du Sautoy under Upholstery, Upholstery Fabric | Tags: contract fabric, upholstery fabric, upholstry fabric, textured upholstery fabric, contract fabrics |Leave a Comment
19 June, 2010
Mohair Velvet, Silk Velvet: How to upholster using it
Posted by Verity du Sautoy under Fabric Tips | Tags: contract fabric, contract fabrics, domestic fabric, domestic fabrics, Fabric Tips, linen velvet, mohair velvet, mohair velvets, silk fabrics, silk velvet, textured upholstery fabric, upholstery fabric, upholstry fabric, velvet, velvets |Leave a Comment
Mohair Velvet and Silk Velvet buyers consider this: You have just invested a considerable amount of money in a high quality silk velvet or mohair velvet. Are you really considering upholstering with it yourself. Use an experienced upholsterer who, to be brutally honest, should not need the instructions that follow.
Some velvets are woven with a nap others are not. It is not a problem either way. If there is a nap you need to know which way it goes as that affects the process of upholstering. When you run your hand down the mohair velvet or silk velvet the smoothed direction indicates the direction of the nap. Remember this, it is important.
I’m assuming that you have already checked that the fabric is not damaged and that each piece is from the same dye lot.
The nap should be upholstered downwards for:
- the back;
- the seat; and
- side surfaces.
The nap should be upholstered from the outside inwards for:
- arm rests.
How do you flip your cushions? Top to bottom or left to right?
Most people flip from top to bottom. It is therefore standard upholstering practice to upholster the front and the back the opposite way. IE when they are flipped over the nap is the same.
You should use a layer of wadding between the foam and the fabric. The wadding can be either cotton or synthetic it does not really matter but check with any fire rating requirements. Again check that you are using the right kind of foam but HR foam or cold foam are both fine.
However if the pile is vertical then we advise the additional use of a cotton slip-cover.
Going back to the foam for a minute we advise that you use white wadding. In certain circumstances it is possible that grey wadding will ‘bleed’ causing marks on your beautiful Mohair Velvet. For example this may be caused from moisture used in the cleaning process.
Always use wadding on the arm rests as a protective layer to help eliminate ‘sharp’ edges. Using wadding on arm rests will thus reduce wear and tear considerably.
For the piping never use synthetic piping cord, always use cotton piping cord. As with the arm rests this will reduce wear and tear by eliminating the ‘sharper edges’.
Again to reduce wear and tear also use the length of the fabric to make the piping. this will look better as well.
Happy Upholstering
14 June, 2010
KOTHEA 2010 Fabric Collections
Posted by Verity du Sautoy under Stuff We're Doing | Tags: contemporary fabric, contract fabric, contract fabrics, curtain fabric, cushion fabric, domestic fabric, domestic fabrics, fake leather, faux leather, interior design, mohair velvet, mohair velvets, natural linens, textured upholstery fabric, upholstery fabric, upholstry fabric, velvet |Leave a Comment
Finally! Our summer collections have been decided and we will begin to introduce the new designs and colourways throughout the remainder of this year. We have been inundated with new work in the first part of this year causing our blog posts to be curtailed and our ‘spring’ collection to nearly be an autumn/fall collection. Not that we really do seasonal collections in any case.
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!
1 April, 2010
What is the Martindale Shade Change?
Posted by Verity du Sautoy under Upholstery, Upholstery Fabric | Tags: upholstery fabric, upholstry fabric |Leave a Comment
There is not a Martindale Shade Change test as such.
You have probably been referred to the Martindale Rub test by someone looking to know how durable your chosen fabric is to abrasion. the Martindale rub test result is particularly useful in indicating if your chosen fabric is suitable for the intended use. An indispensible indicator for interior designers.
The Shade Change is something different. Martindale tests are routinely undertaken on fabrics especially in the UK. In other countries there are different tests like the Wyzenbeek in the USA. However it is becoming more common in the UK that as part of the Martindale test a Shade Change test is also undertaken.
When a fabric has been ‘rubbed’ by a machine 3,000 times the Martindale test is paused and the fabric is examined to see how the shade of the fabric has changed. It is then given a mark out of 5 with 5 being the best result (least change).
A natural property of fabrics is that they wear with use. I guess one way of looking at the shade change test is to determine how much of that wear will be visible after a reasonable amount of use. With 3,000 rubs being classed as reasonable. It does not mean that your fabric will wear out after 3000 rubs, it has nothing to do with wearing out!
If your fabric has a Martindale result of 50,000 rubs this means that the structure of the fabric starts to break down after 50,000 rubs. Essentially the ‘rubs’ simulate to varying degrees how people will sit down repeatedly.
30 March, 2010
Getting a better Martindale abrasion test result for interiors fabric
Posted by Verity du Sautoy under Upholstery Fabric | Tags: textured upholstery fabric, upholstery fabric, upholstry fabric |1 Comment
Rumours abound that different testing houses give different Martindale abrasion test results for the same fabrics. Is there any truth to that?
Probably not.
Sometimes the tests can be carried out differently and so the results are different. There is a British Standard for abrasion testing which specifies how the test is done, if it is done in a different way then that may affect the result.
For example if we ‘know’ that a fabric is going to achieve about 35,000 Martindale ‘rubs’ then we would ask the testing company to test to 40,000 or if we were uncertain of the likely result we would ask them to test to end-point.
It is usual practice for the fabric to be rubbed in increments of 3,000 or so at a time. Clearly it is easier if a machine is left to run for 30,000 rather than 3,000 and then reset 10 times. Also the ‘correct’ (latter) way will give an accurate result of exactly when the fabric wears out.
I’m not sure why this is done not having read the British Standard myself in detail; maybe the fabric tension on the machine is meant to be checked every 3,000 rubs?
Anyway, if the test is not done properly then a LOWER result will be obtained.
So, providing a reputable testing house that is properly accredited has undertaken the test then it is safe to assume that the result is accurate. Of course the fabric piece that you buy may vary ever so slightly and this might cause minor variations. But that is the nature of some fabrics. A fault in the fabric may also cause it to wear out much quicker than expected but that fault should normally have been spotted by your upholsterer before they used it.
16 March, 2010
What is UK FR treatment BS7176 BS5852 Crib Test?
Posted by Verity du Sautoy under Contract Fabric, Upholstery Fabric | Tags: contract fabric, contract fabrics, upholstery fabric, upholstry fabric |1 Comment
Summary: Broad Answer – it is a watersoak plus ‘normal crib 5′ plus cigarette test plus match test. Now read on for the detail.
For contract upholstery fabric in the UK your fabric needs to be treated to pass BS 5852 Part 2: 1990: Source 5 (Crib 5). So when you are getting a fabric treated you should ask for it to be treated to that standard. As a designer that is all you should normally have to do.
Now, you have to get the treatment undertaken at a UKAS accredited company. That means they will do it properly. There are a variety of ways of treating fabrics to meet the standard. You don’t need to know them all, that is the job of the treatment house. Just tell them what standard it needs to achieve AND that you will be getting it tested independently afterwards (that encourages them to do it properly). For safety also say that the fabric will be subject to a watersoak (more of that in a minute).
The reason for doing this is that some older treatment methods are ‘legal’ within the BS but they can fail the test. This is because the treatments can contain phosphorous based chemicals that wash out. And the problem with that is that, if a fabric is not inherently fire retardant, then part of the test will involve it being soaked in water. Hence all the hard work put into the treatment is washed away and the test may well be failed.
Some treatment houses do not have some of the more expensive machinery required to undertake some of the treatments. Many just immerse in a fire retardant bath of chemicals.
As part of the treatment some treatment companies will also carry out an indicative test. You should get a certificate to confirm this after treatment. This means that essentially your fabric should pass the crib test. But the crib test itself has not been carried out as that takes a while.
You probably need to check with your client if they are happy with this indicative test or if they want to pay the extra to have the full crib 5 test done with the time delays that involves.
It’s a fire regulation. You have to do this properly and take it seriously, you would be surprised that several companies do not and the repercussions of not doing it are great indeed.
In summary then and as a minimum you should:
1. Ensure you are dealing with a UKAS accredited treatment company.
2. Say “Please treat this fabric to pass BS 5852 Part 2: 1990: Source 5 (Crib 5)”
3. Say “It will be watersoaked and tested afterwards.
4. Say “Please perform an indicative test at the end of the treatment and give me a certificate of treatment”
Simple enough?
Well, actually no. What I have said above stands as generally true. Most of the UK fabric companies and designers work with Crib 5. However there is a slightly higher level of testing and certification called BS7176:1995. Strictly speaking I would say that everyone should use this standard…but they don’t.
When would you use this? When a bit more certainty is required. The BS7176:1995 test includes the Crib 5 test and also a cigarette and match test and also a watersoak. When specifying the test you would need to say how the fabric will be used e.g. in a hotel, in a prison, in a restaurant, in a hospital, offshore installation, and so on. These types of end-usage environments determine the HAZARD CATEGORY of the test that is undertaken. Additionally you will need to specify the EXACT foam that will be used in the installation, so the test will mimic the final end-use environment as much as possible.
So do you ask for your fabric to be treated to BS7176:1995 Medium Hazard? Well you can, it won’t hurt. But the treatment will be the same as for Crib 5. Some of the UK fabric treatments houses that we spoke to have not heard of this British Standard, which was surprising.
So really it is ‘simple enough’ as far as the treatment goes. Treat to Crib 5.
Testing is more complicated. Essentially you are getting the fabric tested to ensure it will work in a specific situation as we’ve already said the treatment is the same as for Crib 5. If you are in a complex environment you should get an expert involved. My understanding also is that if you are planning to sell furniture to the contract market then achieving a BS7176 pass will allow you to label your product as being suitable for certain environments.
4 March, 2010
Dye Lot Samples vs. Stock Cuttings
Posted by Verity du Sautoy under interior design, interiordesign, interiors | Tags: cushion fabric, upholstery fabric |Leave a Comment
What is the difference between a dye lot sample and a stock cutting?
In the UK those phrases are taken to mean the same thing. But that is not universally true so I will explain.
When you as an interior designer are about to place an order you need to get a cutting which you keep in your records stating exactly what colour the fabric will be. So you need a cutting from the exact roll of fabric which is going to be cut for you by the supplier. Once you have a this “dye lot sample” or “stock cutting” the onus is then on the supplier to supply you with the exact fabric.
Is this always important?
This is particularly important as the colour of many fabrics vary slightly between different batches of production. This is common across all suppliers.
Usually, however, it will not matter if your ENTIRE order comes from a roll that was different from the original sampling. The difference will be trivial and not noticed.
But if you are being supplied with more than one piece then it often DOES matter. The different rolls of fabric when made-up side-by-side can be noticeably different.
Sometimes even if the fabrics are different; the way they are made up, the lighting or where they are in a room can make the difference not noticeable.
Various technical reasons explain all of this, such as the variability of colour in man-made dyes, however designers need only know that it can and often does happen that fabrics vary slightly in their colour.
If in doubt obtain a dye lot sample/stock cutting.
8 January, 2010
Velvet
Posted by Verity du Sautoy under Contract Fabric, Domestic Fabric, Product Comments, Upholstery, Upholstery Fabric | Tags: contract fabrics, linen velvet, mohair velvet, mohair velvets, silk velvet, silk velvets, textured upholstery fabric, upholstery fabric, upholstry fabric, velvet, velvets |Leave a Comment
Velvets have become increasingly popular over the last 5 years. Both residential and contract usage of velvets have increased tremendously. Having been produced for hundreds of years velvets never seem to have lost the attention of discerning designers.
Interior Designers are often interested in the properties and manufacture of velvet – the two being necessarily related. The depth of the pile, the durability of the finish, the ease of maintaining the beautiful finish.
Velvet is made in one of two ways – cut or uncut:
1. Cut pile
a. Here the loom is configured to (more…)
13 December, 2009
Faux Leather Skin – Heavy Contract Upholstery Walling
Posted by KOTHEA - Passionate About Fabrics For Top Designers under Contract Fabric, Panelling & Wallcovering, Press Releases | Tags: contract fabric, contract fabrics, fake leather, faux leather, interior design, textured upholstery fabric, upholstery fabric, upholstry fabric |Leave a Comment
LONDON, England. 07-DECEMBER-2009 11.30 AM: KOTHEA today announced it has expanded its extensive contract faux skin collections by the addition of KOFAUXLEATHER. KOFAUXLEATHER is a high durability, faux leather: a superb contract fabric with a very high Martindale result. It simply and effortlessly delivers longstanding elegance in all the right bars, hotels and marine environments both as upholstery and as a wall or door covering. It looks great.
KOFAUXLEATHER
Reference: 04-003-378
Colour Shown: Marle
Other colourways: 18
Width: 140cm
Repeat: none
Composition: 100% Cotton basecloth, 94% vinyl 6% polyester coat.
Martindale: 100,000++
Primary Usage: Heavy contract upholstery and walling.
Type of fabric: Faux Leather / Faux Skin
About KOTHEA.
KOTHEA are a (more…)
21 July, 2010
The Cigarette & Match Tests BS 5852
Posted by Verity du Sautoy under Domestic Fabric, Upholstery, Upholstery Fabric | Tags: domestic fabric, upholstery fabric, upholstry fabric, domestic fabrics |Leave a Comment
You can download this document by clicking on the pdf icon.
The cigarette and match tests fall under BS 5852. The test(s) involve the fabric being exposed to different ‘ignition sources’ essentially simulating possible real life causes of domestic fires. The ‘ignition sources’ are ways that the fabric could plausibly be burnt. There are 8 different sources/types of combustion but you only normally need to deal with sources 0, 1 and 5.
Source 0 = Cigarette (smouldering cigarette)
Source 1 = Match (simulated match)
Source 5 = Crib. (Wooden crib or Crib 5)
Source 5, or Crib 5 as it is frequently know as, is usually a contract standard for upholstery. In contract upholstery you might also come across BS 7176 which determines specific risk or hazard areas that your fabric is being installed into. In simple terms, BS 7176 covers all 3 of the above tests. Furthermore, whilst Crib 5 is the highest standard of the 3 tests it does not follow that a fabric which passes Crib 5 will also pass the cigarette and match test – even though it is likely to.
Exceptions, Mandates & Exemptions