My Community

Steering Clear Of Dye Migration: How The Wet-White-Cloth Fabric Test Works
Regularly ignored, and yet it's the single most important piece of advice any new doll owner can receive. Colour moving from dark fabric onto the doll's skin is called dye migration, and it's permanent once it has happened. You can't remove a stain that's been absorbed into TPE, whatever cleaning goods, approach or scrubbing you throw at it. Start with an uncomplicated test of two minutes that costs nothing, because prevention is the only defence there is.
 
Every Skin Tone Is at Risk
Blame chemistry for this one. Oil likes oil. TPE is oil-based, dark dyes are typically oil-soluble, and the dye migrates from the fabric into the TPE like water soaking into a sponge. A few hours in a warm room in a dark dress is enough to cause a permanent stain, because the process starts straight away on contact and accelerates with heat and pressure. Dark marks on pale dolls are impossible to miss, which is why it's particularly visible on them, though it happens on every skin tone to some degree.
 
The Test Itself Is Straightforward
The test itself is easy to do. Sample a small piece of the fabric, ideally from an inside seam where it won't be seen, and soak it thoroughly in clean water. Step two is the rub. Choose a white cloth, a cotton bud or kitchen paper and work the wet fabric against it, firmly, for about thirty seconds. Transferred colour on the white cloth means the fabric will stain your doll, and you should not put it on her. When the white cloth stays clean, the fabric is safe to use, without worry.
 
What Activates the Dye Transfer
Because the dye transfer is activated by moisture that's naturally present on the doll's skin, the test uses water to simulate it. Wet fabric on damp skin transfers more dye than dry fabric on dry skin, so the water test shows you the worst case, which is exactly what you want. Safe for ordinary use is any fabric that passes the water test. When it fails it will stain, and there's no way round it.
 
Never Assume a Brand Is Safe
Repeat the test for every new piece of clothing, even when you've used the same brand before. Safe last year doesn't mean safe this year, with manufacturing processes changing and dye batches varying. In two minutes the test settles whether you have a doll that looks good for years or a doll with permanent dark marks on her thighs. The customers who end up buying replacement dolls are the ones who learn this the hard way, and there's no excuse for skipping the test.
 
Neon Colours Are Risky Too
What tends to fail the test? Dark colours, cheap dyes, and anything that feels slightly waxy or coated. For the worst offenders, look to black, dark red, dark blue and dark purple; their dyes are concentrated and oil-soluble. Neon colours are dangerous too, since they use sizable amounts of pigment. Spending more often purchases safer clothing, since cheaply dyed fabric is more likely to bleed than properly dyed fabric, but the difference isn't guaranteed.
 
What to Reach For
Fabric is safest when it's a light colour, a natural fibre, or something that's been pre-washed. Because there's not enough pigment to cause apparent staining, white, cream, beige and pale pastels are practically invariably safe. Holding dye more firmly than synthetics, as cotton, linen and other natural fibres tend to, makes them less likely to bleed. Having released most of its excess dye in the wash, pre-washed fabric is less likely to transfer onto the doll. When in doubt, pre-wash any new clothing before putting it on the doll.
 
Setting the Dye to Reduce Bleeding
You can try a few things with a fabric that fails the test before giving up on it. It can help to set the dye and minimise bleeding if you wash the fabric a number of times, in hot water with a small amount of white vinegar. A saltwater solution is another option; soak the fabric in it overnight, because salt acts as a mordant that binds the dye to the fibres. If you really want to use a precise piece of clothing, attempt them, but don't count on it: some fabrics will bleed no matter what you do.
 
Lessening the Risk
When washing hasn't fixed the failure, the safest alternative is not to use the fabric. Because a stain on a doll is permanent, and a new doll costs far more than replacing a piece of clothing, it's not worth the gamble.A few mitigation strategies exist for the attached owner who wants to use the fabric in any case. Alternative one: a light-coloured fabric lining inside the clothing, which acts as a barrier keeping the dark dye away from the doll's skin. Alternatively, short spans only, and remove the clothing immediately after use. Neither approach is foolproof, but each lessens the risk.
 
Cheaper Clothing, Higher Risk
Safest approach? Retailers who've tested their fabrics and comprehend dye migration. You pay more for clothing from doll-specific brands, but it's also more reliable, because they're usually aware of the issue and select their fabrics accordingly. Acquiring generic clothing from high street shops is a gamble, with the risk increasing the cheaper the clothing gets. When purchasing generic clothing, test it before use, every time.
 
How Weather Affects Staining
One more thing worth knowing about: a seasonal factor. Warm weather makes dye migration worse, since heat accelerates the process. A fabric might pass the test in winter and fail it in summer; a warm room for storing the doll makes that particularly likely. Consider washing new clothing a number of times before use, and test it more fully, if you're acquiring it in summer. A warm room has the same effect when you're storing a doll, because the heat will cause any residual dye to migrate faster.
 
Once It's Set, It's There for Good
The stain itself, if it occurs, is worth understanding. Diffuse, not sharp, is what dye migration stains generally are, since the dye spreads through the material rather than sitting on the surface. They look like the whole region has darkened or discoloured, not like the fabric has left a clear outline. This makes them harder to spot initially but more plain over time, because the stain spreads and deepens. A set stain can't be removed. Your alternatives are covering it with clothing, or accepting it as part of the doll's history.
 
Pressure That Matches the Doll's Skin
As much as the test itself, the testing method matters. Cut the rubbing short and you might miss a slow bleed, so don't skimp on the thirty seconds. Rub firmly, as though you're attempting to remove a stain, because that's the pressure the fabric will experience against the doll's skin. Every test gets a clean patch of the white cloth, as a patch already soiled by an earlier test gives a false result. Wet fabric, rather than dry, is what you test, because water is what activates the dye transfer.
 
Multi-Coloured Clothing and the Dye Test
Testing a fabric with multiple colours? Start with the darkest section. A fabric might pass on the light sections but fail on the dark ones, and the dark sections are what will stain the doll. Any doubt? Test each colour on its own. And take particular care when a dark pattern sits on a light background, as the dark parts are the ones that bleed.
 
How Long Before the Stain Appears?
So how long does the fabric have to be in contact with the doll for staining to happen? You'll find huge variation, according to the fabric, the temperature, and the pressure. While some fabrics will stain within an hour, others take days or weeks. Assume it'll stain eventually. A fabric that fails the test should be avoided completely. A fabric that bleeds will keep adding to the bleed with every exposure, and it's irreversible, so no exposure time is safe.
 
Look at the Thighs, Back and Buttocks
For customers who are acquiring a used doll, dye migration is worth checking before purchase. Look for dark patches on the thighs, back, or buttocks, which are the most typical zones for staining. Permanent stains that affect the doll's appearance make a doll with apparent dye stains worth less than one without. Stains on a used doll mean extra spending on covering them (with clothing or a new body), so that cost belongs in the cost and full cost is off the table.
 
Final Word on Dye Migration
When it comes to maintenance habits, the wet-white-cloth test is the single most major one any doll owner can develop. It prevents the most common cause of permanent damage while taking two minutes and costing nothing. Work it into your routine so that every new piece of clothing gets tested, hurry or no hurry. A doll could be the price of the five minutes you save by skipping the test. More info at this rosslink. Also check out  blog (http://my-xanadu.org/viewtopic.php?t=13033) for more.