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How To Avoid Dye Migration: Using The Wet-White-Cloth Fabric Test
This is the single most vital piece of advice any new doll owner can receive, and it's also the one that's most regularly ignored. The process is called dye migration: dark fabric transfers colour onto the doll's skin, and after that it's permanent. Once a stain has been absorbed into TPE, no cleaning item, approach or amount of scrubbing will remove it. Your only defence is stopping it, and that begins with an uncomplicated, free test that takes two minutes.
 
Oil Meets Oil
This occurs for reasons of chemistry. TPE is an oil-based material, and dark dyes are typically oil-soluble, which means the dye migrates from the fabric into the TPE like water soaking into a sponge. Contact starts it straight away, and heat and pressure make it quicker; a few hours in a dark dress in a warm room is enough to cause a permanent stain. While pale dolls show it especially obviously, since dark marks are impossible to miss, it takes place on every skin tone to some degree.
 
Test From an Inside Seam
The test itself couldn't be more straightforward. Cut off a small piece of fabric (an inside seam where nobody will see is ideal) and get it thoroughly wet with clean water. You'll need something white to rub against, whether that's a cloth, a cotton bud or kitchen paper, and about thirty seconds of firm rubbing. When any colour transfers to the white cloth, it's a fail: the fabric will stain your doll, and she shouldn't wear it. If nothing shows up on the white cloth, the fabric is safe and you can use it without worry.
 
Dry Fabric vs Damp Skin
Because the dye transfer is activated by moisture that's naturally present on the doll's skin, the test uses water to simulate it. If dry fabric on dry skin transfers less dye than wet fabric on damp skin, then testing with water gives you the worst case, and that's exactly what you want. Usual use is safe for fabric that passes the water test. When it fails it will stain, and there's no way round it.
 
Manufacturing Processes Change
Don't assume a brand you've used before is fine: repeat the test for every new piece of clothing. What was safe last year might not be this year: manufacturing processes change, and dye batches vary. Years of looking solid versus permanent dark marks on her thighs hinge on a test that takes two minutes. No excuse exists for skipping it; buyers who learn this the hard way end up acquiring replacement dolls.
 
Black, Dark Red, Dark Blue and Dark Purple
A slightly waxy or coated feel, a dark colour or a cheap dye each makes a fabric more likely to fail the test. Concentrated, oil-soluble dyes: that's what black, dark red, dark blue and dark purple are dyed with, and why they're the worst offenders. Bright neons carry risk too, because substantial amounts of pigment go into them. Cheaply dyed fabric is more likely to bleed than properly dyed fabric, so expensive clothing is regularly safer than cheap clothing, though the difference isn't guaranteed.
 
What to Reach For
You'll be safest with light colours, natural fibres and anything that's been pre-washed. Pigment is the issue, and white, cream, beige and pale pastels don't have enough of it to cause visible staining, so they're nearly invariably safe. Synthetics let go of dye more readily than cotton, linen and other natural fibres, which tend to hold it more firmly and so bleed less. Most of the excess dye has gone from pre-washed fabric, which makes it less likely to transfer onto the doll. When in doubt, pre-wash any new clothing before putting it on the doll.
 
Some Fabrics Bleed No Matter What
If a fabric fails the test, there are a few things you can attempt before giving up on it. Setting the dye and cutting down on bleeding is what a number of hot washes with a small amount of white vinegar can do. Salt binds the dye to the fibres, acting as a mordant, so leaving the fabric in a saltwater solution overnight can also help. If you really want to use a specific piece of clothing, try them, but don't count on it: some fabrics will bleed no matter what you do.
 
Mitigation Strategies for a Favourite Piece
Safest by far is to not use a fabric that still fails after washing. You can replace a piece of clothing for far less than the cost of a new doll, and a stain on a doll is permanent.A few mitigation strategies exist for the attached owner who wants to use the fabric in any case. A lining of light-coloured fabric on the inside of the clothing puts a barrier between the dark dye and her skin. Or limit it to short durations only, taking it off right away after use. Neither of these is foolproof, but they lessen the risk.
 
Where to Shop Safely
Seek out vendors who grasp dye migration and have tested their fabrics when you're buying clothing for a doll; it's the safest approach. Their clothing is more expensive but also more reliable because doll-specific clothing brands are typically aware of the issue and select their fabrics accordingly. With generic clothing from high street shops you're gambling, and cheaper clothing means higher risk. Purchasing generic? Invariably test it before use.
 
Test More Thoroughly in Summer
It's also worth knowing there's a seasonal factor. Heat accelerates the process, so dye migration is worse in warm weather. A fabric might pass the test in winter and fail it in summer; a warm room for storing the doll makes that especially likely. If it's summer and you're purchasing new clothing, test it more thoroughly and consider washing it a number of times before use. Storing a doll in a warm room calls for the same care, since the heat will cause any residual dye to migrate faster.
 
Understanding the Stain
It's worth understanding the stain itself, should it happen. Because the dye spreads through the material rather than sitting on the surface, dye migration stains are ordinarily diffuse rather than sharp. Look for general darkening or discolouration of the zone, not a clear outline of the fabric. It gets more apparent over time because the stain spreads and deepens, although it's harder to spot originally. Cover it with clothing, or accept it as part of the doll's history: once it's set, those are the only alternatives, because it can't be removed.
 
Test Wet, Not Dry
Testing approach matters every bit as much as the test. Don't skimp on the thirty seconds of rubbing, because a quick rub can miss a slow bleed. Rub hard enough that you could be trying to remove a stain; the fabric will experience that pressure against the doll's skin. A stained patch from a previous test would muddy things and give a false result, so each test needs a fresh section of the white cloth. Fabric goes in wet, not dry, because it's water that activates the dye transfer.
 
Test the Darkest Section First
With a multi-coloured fabric, test the darkest section first. The dark sections of a fabric are what will stain the doll, and they might fail even if the light sections pass. Watch fabrics with dark patterns on a light background notably closely; the dark parts bleed. When unsure, test each colour separately.
 
Cumulative and Irreversible
Contact time is the next question: how long before a fabric stains the doll? The fabric, the temperature and the pressure decide it, and the answer varies hugely. There are fabrics that will stain within an hour and others that take days or weeks. A failed fabric is a future stain, as far as the safest approach goes, so stay away from it totally. Don't look for a safe exposure time with a fabric that bleeds; the bleed is cumulative and irreversible.
 
Factor the Cost of Covering Stains Into the Price
If the doll is used, dye migration is worth checking before purchase. Dark patches on the thighs, back or buttocks are what to look for, as these are the most widespread regions for staining. The stains are permanent and impact the doll's appearance, which is why a doll with evident dye stains is worth less than one without. Used with stains? Don't pay full price, and remember to factor in what covering them would cost, whether that's clothing or a new body.
 
Stopping the Most Common Permanent Damage
A doll owner can develop plenty of habits, but the wet-white-cloth test is the single most critical. It prevents the most common cause of permanent damage while taking two minutes and costing nothing. Testing every new piece of clothing should become part of your routine; being in a hurry is no excuse to skip it. The five minutes saved by skipping the test could end up costing you a doll. More info at this rosslink. Also check out  continue reading this (http://my-xanadu.org/viewtopic.php?t=12068) bearing in mind  view website (http://team-uber.com/forum/viewtopic.php?f=3&t=1660) and  get more info (https://pari-ot-internet.com/viewtopic.php?t=5853) for more.