From what I know, the dye is actually supposed to penetrate the yarn, not just sit on top of it. At least none of my own pantyhose shed colour. But I hear about this kind of stuff happening to other people.
For example, women on dance forums complain that their dance hosiery fades after washing.
Any idea why? Cheap brands? Chinese production?
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I have never noticed that. The only thing I have noticed is that colored hoses get a lighter color because they get worn.
I haven’t had that problem yet, though I’ve rarely washed hosiery in a washing machine. I have used a product called Ovacion to hand-wash them, don’t mix colors if you do that because a few splotches of one color can get on the other pair.
USE A LITTLE VINEGAR IN THE FIRST WASH TO SET THE COLOR.
I should try that, thanks!