What I have trouble understanding is why so many quilters prefer to use Synthrapol or Color Catchers wash after wash after wash instead of prewashing their bleeding fabrics once, maybe twice, in Retayne. (around here, if it bleeds after two treatments, it goes in a non-washable wall quilt)
Testing for colorfastness is quick, easy, and does not involve wetting the entire piece of fabric. If it bleeds, treat it with Retayne. If it doesn't, why waste your money on Color Catchers? And why put a laundry restriction on a quilt that you gift?