I use Retayne. It is not that expensive as you only use a small amount. I put small pieces of fabric in a glass canning jar with hot water and Retayne then let it set for about 30 . I gently shake the jar a little from time to time, then rinse thoroughly. Do not ring out. Roll in a towel if you must then hang to dry. This has worked for me for batiks and other bleeding fabric. I always give my fabric the bleed test with a corner stuck in warm water for a few minutes before I wash things togethter.