If you do wash possible bleeder fabrics add 1 cup of white vinegar to the cold water wash and let it agitate for a moment or two then let it soak for about 20 minutes. The vinegar helps the dyes to set. You may have to do this more than once as some fabrics have a huge amount of dyes in it. Also dry the fabric in the dryer as the heat will also help "set" the dyes.Hope this helps.