I would just test a small corner of each color and see if when it hits the water it bleeds. if it doesn't or it is very minimal I would go a head and run with it. if there is bleeding. I would just set them all in luke warm water in the sink with retain or synthrope. then let them air dry. this will help keep the shrinkage to a min. this is how i was all my batiks that I think will bleed. and if you are in a cold area, then let them sit outside in the cold air. it will dry them faster. well as long as the humidity is low. hope this helps.