I would wash like colors together with a Color Catcher. Check the color catcher, and wash a couple of times. Or use retayne with the directions, then wash with a color catcher to see what happens. I have had trouble with batiks not working with retayne, so I now do a 2 step wash. I also now hang dry fabric as I wash in warm/hot water, I like the crispness after ironing and before cutting.