If it were me I would use Synthropol with Color Catchers AFTER quilting or tying, soaking it in hot water in the bathtub, then pressing most of the water out on the sides of the tub before carefully lifting out. I would then put in the washer on a delicate cycle to cold water rinse and spin and lay flat to block and dry. Good luck. I haven't had any bleeds on the fabric, but plenty of color caught in the Color Catchers. Hope this helps. Retayne as I understand it is to set the color in hand dyed fabrics, as synthropol is used to suspend the dyes so they can be safely rinsed away. Correct me if I am wrong please.