Thanks for posting this thread as I have 2 projects I need help with and they are gifts so I can't mess up! I purchased some batiks that have an ombré effect going from dark to very pale (dark green to light etc) they are green, red, light orange and brown. So I prewash with Retayne? Do I put a color catcher in also? Do I wash them together or each separate? I also have hand dyed fabrics ranging from dark brown to a light mocha for a wall hanging for my son and a focus fabric of dark brown and metallic gold put on top of blues/greens batik ( brown and gold do not show on the wrong side). I would prefer not to prewash these, but down the road when it needs to be cleaned from hanging what is the procedure- dry cleaning? Hand washing? I'm sorry I have so many questions in one post, but I don't want to ruin anything! Bought fabrics at the Raleigh Quilt show and they would be very hard to replace.