I have not worked with batiks before but have a Kiwiberry jelly roll I've had for a couple years. Didn't know what I would ever do with it. I saw Eddie's tut on cathedral windows and want to do one with the jelly roll and white cotton for the background. My question is if I rinse these strips out enough to where they don't seem to bleed anymore can I trust that? I would hate to make this and then have them bleed more into the white background. I would really appreciate hearing from all you who know your batiks!