generally with cut kits it is recommended to not pre=wash the fabrics, the kits are cut to allow you enough to make your quilt with what is there. if you are worried about any of the fabrics bleeding you could take the worrisome ones to the sink wet them and check to see if any color comes off on a paper towel or cotton cloth, if no color worries then no worries, wash your finished quilt when you are ready to just hug it! :thumbup: