I purchased a kit for twin size bed for dgd which consists of a white tone on tone background and all the fabric which came with it are fat-eights (there are a total of 90 in all). They are all BRIGHT colors. I feel these fat eights are too small to put into the washing maching. I remember reading another post long ago about some product to use to prevent bleeding but I can't remember what it was. Also, would you use these products after completing the entire quilt or should I soak in a tub before putting together? Please help - I don't want to take a chance of all these colors bleeding on the beautiful white background.