[quote=Lisa_wanna_b_quilter]When I prewash -- which is seldom -- I use detergent and run it just like laundry. I always put similar colors together just as if I were washing clothes.
The first time I wash a quilt, I always use a color catcher even if I've prewashed the fabric.
Agree with the above.
I put in a Color Catcher (made by Shout) when I pre-wash - lets me know if anything ran. Just as an experiment, if you have time, you could wash (of just rinse) a 2nd time with a fresh Color Catcher and see if more dye comes out.