quiltflower, you might purchase a bottle of Retayne and try that . It is supposed to hold the dye in the fabric and keep it from bleeding on other fabrics. I have used it with some fabrics and didn't find any color in the water after using retayne, but I haven't put the fabric in a quilt yet and I can't say for sure if the fabric would have bled to begin with, but I really messed up a double wedding ring quilt I made my daughter, when I washed the quilt after I made it, and I had prewashed all of the fabric, before cutting any of it and some of the dark green bled onto the cream and other fabrics in the quilt. I did not know about Retayne at the time. I really can't say if it works or not, but it is worth a try to find out. Gerbie