Originally Posted by Prism99

If you do wash, I wouldn't rely on color catchers alone. I would wash in Synthrapol, which is designed to suspend unset dye particles in the water so they can be washed away (instead of settling into other fabrics). I would use a top loading washing machine or else the *large* front-loader at a laundromat, as you want to have lots of water for unset dye particles to disperse into and you want to keep the quilt moving so the blue does not sit too long on anything else.

I agree with not drying the quilt if you see any bleeding. In that case, I would wash it again in Synthrapol. If there are bleeds, it can take several washings in Synthrapol to get them all out.

Do you have some scraps of the blue? I would test it to see how much it bleeds. Drop a piece into a glass of water and leave for a couple of hours. Rub the wet fabric against the white fabric to see if dye transfers.