Wait until the quilt is quilted. Then, for the first wash, use Synthrapol. Synthrapol requires *hot* water and lots of it! Basically what it does is suspend unset dye particles in the water so they can be rinsed away. You need lots of hot water to keep the bleed as fully diluted as possible. A home front-loading washing machine does not use enough water. You can use either a home top-loader or a laundromat's largest front-loader. Be aware it may take several runs through with the Synthrapol to get all of the bleed out. During this time, be careful not to allow the damp quilt to sit on itself (which encourages "crocking" or dye transfer). When done, remove the quilt from the washer promptly and toss into dryer (or lay out on floor to dry).