synthropol keeps dyes suspended in the water- so they don't 'bleed' onto other fabrics- so wash with synthropol- color catchers help grab the dye too...but the synthropol should help you to wash away the fugitive dye & keep it from getting on other parts of the quilt- it is important to follow the instructions- and don't dry (or heat-set) the dyes before you have removed all the fugitive dye. you may be able to (pre-treat) the area that is 'stained' by using a product just on that section (like shout or oxyclean) ... color catchers work well too if you can't find synthropol-