I wash similar colors on the HOT setting with my regular detergent and color catcher so I can be aware if I have a bleeder and get any shrinkage out of the way. If I there is color on the color catcher, I double check the suspected offenders (deep saturated colors or batiks) by it self in plain water. Sometimes it is just excess dye being released. If I have a bleeder I wash again in HOT water with Retayne. No fabric softeners, no dryer sheets, I find those are usually the worst offenders when it comes to added fragrance. I dry the fabric in the dryer until it is barely damp then iron it and put it into stash. Once the quilt is done I wash it in cold water from then on out, regular laundry detergent and tumble dry unless it is a show quilt, that I will wash and block to dry. I like to make sure a quilt can be easily machine washed and dried before gifting it. I also want to be sure all seams and quilting is ok and doesn't come apart in the wash. I've only gifted one quilt to charity and it was going to Romania so no health issue was involved, it was going to the poor.