Originally Posted by the casual quilter
I prewash fabric the same way I do my laundry. I wash in cold water and dry on regular heat. I use detergent but not fabric softener. I do use Color Catchers especially with reds and purples. If the Color Catchers seem really saturated with dye when I finish, I'll re-launder with another Color Catcher.
Ditto. Be sure to not put light colors in with the red even if you use color catchers. And yes, a second (or more) washes till the red run off is gone!