When I got back into working on quilts a friend of mine informed me of the color catchers. I purchased extra fabric of the yardage I wanted (red) and washed it in hot water. I used 2 color catcher sheets. One for the first wash then that had a lot of color in it. I decided to wash it again and used the 2nd sheet. I also threw in a white piece of material that had an old tear in it. The catcher had a little hint of pink and the bigger piece of material (a cotton towel)had no color I could see. Then I threw it in the dryer on medium heat. I then put a small piece of it into a small bucket with soapy water and a small piece of catcher. After 20 minutes, I pulled both pieces out and put the white catcher against another piece of the catcher and looked good. So if I have to use reds or like colors I will use the catchers and wash in very warm water. I just buy extra yardage.