A color catcher is a piece of fabric that has a chemical on it that will catch color that bleeds out of fabrics that you are prewashing to check for color fastness. They look something like a dryer sheet. I have reused them and never had a problem with them. Shout Color Catcher Dye-Trapping Sheet Keep the color of your clothes as bright and vibrant as your energy. Shout Color Catcher Dye-Trapping Sheet absorbs and traps loose dyes in your wash water, protecting your clothes against damage from color bleeds and helping preserve those vibrant original colors.
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