The Basics Helps dyed clothing retain its color intensity over time. The Benefits Increases wash fastness, stops bleeding and helps prevent back staining when laundered. The Uses Use with iDye natural fabrics. The Pro Tip After washing garment with iDye, rinse out the excess dye. Then place in washer with warm water and 2 tablespoons (per pound) of Dye Fixation. Wash and dry as normal.