Waterproof and stain-resistant finishes resist wetting by water and therefore resist penetration of the dye. If the fabric is dyed, the resulting color will be as much as 50% lighter than the package color. We do not recommend dyeing these fabrics. Wash-and-wear, permanent press, and crease-resistant finishes create a resistance when dyeing and will result in much lighter colors. It is recommended to wash a new fabric or garment in warm water and laundry detergent prior to dyeing. This helps to remove any finishes that may interfere with dye absorption.