Use the Best Shampoo on Color_Treated Hair : When you wash color_treated hair, be sure to use a color_protecting shampoo. Using a good shampoo will help your color last longer and help maintain the health of your processed hair. Avoid Sulfates on Color_Treated Hair : Sulfates can strip color from hair, so look for a sulfate_free shampoo. Sulfates contain salt, which strip away moisture, and moisture loss is one of the main causes of color fading. Use Clarifying Shampoos on Color_Treated Hair Only Before Coloring : Clarifying shampoos can strip hair color because contain a high level of detergent in order to deep cleanse and remove build_up of dirt and hairstyling products, so avoid using them unless it’s right before you are going to have your hair colored. If you have gray hair you are covering, look for a clarifying shampoo that removes hairspray resins, silicones and waxes.
Use two mirrors : Coloring the back of your head can be tricky. As you apply dye in front of your bathroom mirror, hold up a handheld one to ensure you don't miss spots, Hill recommends. Have cleansing cloths on hand : Use wipes like Neutrogena Makeup Remover Cleansing Towelettes to soak up any dye splatters as they happen. If you wait until you're done, they may have already set. ("I still have stains I can't get off!" one tester sighed.)