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.
Highlight with a toothbrush. Several testers shared a smart trick for subtle results : Use a dye kit two shades lighter than your color and paint on highlights with a clean toothbrush or mascara wand. Place them sparingly where the sun would hit around the hairline and stemming from your part, Hill suggests. Start from the top : Since roots need the most color (and processing time), apply dye there first, then comb through the rest of hair to distribute it. Work in four to six sections, like pros do in the salon, to ensure full coverage.