To use Atomic Turquoise hair dye, first, if your hair has yellow tones, tone it to get the best color result. If your hair is unbleached, it will still get some turquoise tones, but for the brightest look, lighten your hair to level 10 blonde. Then, apply the cream - based dye evenly to your hair. Leave it on for the recommended time on the package. After that, rinse your hair thoroughly. Before using this product for the first time, do a patch test on a small area of your skin. Wait 24 - 48 hours and if there's any redness or itching, don't use the product. To maintain the color, use color - safe shampoos and conditioners. Avoid excessive sun exposure as it can fade the color. Also, try not to wash your hair too frequently as it can make the color go away faster.