How to use: For a correction, total color: Apply to dry hair. In a mixing bowl plastic mixing equal parts of repair color system 1 and 2 by covering his hands with gloves. Shake the product a few seconds and quickly use. After you have applied the producot, cover the head with a cap of plastic and leave it on for up to 20 minutes, checking often the effect on the hair. Rinse hair for 3-5 minutes with a shampoo for hair treated. For a partial correction of the color: Apply to wet hair, dried with a towel.