Wella Professional Koleston Hair color Creme kit contains highly effective pigments, developed by Wella experts, for long lasting intense color and perfect grey coverage.It is the first Hair coloration brand introducing an Oil Replacement sachet for extraordinary post coloration treatment.Features & benefits: Intense Long Lasting Color Perfect grey coverage Oil Replacement Treatment Preparation:Press the content of the tube into a non-metallic dish (plastic, glass or porcelain), then add the developer fluid and mix the two ingredients with a coloring brush until thoroughly combined. Apply the emulsion to your hair as soon as you have finished mixing it.