Goldwell Topchic The Mix Shades Permanent Hair Color will guarantee bold, intense colour with optimum results across the range with 100 percent grey coverage. The Coenzyme Technology helps to create a smooth, flawless finish meaning your hair is protected from external impurities. The built in equaliser system will help create even colour results from root to tip. This is the first professional colourant product to have Cool Protect Technology which enables the colour to stay cool over time increasing durability. For professional use only.