Schwarzkopf Professional Essensity 7-77 is a permanent color without ammonia with Phytolipid Technology, allowing blended, natural and multi-tone color results. It covers gray hair and is free from artificial fragrances. Essensity Permanent Hair Color is available in an assortment of shades that reflect natural light, respect the multi-tone of hair highlights and allow coverage of gray hair as well as up to 4 tones of lightening. It is advisable to mix the colorant with the oxidant (sold separately) (Vol 8%, Vol 18%, Vol 28% or Vol 38%) in a non-metallic bowl. Apply the dye: divide the hair into 4 parts to facilitate the coloring work. If you have gray hair, start by applying the product from the root using the brush, gradually apply the product all over the hair. Once the impregnation on all the hair leave 30 to 45 minutes of exposure. Once the exposure time is over, wash with plenty of cold or lukewarm water until the water runs clear and stops "spitting out" the hair dye. Store in a cool, dry place.