Permanent color. Provides perfect coverage of up to 100% of white hair. Rich, deep, and intense color with perfect coverage of white hair. Can darken and lighten up to 3 levels. With the expertise of your professional hairdresser and in-depth color consultation, you can achieve your perfect shade.Ionène G and Incell™ advanced technologies reach all 3 levels of the hair to treat the entirety of the hair fiber. A hair colorant can cause an allergic reaction. A skin allergy test must be completed before each application of any hair colorant. Follow the safety instructions on the leaflet.Maximum fading (2 - 3 levels)• Apply target shade to re-growth.• Apply a small amount of warm water to the mixture.• Add a 3-inch ribbon of a color-match shade (see color-matching guide) to the remaining mixture.• Apply to mid-lengths/ends immediately after re-growth application.• Process for full development time.* A color match shade is a Majirel shade that is warmer than your target shade.Virgin Application:•Apply the mixture to the mid-lengths/ends ½ inch from the scalp.• Develop for 15 minutes.• Apply the mixture to the re-growth and re-apply to mid-lengths/ends.• Process for full development time.