Use for longlasting, multidimensional color results. Featuring Soy 4 Plex technology, Clairol Professional Liquicolor Permanente provide the same 100 gray coverage and shade results as Miss Clairol, but with 84 more deep conditioning. The unique Soy 4 Plex color molecules, deeply penetrate the cortex of the hair and smooth outer layer to lock in the color. The conditioned outer layer then forms a highly reflective surface for a radiant, natural shine and look.