The Metal DX care from L'Oréal Professionnel Paris protects hair from the buildup of metal particles in the hair fiber, which can otherwise lead to an increased risk of hair breakage and distorted color results. Thanks to this treatment, hair is protected from further deposits after each coloring, bleaching, and balayage. As the formula penetrates deeply into the hair, hair breakage is reduced by 87%, and color results become more even, long-lasting, and shiny. With no waiting time, hair is instantly strengthened, and the hair surface is smoothed. Metal DX offers a pro guarantee for your coloring, balayage, and bleaching thanks to the 3-step application, which consists of a pre-treatment, shampoo, and care/mask.