Alkaline preparatory shampoo: Recommended before a coloration treatment. Cleanses the hair by favoring the opening the cuticle to facilitate the penetration and adhesion of pigments. Cleanses and removes greasy or silicone substances that act as a barrier on the hair, allowing the absorption of color and active ingredients. Instructions for use: Do not massage the scalp, but work by massaging only the lengths of the hair. Perform a gentle wash of the hair, leaving the shampoo on for 30 seconds before rinsing. Repeat the wash, leaving it on again for 30 seconds before rinsing thoroughly. Proceed with the desired technical service.