Light Scale Care Anti-Yellow MousseAnti Yellow Mousse, a conditioning mousse enriched with special purple pigment. Fights against undesirable brassy tones, creating freshness and lightness, and adding hydration especially for fine hair. How to use: Use disposable gloves, apply to washed and towel dried hair. Apply to the roots, lengths and ends, leave on up to 5 minutes depending on the desired level of neutralization then rinse out with plenty of warm water. Product to be rinsed out.