The Healty Color Ammonia-Free Colouring Cream is perfect for the most sensitive scalps as it does not irritate or itch. Contains no PPD (p-Phenylenediamine) pigment that causes allergic reactions in people who are sensitive to the compound. Enjoy an intense and long-lasting colour with hydrated and nourished hair. Combine with Activator at a 1:1.5 ratio and leave to act for 30-35 minutes. To enhance the final result, use an acid shampoo after colouring.