Ammonia-Free Hair Coloring Cream For Highlights. Quickly colors previously decolored hair. Only 5 minutes to create contrasts, chromatic effects, streaks and highlights. Its ammonia-free formula ensures hair is protected during the treatment. The result is soft hair with the security of ultimate strength. Mix it with Dikson Mèches Developer by applying a 1:2 mixing ratio, or 1:1 to get deeper effects. Dermatologically tested. For professional use only.