Product Description The Hair Colour of Tomorrow Ammonia-free formula that respects and protects the hair. Zero is an ammonia-free dye formulated with the latest technology applied to permanent haircoloringthat offers the best results, while providing extra treatment and protection to the hair and scalp. The latest revolution in ammonia-free systems, combined with hair-protecting and strengthening active ingredients and a smart selection of vegetable oils for colour and shine never seen before. In addition, its exclusive alkalizing system prolongs the duration of the color and enhances its intensity with the utmost respect for the hair fiber. Discover ammonia-free colour; Free from parabens, resorcin, dimethicone, PPD, mineral oils, drying alcohols and unpleasantodors. How to use Permanent coloring: 1:1 Mixing ratio with Salerm Cosmetics Aloe Vera Cream Developer Demi-permanent coloration: 1:2 Mixing ratio with Salerm Cosmetics Aloe Vera Demi-Permanent Cream Activator