CATALYST are special oxidative liquids to use with a coloring system or with Natural Choice Colors bleaching powders. Available in 2 volumes. They develop pigmentation, regulate the bleaching and the covering of white hair for a long time. They rebalance the coloring formula's pH and protect scalp during the leave on time. CATALYST products are compact jellies that do not trickle.- Acid pH 2,5 for the pH rebalancing of the coloring product. - Catalyst 25 >. It facilitates the covering of resistant white hair and the balanced bleaching. - 2 bleaching levels.- Use on colored hair to blend tonalities.- Keratin aminoacids- Collagen.