Product Description The first developer with a cocktail of organic plant-based active ingredients Developer specific to the Biokera Natura Color range which acts as the source of active oxygen necessary to develop the color within the hair. Thanks to its composition it develops and sets the pigments inside the hair gently, taking care not to damage the skin or hair structure. Biokera Natura Color Developer is the first developer to contain a cocktail of organic active plant extracts which offer effective skin protection. HOW TO USE Mix in a non-metallic bowl in a ratio of one part color to one part Biokera developer .