4% 13vol developer formulated for combination with Colour touch. ACTION: creamy texture, helps a proper color’s development and the surfactants allow an easy application and a quick rinse. The emulsion allows precise development of professional hair color. Contains advanced light 2 color complex that gives 63% more shine. Low-maintenance and quick changes: it only takes 20 minutes to process with up to 50% grey/ white hair coverage. Simple mixing 1:1 ratio. Mix in an exact ratio 1:2 with the Color Touch Colors by Wella.