Wella Professionals Color Touch, 1000 ml, Hair Dye Developers for Women, The Wella Professionals Color Touch activating emulsion is an essential tool for permanent and semi-permanent hair dyes. Characteristics: acts as an oxidising agent when dyeing hair for mixing with dye from the same product range the product is gentle on hair for perfect coverage on grey hair helps with even coverage How to use: Mix in the correct ratio with the hair dye. Use suitable protective gloves. Follow the instructions included. Avoid contact with eyes. If the product comes into contact with your eyes, rinse them immediately with plenty of water. Keep out of the reach of children.