Schwarzkopf Professional IGORA Royal activating emulsion acts as an oxidising agent or developer during the dyeing process. Its application in the right proportion with permanent colour ensures even coverage and helps to significantly intensify the tone and shine of the resulting hair colour. It therefore achieves bolder colours and, thanks to its influence on the consistency of the dye mixture, guarantees a more precise application. This professional product is for use in hair salons. For mixing with dye from the same product range, it provides coverage and lightening by several shades, resulting in a colour full of shine. Follow the instructions included. Only for professional use.