Wash hair thoroughly using a clarifying shampoo. Do not use a conditioner. Massage toner through towel dried hair evenly from root to tip. Pile hair on top of head and cover with a plastic hood. Apply heat with a hair dryer for 5 minutes. Allow the toner to develop for maximum time of 30minutes or the time indicated on the strand test. Very dry hair could process in 10-15 minutes. Rinse thoroughly until water runs clear ensuring that the scalp and surrounding skin area is colour free.