Directions for use: use Welloxon only in combination with Wella hair colour, so that optimal colour development can be guaranteed. Wear suitable gloves. Mix the developer with the hair colour in a proper mixing ratio. Apply the mixture to dry hair. The exposure time without heat is 20 minutes (15 minutes for chemically treated hair), with heat supply then 15 minutes (10 minutes for chemically treated hair). If necessary, extend the exposure time by 5 minutes. Then rinse thoroughly. Application: professional hair dyes