Question: how long do you leave jerome russell bleach on hair?
Answer: Highlighting. 20 to 90 minutes. Brush clean, dry hair away from the face and pull on highlighting hat from the front. Full Head - First time application. 20 to 90 minutes. On dry hair, starting at the front, work in the mixture evenly, front to back, then... Treating Roots (Re-Growth) 20 to 90 minutes.