Colorcharm Powder Lightener - BenefitsDo not process for more than 50 minutesMix in a non-metallic bowlWella Developer is required (10, 20, or 40 Volume) is sold separatelyUp to 7 levels of liftOn and off-the-scalp usageExcellent for full head lightening and regrowthControlled and reliable lightening action - Colorcharm Powder Lightener