What it is: Lightens like lightening! Lets you create lustrous highlights and special effects in no time at all. Works quickly, easily and beautifully! What it does: This formula contains moisture-sealing humectants, so every application starts with easy mixing and a creamy-smooth consistency that stays super-moist. What else you need to know: According to lift desired and condition of hair use your professional judgement in mixing 10, 20, and 30 volume of creme developer.