Schwarzkopf Professional Blondme, Crystal Developer 9%, 30 Volumeume, 33 Ounce

You must use both the Crystal Bleach and Developer in order to achieve a transparent formula which makes the bleaching process directly visible for absolute convenience and control - For Supreme Blonde Hair Quality. What else you need to know: Crystal clear formula with a gel-like consistency. Aqua Hydrogen Peroxide Propylene Glycol Xanthan Gum Etidronic Acid Sodium Hydroxide 26-Dicarboxypyridine Disodium Pyrophosphate.