Fill applicator bottle with 4 oz. of water (tepid, room temperature), then slowly add crystals. Shake to dissolve, forming a gel. Shampoo hair and rinse. Work gel into hair using maximum pressure of palms and fingertips to ensure saturation. Apply a professional processing cap and expose to heat for 15 minutes. Remove from heat, then shampoo and rinse thoroughly 3 times (Malibu C Un Do Goo Shampoo recommended). NOTE: Due to relatively low pH, gloves are recommended.