Fill applicator bottle with 4 oz. of water (tepid, room temperature), then slowly add crystals. Shake to dissolve, forming a gel. Shampoo hair with Malibu C Un-Do-Goo Shampoo 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 to 45 minutes. Remove from heat, then shampoo and rinse thoroughly 3 times with Malibu C Un-Do-Goo Shampoo. Process can be repeated if desired. NOTE: Not intended for use on white or non-pigmented hair unless immediately followed with a color service. Due to relatively low pH, gloves are recommended.