1.Shampoo hair using a ph acid balanced shampoo, towel dry. 2.Empty desired amount into a plastic bowl (1/2 bottle for short hair / full bottle for long hair). Apply evenly with a tint brush. 3.Do not apply to scalp, but 1/2 inch from scalp. saturate hair thoroughly. comb evenly through the hair until it becomes frothy. 4.Leave on hair about 25 minutes. 5.Rinse hair thoroughly, wash away from the face. Works best on hair pre-lightened to a very light blonde. Fades gradually with each shampoo.