Patent ID: 8088176

Claim:
A method of permanently coloring hair, comprising the steps of (a) providing a color base composition containing, (iii) at least one primary dye intermediate chosen from ortho-aminophenols, para-aminophenols, oho-phenylenediamines, para-phenylenediamines, double bases, heterocyclic bases, the acid addition salts thereof, and mixtures thereof; and (iv) at least 5% by weight of water, based on the total weight of the color base composition, wherein the color base composition has a pH ranging from 2 to 12; (b) applying the color base composition onto the hair; (c) rinsing the color base composition from the hair; (d) providing an anhydrous oxidizer composition containing at least one oxidizing agent chosen from persulfates, perborates, percarbonates, their salts, and mixtures thereof; (e) providing a shampoo composition containing a carrier vehicle and at least 4% by weight, based on the total weight of the shampoo composition, of at least one surfactant chosen from anionic, amphoteric, nonionic, zwitterionic, cationic surfactants, and mixtures thereof; (f) combining (d) and (e) immediately prior to use, to form a developer composition, wherein the developer composition contains from 1% to 80% by weight of the oxidizing agent, based on the total weight of the developer composition; (g) applying the developer composition onto the hair in order to develop color, in situ, to form colored hair; and (h) rinsing the developer composition from the hair.