Patent ID: 8388700

Claim:
A method of oxidative colouring hair wherein two compositions A and B are mixed prior to application onto hair, wherein composition A is an acidic composition having a pH between 2 and 5 and comprising at least one oxidizing agent and composition B is an alkaline composition having a pH between 8 and 12 and comprises one or more oxidative dye precursors, optionally one or more coupling agents and optionally one or more direct dye, and wherein composition A and/or B comprises additionally one or more fatty acid soap selected from sodium, potassium soaps and their mixtures, one or more surfactants selected from anionic, non-ionic, and amphoteric ones at a concentration between 1 and 30% by weight calculated to total of compositions A or B, is applied onto hair from a vessel delivering its content in the form of a foam, processed for 1 to 45 min at a temperature in the range of 20 to 45° C. and rinsed off from hair and hair is optionally shampooed and optionally dried.