Patent ID: 7744859

Claim:
A semi permanent hair shaping method comprising: (a) applying to the hair a first composition consisting, in a cosmetically acceptable medium, an anionic polymer, wherein the anionic polymer is 50/50 methacrylic acid/ethyl acrylate block copolymer, this application optionally being followed by a resting time for said first composition, wherein the anionic polymer is present in the first composition in an amount ranging from 0.1 to 50% by weight, relative to the total weight of the first composition, wherein the pH value of the first composition ranges from 6 to 10, (b) applying to the hair a second composition consisting, in a cosmetically acceptable medium, an acid wherein the acid is citric acid, such application optionally being followed by a resting time for said second composition, wherein step b) is conducted after step a), wherein the acid is present in the second composition in an amount ranging from 0.15 to 10% by weight, relative to the total weight of second composition, and wherein the pH value of the second composition ranges from 1.5 to 5, (c) rinsing the hair, and (d) shaping the hair either after applying the first composition of step a), or after applying the second composition of step b) and prior to the rinsing step c), wherein the semi permanent hair shaping method produces a hair shape permanent with respect to at least one shampoo, wherein the method does not comprise either opening the hair keratin disulfide bonds with a reducing composition or re-forming said disulfide bonds with an oxidizing composition.