Abstract: A hair treatment method including applying to a scalp a cosmetic composition comprising the following components (A), (B) and (C) and having a viscosity of from 1 to 30,000 mPa·s at pH 4.1: (A) a pH buffer; (B) an antioxidant; and (C) a pH-responsive thickener. The method further includes applying to the hair at least one hair treatment agent composition selected from the group consisting of a hair color composition, a hair bleach composition, a perm composition and a relaxer composition.

Abstract: A cleansing composition that simultaneously provides excellent washing performance and a good care feeling while securing good stability without being influenced by the use environment. The cleansing composition includes components (A) to (C): (A) an internal olefin sulfonate having 12 or more and 24 or less of carbon atoms: 1.8 mass % to 20 mass %; (B) a cationic surfactant represented by a specific formula: 0.1 mass % to 8 mass %; and (C) an aliphatic alcohol having 12 or more and 22 or less of carbon atoms: 1 mass % to 20 mass %, wherein a mass ratio of the content of the component (B) to component (A), (B)/(A), is 0.1 to 1, and a mass ratio of the content of the component (C) to the total of the components (A) and (B), (C)/{(A)+(B)}, is 0.1 to 4.5 or less.

Abstract: The present invention relates to a cleansing composition which can simultaneously provide excellent washing performance and a good care feeling while securing good stability without being influenced by the use environment which may variously vary. The cleansing composition includes the following components (A) to (C): (A) an internal olefin sulfonate having 12 or more and 24 or less of carbon atoms: 1.8 mass % or more and 20 mass % or less; (B) a cationic surfactant represented by a specific formula: 0.1 mass % or more and 8 mass % or less; and (C) an aliphatic alcohol having 12 or more and 22 or less of carbon atoms: 1 mass % or more and 20 mass % or less, wherein a mass ratio of the content of the component (B) to the content of the component (A), (B)/(A), is 0.1 or more and 1 or less, and a mass ratio of the content of the component (C) to the total content of the component (A) and the component (B), (C)/{(A)+(B)}, is 0.1 or more and 4.5 or less.