Abstract: The present invention provides a hair treatment composition (I) comprising the following components (a) and (b), or a hair treatment composition (II) comprising the following components (c) and (b), and a method for imparting elasticity to the hair using the composition: (a) an organic solvent; (b) at least one aromatic sulfonic acid selected from naphthalenesulfonic acids, azulenesulfonic acids, tetralin-sulfonic acids, indansulfonic acids and benzophenonesulfonic acids or salts thereof; and (c) a reducing agent.

Abstract: The invention relates to a hair treatment composition comprising (a) a guanidium salt, (b) an alkalizing agent other than the guanidium salt and (c) a silicone. The use of the hair treatment composition permits brightening the color tone of the hair or dyeing the hair in good shades from a bright shade to a deep shade. The composition scarcely damages the hair, gives off little irritating odor and has low irritativeness to the scalp.

Abstract: A hair treatment composition which can imparts an excellent set-retaining power to the hair while maintaining the natural hair texture.The hair treatment composition contains a polymer capable of forming a polymer film having a water vapor transmission coefficient, which is determined on the basis of a water vapor transmission rate measured in accordance with "Testing Methods for Determination of Water Vapor Transmission Rate of Moisture-proof Packaging Materials" [Japanese Industrial Standard (JIS) Z0208-1976], at a temperature of 20.degree. C. under a relative humidity of 90%, of 0.8.times.10.sup.-3 g.multidot.m.sup.-1 .multidot.hr.sup.-1 or below.

Abstract: An intermediate treatment composition for permanent wave, comprising at least one carbonate and/or at least one hydrogencarbonate.When the hair is treated with the intermediate treatment composition for permanent wave between treatments with the first and second compositions, mixed disulfides formed in the hair by the treatment with the first composition can be cleaved. Therefore, the wave-forming rate can be enhanced, and damage to the hair can also be prevented.

Abstract: An organopolysiloxane which generates intramolecular or intermolecular cross-linking based on dipole-dipole interaction, hydrogen bonding or ion bonding, and which is not ruptured or plastically deformed at an extension ratio no more than 15% at a temperature of 20.degree. C. under relative humidity of 65%; and a method of setting hair using the same. Hair which is set by the method retains the given shape over time, and the organoplysiloxane imparts a soft touch to the hair. In addition, the shape given by the setting treatment can be easily restored to the original shape by ordinary shampooing.

Abstract: The present invention provides a hair cosmetic composition containing the following components (A), (B), (C), and (D):(A) an organic solvent,(B) a naphthalene sulfonic acid and/or a benzophenone sulfonic acid,(C) an anionic surfactant and/or an amphoteric surfactant, and(D) an oily agent.The hair cosmetic composition of the invention imparts satisfactory firmness/elasticity to hair in a short time, holds the firmness/elasticity for a long time, and provides the hair with excellent conditioning effects.

Abstract: A curly hair-straightening composition is disclosed, which comprises: (A) from 1 to 20% by weight of one or more keratin-reducing substances selected from the group consisting of thioglycolic acid, thioglycolic acid derivatives, cysteine, N-acylcysteines, salts thereof, thioglyceryl alkyl ethers, mercaptoalkylamides, sulfites and hydrogensulfites; (B) one or more alcohols selected from the group consisting of monohydric alcohols having a straight-chain or branched alkyl group carrying 3 or 4 carbon atoms and dihydric or trihydric alcohols having a straight-chain or branched alkyl group having 4 to 6 carbon atoms; and (C) water; wherein the weight ratio of the component (B) to the component (C) is from 1:3 to 3:1. Further, a method for straightening curly hair by using this composition is also disclosed. The curly hair-straightening composition of the present invention can permanently and sufficiently straighten natural curly hair or frizzy hair without causing any damage on the hair.

Abstract: A composition for treating keratinous fibers, which comprises:(A) A first agent containing a metal ion,(B) A second agent comprising:(B-1) An organic or inorganic compound which is capable of readily permeating into the keratinous fibers and can form water-insoluble or sparingly soluble complex together with said metal ion of component (A), and(B-2) An organic compound which cannot readily permeate into the keratinous fibers, and which reacts with said metal ion of component (A) to form a water-soluble complex, and method for treating keratinous fibers utilizing the composition.When the composition according to the present invention is used for treating keratinous fibers, it allows water-insoluble or sparingy soluble complex products to deposit inside the keratinous fibers while preventing water-insoluble or sparingly soluble complex products from depositing on the surface of the keratinous fibers.

Abstract: A two-pack hair treatment composition comprising a first lotion containing a reducing substance (a) and a cationic polymer (b) and a second lotion containing an anionic surfactant or amphoteric surfactant (c) and a lubricant (d), wherein the first lotion is applied to the hair first and then the second lotion is applied thereto.The process of the present invention for treating the hair with the above-described two-pack hair treatment composition comprises treating the hair with the first lotion, leaving the hair to stand for a predetermined period of time and, if necessary, subjecting it to intermediate rinsing, applying the second lotion to the hair, leaving the hair stand again for a predetermined period of time, and finally rinsing the hair.

Abstract: A hair treating composition comprising one or more thioglyceryl ethers provides effective wave formation, with a minimized mercapto smell and minimized irritation to the skin.

Abstract: A hair treatment composition Which comprises (A) 3 to 10% by weight, calculated as cysteine, of cysteine or its salt, (B) a saccharide or a polyhydric alcohol which has 4 to 20 carbon atoms, has 3 or more hydroxyl groups in the molecule, and which has no aldehyde group or ketone group, with the proportion by weight, (B)/(A) being less than 3.