Abstract: The present invention relates to a process for permanent shaping and dyeing carried out one after another with compositions providing improved and milder shaping and dyeing of hair, especially human hair. The inventors of the present invention have unexpectedly found out that when commonly used permanent shaping and dyeing compositions are mixed with another composition comprising predominantly carboxylic acids, the permanent shaping and dyeing effects of the compositions are improved, homogeneous permanent shaping and dyeing of hair fibers is achieved and natural cosmetic properties of hair are maintained.

Abstract: The present invention relates to a hair treatment process for improved and milder oxidative treatment of hair, especially human hair. It was found out that when commonly used oxidative treatment compositions are mixed with another composition comprising predominantly carboxylic acids, the dyeing and/or bleaching effects of the compositions are improved, homogeneous dyeing/bleaching of hair fibers is achieved and natural cosmetic properties of hair is maintained.

Abstract: The present invention relates to a process for semi-permanent straightening and dyeing hair for improved and milder semi-permanent straightening and dyeing of hair, especially human hair. The inventors have unexpectedly found that when commonly used oxidative dyeing compositions are mixed with another composition comprising predominantly carboxylic acids, the dyeing effect of the composition is improved, homogeneous dyeing of hair fibers is achieved and natural cosmetic properties of hair is maintained. The hair may be semi-permanently straightened before or after oxidative dyeing the hair.

Abstract: The present invention relates to a process for treating hair, especially human hair, wherein the hair is bleached and dyed in a subsequent order with compositions providing improved and milder bleaching and dyeing of hair. The inventors of the present invention have unexpectedly found out that when commonly used bleaching compositions and oxidative dyeing compositions are mixed with another composition comprising predominantly carboxylic acids, the bleaching and dyeing effects of the compositions are improved, homogeneous bleaching and dyeing of hair fibers is achieved and natural cosmetic properties of hair is maintained.

Abstract: The present invention provides a hair cosmetic composition containing the following components (a) and (b) and a hair treatment method in which the hair cosmetic composition is applied to the hair: (a) one or two or more peptides each having the number of amino acid residues being 5 to 50, and having neither a sulfur-containing amino acid residue nor a derivative thereof; and (b) a hair-swelling organic solvent.

Abstract: A hair cosmetic composition containing the following components (a) and (b) and a hair treatment method in which the hair cosmetic composition is applied to the hair: (a) one or two or more peptides each having the number of amino acid residues being 5 to 50, and having neither a sulfur-containing amino acid residue nor a derivative thereof; and (b) a hair-swelling organic solvent.