Abstract: A method for shaping keratin fibres comprising: providing a crosslinking composition, wherein the crosslinking composition comprises: an active agent, wherein the active agent is selected from the group consisting of: oxoethanoic acid, 2,2-dihydroxyethanoic acid, 2,2?-oxybis(2-hydroxy)-ethanoic acid, a derivative thereof, and mixtures thereof; and wherein the active agent has a molecular weight of 500 g/mol or less; a photocatalyst; a cosmetically acceptable carrier; and applying the crosslinking composition to keratin fibres, mechanically shaping the keratin fibres with an appliance or implement, and exposing the composition to electromagnetic radiation having a wavelength of from about 300 nm to about 750 nm. Also a related composition, use, kit and process.

Abstract: Described herein is a chemical class of odorless thiols which can serve as reducing agents. This chemical class involves thiols which can be used as reducing agents for permanent styling treatments, depilatory compositions and other applications. The odorless thiols are thiols having a heterocyclic quaternary ammonium salt in their molecule.

Abstract: Described herein is a method for treating hair including: (a) putting the hair in a desired shape; (b) before and/or after the hair is put in the desired shape, applying a reducing composition to the hair including: (i) from about 2.5% to about 15% of a cationic mercapto amino pyridinium compound or a cationic dimercapto amino pyridinium compound; (ii) from about 4% to about 10% of a buffering system; and (iii) from about 50% to about 93.5% of a solvent; (c) rinsing the reducing composition from the hair; (d) applying an oxidizing composition to the hair including: (i) from about 0.5% to about 12% of an oxidizing agent; and (ii) from about 80% to about 97% of a solvent; and (e) rinsing the oxidizing composition from the hair. The reducing composition has a pH of from about 8 to about 10.

Abstract: A method to measure heat damage of keratin fibers comprising eluting a peptide from a hair sample with an aqueous solution; extracting the peptide using a suitable solvent sample; analyzing the peptide samples with MALDI-MS; resulting in peptide results; identifying presence of a marker peptide and identifying the m/z ratio for the peptide.

Abstract: A method to measure heat damage of keratin fibers comprising eluting a peptide from a hair sample with an aqueous solution; extracting the peptide using a suitable solvent sample; analyzing the peptide samples with MALDI-MS; resulting in peptide results; identifying presence of a marker peptide and identifying the m/z ratio for the peptide.

Abstract: A method for shaping keratin fibres comprising: providing a crosslinking composition, wherein the crosslinking composition comprises: an active agent, wherein the active agent is selected from the group consisting of: oxoethanoic acid, 2,2-dihydroxyethanoic acid, 2,2?-oxybis(2-hydroxy)-ethanoic acid, a derivative thereof, and mixtures thereof; and wherein the active agent has a molecular weight of 500 g/mol or less; a photocatalyst; a cosmetically acceptable carrier; and applying the crosslinking composition to keratin fibres, mechanically shaping the keratin fibres with an appliance or implement, and exposing the composition to electromagnetic radiation having a wavelength of from about 300 nm to about 750 nm. Also a related composition, use, kit and process.

Abstract: A hair straightening and/or hair relaxing method comprising: applying a hair care composition to hair, wherein the composition comprises a sugar, a buffering agent and a cosmetically acceptable carrier; and wherein, where the composition is heated to a temperature of at least 100° C., the composition comprises from about 6% to about 20% reducing sugar; hair drying; providing a hair straightening appliance at a temperature of from about 100° C. to about 280° C. and mechanically straightening the hair with the appliance.

Abstract: In one aspect, a method for achieving and semi-permanently retaining a hairstyle is provided. This method allows achieving a hairstyle and recovering it after shampooing hair. In another aspect, a kit comprising a film-forming composition and a coating composition is provided.