A method of reducing and/or preventing the bleaching and/or fading of artificially produced hair colors, includes the following steps: i. applying a cosmetic composition to the preferably wet, colored hair, ii. allowing the composition to act for a period of at least 5 s, iii. optionally: rinsing the composition out with water. The cosmetic composition, based on the weight thereof, includes a) 0.05 to 0.5 mol/kg of at least one divalent salt of a monobasic organic acid or b) 0.01 to 0.5 mol/kg of at least one monobasic organic acid (b1) and 0.05 to 0.5 mol/kg of at least one divalent inorganic salt (b2), and the cosmetic composition has a pH in the range from 4.0 to 4.8.

Disclosed are treatment compositions including a polycarbodiimide together with a carboxylic acid to enhance the quality of keratinous substrates, including keratinous fibers such as hair. In particular, compositions and methods for protecting hair from damage or adverse effects caused by extrinsic and intrinsic factors and for improving the condition of or repairing damaged hair are disclosed.

The present invention relates to a composition for treating keratin fibers, comprising at least an aqueous dispersion of hybrid hydrophobic film-forming acrylic polymer particles and at least one amino silicone and also to a process for treating keratin fibers using such a composition.

The present application relates to a cosmetic composition for pretreatment of hair, wherein the cosmetic composition contains at least one polyethylene glycol, at least one alcohol, and at least one alkalizing agent. The present application further relates to a cosmetic method for pretreatment of hair. In addition, the present application relates to the use of an alkaline aqueous or an alkaline aqueous-alcoholic solution comprising at least one polyethylene glycol for increasing the washing stability of human hair, and to the use of the cosmetic composition for increasing the washing stability of human hair.

Hair treatment agents containing at least one anionic surfactant, at least one amphoteric and/or nonionic surfactant, at least one cationic polysaccharide polymer, hexetidine, at least one organic acid and at least one lipid component reduce or prevent the washing-out of color from colored hair.

The invention relates to aqueous compositions for hair treatment, comprising polyorganosiloxanes A) or organic compounds B) having certain functional groups, in particular aldehyde and unsaturated dicarboxylic acid moieties, hair treatment or hair care compositions comprising the aqueous compositions, a process for the treatment of hair which comprises the steps of providing the aqueous compositions and applying said aqueous compositions to the hair, and the use of the aqueous compositions for the treatment of hair.

A method for the color retention of dyed keratin fibers is provided herein. The method includes i. applying a cosmetic composition to dyed keratin fibers as a pretreatment agent for keratin. The method further includes ii. subjecting the keratin fibers to a dyeing and/or brightening within a period of about 5 seconds to about 24 hours after to step i. The cosmetic composition has, based on its own weight, from about 0.01 to about 4.00% by weight of at least one alum and a pH value in the range of about 2.5 to about 5.

The present invention relates to a cosmetic treatment process for keratin fibers which have not been artificially colored, in particular human keratin fibers such as the hair, which consists in using one or more anionic oxidized polysaccharides and in raising the temperature of the keratin fibers.

A concentrate composition comprising: (a) at least 0.1 wt % of a surfactant compound; and (b) at least 10 wt % one or more ingredients selected from aldehydes, succinimidyl esters, chelating agents and amine salts of carboxylic acids.

A hair color retention system includes a primer composition having an effective amount of a dendrimer or hyperbranched compound in a cosmetically acceptable aqueous carrier and a chitosan complex composition including chitosan, dehydroxanthan gum, an aldehyde-bearing compound (ABC), and an organic acid. Upon application and rinsing of the primer composition, followed by application of the chitosan complex composition, a chitosan complex coating is formed on hair fibers that provides color retention to the hair. ?E of the treated hair is less than or equal to 10 after 40 washes with a clarifying shampoo.