Abstract: The present disclosure relates to a composition comprising: (a) at least one polyacid; (b) at least one amino compound chosen from alkyl monoamines, alkoxylated polyamines, alkoxylated monoamines, polyamines and mixtures thereof; and (c) cosmetically acceptable carrier. The present disclosure also relates to a method of sealing the surface of a keratinous substrate using such compositions, including inhibiting loss of hair color. The compositions of the present disclosure may further comprise an auxiliary ingredient.

Abstract: The invention concerns a method for straightening keratinous fibers including: (i) a step of applying on the keratinous fibers a hair straightening composition containing at least one alpha-hydroxy and/or keto acid derivative, the pH of said composition being not more than 9 (ii) a step of increasing the temperature of the keratinous fibers, using heating means, to a temperature ranging between 110 and 250° C.

Abstract: The invention concerns a method for straightening keratinous fibers including: (i) a step of applying on the keratinous fibers a hair straightening composition containing at least one alpha-hydroxy and/or keto acid derivative, the pH of said composition being not more than 9 (ii) a step of increasing the temperature of the keratinous fibers, using heating means, to a temperature ranging between 110 and 250° C.

Abstract: The invention relates to the use in a composition for caring for human hair or eyelashes of an effective amount of a pyridinedicarboxylic acid derivative of general formula (I) or of one of its salts, in which R1 and R2 represent, independently of one another, OH, OR?, —NH2, —NHR? or —NR?R?, and R? and R? represent, independently of one another, a saturated or unsaturated and linear or branched C1-C18 alkyl radical or an aryl radical, this alkyl or aryl radical optionally being substituted by at least one OH, alkoxy, acyloxy, amino or alkylamino group, or R? and R? together represent a heterocycle, the composition being intended to induce and/or stimulate the growth of human keratinous fibers, such as the hair and eyelashes, and/or slow down their loss; the invention also relates to a cosmetic treatment intended to stimulate the growth of human keratinous fibers, such as the hair and eyelashes, and/or slow down their loss.

Abstract: Disclosed are cosmetic compositions comprising at least one latex-film former chosen from at least one random styrene acrylate copolymer and derivatives thereof, and at least one coalescent and/or plasticizer.

Abstract: Disclosed are cosmetic compositions comprising at least one latex-film former chosen from at least one acrylate copolymer and derivatives thereof, and at least one coalescent and/or plasticizer.

Abstract: The invention relates to a dyeing composition comprising a fluorescent disulphide dye and to a method of dyeing keratin materials, with a lightening effect, that employs said composition. It likewise relates to new fluorescent disulphide dyes and to their uses in the lightening of keratin materials. This composition allows a particularly persistent lightening effect to be obtained.