L'oreal

Societe Anonyme Dite: L'oreal

Christian Monnais

Jean-Francois Grollier

Lyonel Peritz

Jean Cotteret

Henri Samain

Laurence Caisey

Jean F Grollier

Andree Bugaut

Chantal S Fourcadier

Jean-Michel Sturla

Lyonnel Peritz

A process for improving the results of cosmetic treatments on bleached hair is provided.

Process for improving the results of cosmetic treatments performed on

The present invention provides a process for bleaching a lock or portion of lock of hair, at least partially, by irradiation of the lock using a laser beam in the form of pulses, and a device for implementation of same.

Process for bleaching hair by laser irradiation, and device

The invention relates to oxidation dyeing compositions comprising oxidation dyestuff precursors and N-substituted ortho-nitroanilines of the formula: ##STR1## in which R.sub.1 denotes an alkyl, monohydroxyalkyl or polyhydroxyalkyl group, R.sub.2 denotes hydrogen or an amino, monoalkylamino, dialkylamino, mono- or di-(monohydroxyalkyl or polyhydroxyalkyl)-amino, (N-alkyl-N-monohydroxyalkyl or N-alkyl-N-polyhydroxyalkyl)-amino, alkoxy, monohydroxyalkoxy, polyhydroxyalkoxy or aminoalkoxy group and R.sub.3 denotes hydrogen or an alkyl group, at least one of R.sub.2 and R.sub.3 being different from H, with the proviso that if R.sub.1 denotes --CH.sub.2 CH.sub.2 OH, R.sub.2 cannot be di-(monohydroxyalkyl)-amino in an alkaline medium which is non-ammoniacal and comprises an alkali metal or ammonium bisulphite and at least one alkanolamine which is N-(C.sub.1 to C.sub.4 -alkyl-ethanolamine, N,N-di(C.sub.1 to C.sub.4 -alkyl)-ethanolamine, di-(hydroxy-C.sub.2 to C.sub.3 -alkyl)-amine, 2-amino-2-methylpropan-1-ol, 2-dimethylamino-2-methylpropan-1-ol, 2-amino-2-ethylpropane-1,3-diol, 2-amino-2-methylpropane-1,3-diol or 2-amino-2-hydroxymethylpropane-1,3-diol.

Dyeing compositions based on oxidation dyestuff precursors and on

A process for preparing a hair dye or bleach composition which comprises mixing a gelifiable liquid vehicle with an oxidizing solution having dissolved therein an incompatible cationic polymer. The resulting gel is applied to the hair and after an appropriate contact time, the hair is rinsed.

Process for preparing a hair dye or hair bleach composition; a

A process for dyeing keratin fibres is disclosed which involved applying:

Tinctorial composition for keratin fibres, based on nitrated benzene

Dyeing compositions are disclosed which comprise at least one oxidation dyestuff precursor in combination with at least one direct dyestuff, in an aqueous vehicle, the direct dyestuff being a nitro derivative of the benzene series having the formula: ##STR1## in which R.sub.1 denotes the methyl group, R.sub.2 and R.sub.4 denote hydrogen and R.sub.3 denotes the .beta.-hydroxyethoxy group, or alternatively R.sub.1, R.sub.3 and R.sub.4 denote hydrogen and R.sub.2 denotes the methyl or hydroxyl group, or alternatively R.sub.1 and R.sub.2 denote hydrogen, R.sub.3 denotes the methyl group and R.sub.4 denotes the hydroxyl, (.beta.-hydroxyethyl)-amino or (.beta.-N,N-diethylaminoethyl)-amino group, or R.sub.1, R.sub.2 and R.sub.3 denote hydrogen and R.sub.4 denotes the N,N-bis-(.beta.-hydroxyethyl)-amino group.

Dyeing compositions based on oxidation dyestuff precursors and on nitro

A process for dyeing hair comprises in sequence applying to the hair an oxidation hair dye composition comprising a mixture of an oxidation dye, a cationic polymer and an oxidizing agent in an oxidation dye carrier, permitting said oxidation hair dye composition to remain in contact therewith for a time ranging from about 15-40 minutes, rinsing the hair with water, then applying to the rinsed hair a shampoo composition containing an anionic detergent and thereafter rinsing said hair with water.

Cosmetic composition for dyeing hair and process for using the same

Creams and gelatinizable liquid which contain oxidation dyes and a vehicle, useful for dyeing hair, are disclosed. The vehicle includes at least one fatty acid, at least one alkalizing agent and at least one cationic polymer containing repeating units of the formula: ##STR1##

Compositions for dyeing hair and their applications

Hair dye composition containing a hair dye formulation packaged in two

A cosmetic composition which at ambient temperature comprises a solution in a water or hydroalcoholic solvent of at least one cosmetic component which in said solution at ambient temperature is not stable, can be preserved, stabilized and packaged by freezing said composition and storing it at a temperature below its freezing point.

Solid, frozen stabilized hair dye

A dye composition for keratinic fiber and particularly living human hair comprises an admixture of one or more diphenylamines whose corresponding indoamine has an oxidation-reduction potential between -450 and -350 mv and a polyhydroxybenzene having an oxidation-reduction potential between -600 and -300 mv and having the formula ##STR1## wherein R.sub.1 represents hydroxy or ##STR2## wherein R.sub.3 represents hydrogen or alkyl, and R.sub.2 represents hydrogen, or NH.sub.2 when R.sub.1 represents NH.sub.2, said diphenylamine and polyhydroxybenzene being present in an amount such that the ratio of the total number of moles of diphenylamine to the number of moles of polyhydroxybenzene is between 2 and 7.

Growing community of inventors

Neuilly-sur-Seine, France

Christian Monnais