Use of natural dyes for coloring human hair
AssigneeL'oreal
InventorMaxime De Boni
Life of this patent
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Abstract
The present invention relates to a hair coloring composition containing at least one natural dye, in particular at least one orcein, and at least one particular organic solvent. The invention also relates to a hair coloring method that comprises applying on the fibers a composition containing one or more natural dyes for a duration sufficiently long for obtaining the desired color. The invention thus provides colorings that respect the nature of the hair while offering strong, low-selectivity and resistant nuances.
Claims18
A dyeing composition comprising at least one natural dye chosen from orceins, alizarin, purpurin, carminic acid, kermesic acid, purpuroqallin, protocatechaldehyde, indigo, curcumin, spinulosin, apiqenidin, chlorophyllin, sorghum, and cochineal carmine and at least one organic solvent having a value of the Hansen solubility parameter δH less than or equal to 15 MPa1/2 chosen from alcohols, ethers and esters.
A kit comprising a first anhydrous composition comprising at least one natural dye chosen from orceins, alizarin, purpurin, carminic acid, kermesic acid, purpurogallin, protocatechaldehyde, indigo, curcumin, spinulosin, apigenidin, chlorophyllin, sorghum, and cochineal carmine and a second aqueous composition, wherein at least one of the first and second compositions comprises at least one organic solvent chosen from alcohols, ethers, and esters having a value of the Hansen solubility parameter δH less than or equal to 15 MPa1/2.
A method of dyeing human hair comprising:
- applying to the hair, without pretreatment, a composition comprising at least one natural dye chosen from orceins, alizarin, purpurin, carminic acid, kermesic acid, purpurogallin, protocatechaldehyde, indigo, curcumin, spinulosin, apigenidin, chlorophyllin, sorghum, and cochineal carmine, and at least one organic solvent having a value of the Hansen solubility parameter δH less than or equal to 15 MPa1/2 chosen from alcohols, ethers, and esters, for a sufficient time to obtain the desired coloring;
- and optionally rinsing the hair.
Dependencies are inferred from the claim text.