Process for the simultaneous dyeing and permanent shaping of hair
AssigneeWella Aktiengesellschaft
InventorsTheodor Wajaroff, Peter Hartmann, Kohei Kubo
Life of this patent
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Abstract
Process for the simultaneous dyeing and permanent shaping of white and gray hair, in which the hair is first treated with a shaping composition, then rinsed with water and treated with a fixing composition, characterized in that a shaping composition is used which comprises a content of at least one red-violet dyeing xanthene dyestuff and a fixing composition with a content of at least one blue dyeing anthraquinone dyestuff. The process, according to the invention, offers the advantage that the unwanted yellow shade in white and gray hair is permanently removed during the hair shaping treatment without an additional dyeing treatment.
Claims11
In a process for permanently shaping and dyeing white or gray hair, in which the hair is washed, towel-dried, wound on curlers, treated with a shaping composition, rinsed, treated with a fixing composition, rinsed, and the curlers removed, the improvement which comprises including in the shaping composition 0.00001 to 0.005% by weight of at least one red-violet dyeing xanthene dyestuff, and in the fixing composition 0.0001 to 0.01% by weight of at least one blue dyeing anthraquinone dyestuff, thereby eliminating any unwanted yellow shade of the hair.
A process for the permanent shaping and dyeing of gray or white hair whereby unwanted yellow shades of the hair are avoided which comprises the steps of:
- (a) washing the hair;
- (b) towel-drying the hair;
- (c) winding the hair on curlers;
- (d) shaping the hair by applying thereto an effective amount of an aqueous solution of a hair shaping composition which comprises a hair keratin reducing material and 0.0001% to 0.005% by weight of at least one red-violet dyeing xanthene dyestuff, and allowing the shaping composition to act for a period sufficient for the permanent shaping of the hair;
- (e) rinsing the shaping composition out of the hair with water;
- (f) fixing the hair shaped according to step (d) by applying thereto a fixing composition which comprises an effective amount of an oxidative fixing agent and 0.0001% to 0.01% by weight of at least one blue dyeing anthraquinone dyestuff;
- and
- (g) rinsing the fixing composition out of the hair treated according to step (f) with water, and removing the curlers.
Dependencies are inferred from the claim text.