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Process for bleaching keratin fibers
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A technology of keratin fibers and fibers, which is applied in the field of bleaching keratin fibers, can solve the problems of residual melanin, unbearable, unacceptable, etc.
Inactive Publication Date: 2008-09-03
PROCTER & GAMBLE CO
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Problems solved by technology
[0013] Typically, type-1 bleaches allow only relatively small changes in hair color due to undamaged melanin remaining
Also, common hair dyes cannot withstand the Type-2 bleaching method
Additionally, Type-2 bleaches show extensive fiber damage and often exhibit an undesirable orange tinge
Method used
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[0065] 4.875 g of component A was mixed with 4.875 g of component B and 0.25 g of component C before use. The ready-to-use formulation was applied to medium brown natural tresse...
Embodiment 2
[0066] Example 2: Agents for Lightening and Toning Hair Simultaneously
[0088] 4.85 g of component A was mixed with 4.85 g of component B and 0.3 g of component C before use. The ready-to-use formulation was ap...
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Abstract
The present patent application relates to a process for bleaching keratin fibers which is characterized by applying to the fiber a ready-to-use agent having a basic pH and containing a) at least one bleach booster according to the general formula (I) wherein R1 is a hydrogen, R2 is hydrogen, a substituted or unsubstituted C1- to C12-alkyl group, a substituted or unsubstituted C1- to C12-monohydroxy-alkyl group, a substituted or unsubstituted C2- to C12-polyhydroxy alkyl group, or a substituted saturated, unsaturated or aromatic 4- to 8-membered carbocycle or heterocycle, and R3 is a OR-Group, with R being equal to hydrogen, an ammonium group or an alkali metal or an earth alkali metal atom; and b) at least one appropriate type-2 bleach-stable direct dye and c) at least one oxidant; and after an exposure time of 5 to 60 minutes at a temperature of 10 to 70 DEG C rinsing the fiber with water; as well as the use of special type-2 bleach-stable direct dyes for acquiring a natural looking bleaching of keratin fibers, particularly human hair, without undesired undertones.
Description
field of invention [0001] The present invention relates to a method for bleaching keratin fibers by using a bleaching agent comprising a specific bleach booster and a direct dye stable to type-2 bleaching to give the fiber a pleasing and natural appearance. Background of the invention [0002] Natural hair color is obtained from the melanin particles contained throughout the cortex of the hair fiber. Two general classes of the above pigments have been identified: eumelanins (brown-black) and pheomelanins (red-orange). The combined ratios and concentrations of these two types of pigments give the hair its characteristic natural shade of color. Black hair has a higher concentration of eumelanin, while red hair contains prominent pheomelanin. Light blonde hair contains reduced amounts of both pigments. [0003] Human hair is artificially divided into ten grades that describe its level of darkness (or lightness). Black hair is assigned a grade 1, medium brown hair a grade 5,...
Claims
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Application Information
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