US 6,309,426 B1Granted

Hair coloring compositions

AssigneeThe Procter & Gamble Company

InventorsLouis Carlos Dias, James Charles Dunbar, Dominic Pratt

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Abstract

A hair coloring composition present in a single package suitable for direct application to the hair wherein the hair coloring mixture comprises: a) an oxidising agent; and b) an oxidative hair coloring agent; and wherein the combined mixture of a) and b) has a pH in the range of from about 1 to about 5 and wherein the resultant color delivered to the hair (Delta E), after at least about 1 month of storage at room temperature, is up to about 75%, preferably up to about 85%, more preferably up to about 90% and most preferably up to about 95% of the total color delivered to the hair (Delta E) from a mixture of a) and b) on application. The products are storage stable, re-usable and can provide both excellent hair coloring and in-use efficacy benefits as well as improved color development potential after storage at room temperature.

Claims21

Dependent claims

A hair coloring composition suitable for direct application to hair and comprising a singly packaged mixture of:

(a) an inorganic peroxygen oxidising agent;
and
(b) an oxidative hair coloring agent comprising an aromatic diamine, polyhydric phenol or amino phenol;
wherein the mixture of (a) and (b) has a pH in the range of from about 1 to about 5 and wherein the hair coloring composition is adapted to provide, after storage of the composition for one month, a change in hair color, Delta E Stored, upon application of the composition to the hair, wherein Delta E Stored is at least about 75% of a Delta E Target, wherein Delta E Target is a change in hair color provided by application of a mixture of (a) and (b) immediately after mixing (a) and (b), wherein each Delta E is determined by a Hunter Colorquest spectrophotometer and Delta E=(ΔL2+Δa2+Δb2)/2, and wherein L is a measurement of the color intensity, a is a measure of the red and green quotients, and b is a measure of the yellow and blue quotients.

1 more element

Dependencies are inferred from the claim text.