Method, compositions, and kits for coloring hair

Abstract

A method for altering the color of hair comprising applying a bleach composition containing persulfate salts and at least one oxidizing agent to the desired strands of hair for a period of time sufficient to bleach the hair, removing the bleach composition from the hair but leaving at least some residual oxidizing agent on the bleached hair strands, then treating the hair with a colorant composition containing at least one dye operable to color hair in the presence of the residual oxidizing agent found on the bleached hair strands, said colorant composition being free of any oxidizing agents operable to react with the dye present therein to form color, whereby upon contact with the colorant composition, the hair strands treated with the bleach composition having residual oxidizing agent thereon will react with the dye present in the colorant composition to cause the bleached hair strands to become colored, while any remaining unbleached hair will not become colored by contact with the colorant composition and a kit and shampoo composition for use with the method.

Description

TECHNICAL FIELD The invention is in the field of coloring hair, including applying highlights to hair. BACKGROUND OF THE INVENTION Highlights are very popular with consumers today. Highlights involve bleaching select strands of hair to achieve a color that is different (usually lighter) than the color of the base hair shade. This in turn provides unique effects such as a sun kissed look on an individual with dark blonde hair, or possibly lighter brown streaks on a black haired individual. In beauty salons, highlights are expensive. Generally the entire process takes from one to three hours. Typically strands of hair selected for highlighting are arranged on many small pieces of metal foil which are positioned throughout the hair based upon the judgment of the beautician. The strands on the foil are painted with the highlighting, or bleach, composition (a mixture of a persulfate composition and an oxidizing agent composition) for the appropriate period of time after which the foil...

AI Technical Summary

Benefits of technology

Another object of the invention is to provide a method for bleaching or

Problems solved by technology

In beauty salons, highlights are expensive.

The placement of the foil pieces is a very time consuming, labor intensive process that requires a certain judgment and skill, and when that is considered along with the time required for the actual bleaching operation, the entire process becomes quite lengthy and difficult.

In prestige beauty salons, highlighting procedures can cost several hundred dollars or more.

However, due to the level of skill involved in applying highlights, it is more difficult to obtain professional salon looking results when using at home kits.

There are several problems with the at-home kits.

Thus, the pattern tends to be very standard and not at all tailored to each individual consumer.

Further, the process of putting on a plastic cap that feels and looks much like a bathing cap, and then pulling hair strands through the holes in the cap with a crochet-hook like instrument is very labor intensive.

Combining the time required for that exercise with the time required for the bleach to act on the hair, results in a process that easily takes more than one to two hours.

These systems are messy, and the color application is often not uniform as there tends to be too much color at the hair roots and not enough at the ends.

There are many drawbacks to the current highlighting procedures whether conducted in the salon or at home.

The actual bleaching process, which involves bleaching melanin or color from the hair fiber, provides inconsistent results.

However, because the ingredients used in the bleach (oxidizing agent and persulfate salts) are very reactive with oxidative hair dyes, when such ingredients come into contact they immediately react and the reactants are consumed before anything productive can be done with the mixture.

This is obviously a very cumbersome and time consuming procedure that is not easily implemented in either the salon setting or in at home kits, and it could cause hair damage in those who have chemically over-processed hair.

Another significant problem, with standard bleaching or highlighting procedures is that they are not effective on hair that has already been color treated.

Thus, such procedures are not possible for the many consumers that have already colored their hair because it is very difficult to bleach hair that has been colored with oxidative dye.

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