challenge | Alternative Approaches for Hair Coloration

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owner:
Procter and Gamble

Alternative Approaches for Hair Coloration

Details

P&G is looking for innovative methods, materials or processes with which to eliminate these disadvantages and reinvent the coloring process. The aim of the innovation is to transform the act of dying hair from a chemical/technical process into an enjoyable, spa-like experience. We would consider a wide range of solutions: from a different alkalizing medium (instead of ammonia) to the introduction of an additional, preliminary step that prepares the hair for the new coloring method or a combination of dye and a carrier medium that is then applied to the hair. We also consider a completely different approach.

Background

In general, there are two different ways of coloring hair:

1) Oxidative hair coloring:

Ammonium hydroxide is used to ‘open’ the hair cuticles, after which a mixture of dyes and peroxides is applied. The peroxide oxidative dissolves the melanin in the hair; the individual color components penetrate the hair and oxidative form the required hair color in the presence of other peroxide groups to give 100% gray coverage.

2.) Hair Toner:

So-called direct hair dyes (color molecules) are applied to the hair via a shampoo or a conditioner. After rinsing, there are enough color molecules left in the hair to give it a different color. The disadvantage of this method is that the tint is completely gone after 5 to 10 washes. Tints achieve a maximum of 30% gray coverage.