Oxidative hair dyeing process with catalytic pretreatment

Details Oxidative hair dyeing process with catalytic pretreatment Oxidative hair dyeing process with catalytic pretreatment

A - Human Necessities

61

K

A61K 7/13 (1990.01)

Patent

CA 2062293

In a method for oxidatively dyeing hair, a pretreatment which comprises contacting hair with an aqueous solution of an effective amount of particular metal/chelate complexes followed by treatment with oxidative dye mixtures is disclosed. The process serves to conform the oxidative dyeing rate of virgin hair to that of the normally noncongruent rate of nonvirgin hair, so as to enhance the efficiency of thw oxidative dyeing process, without reducing the intensity or variety of color available.

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