Use of n-substituted-5,6-dihydroxyindoles as a hair coloring...

Details Use of n-substituted-5,6-dihydroxyindoles as a hair coloring... Use of n-substituted-5,6-dihydroxyindoles as a hair coloring...

A - Human Necessities

61

K

167/302

A61K 8/49 (2006.01) A61Q 5/10 (2006.01)

Patent

CA 1324320

ABSTRACT OF THE DISCLOSURE The use of N-substituted-5,6-dihydroxyindoles in solution as a hair dyeing agent in combination with the pre-treatment of the hair to be dyed with a solution comprising the water soluble salt of various metals is also provided. This yields hair colors from light golden to light reddish brown to dark auburn to black.

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