US 2003/0150067 A1 · Hair dyeing process

Abstract

Hair can be dyed by applying an oxidizing-agent-free, air-oxidative, one-pack hair dye composition to the hair without mixing the hair dye composition with an oxidizing agent and, after the hair is left over for 5 minutes to 1 hour, rinsing off the hair dye composition with water. The hair dye composition comprises: (a) a water soluble salt of a transition metal: 0.001 to 10 wt. % in terms of an anhydride based on the whole composition, (b) a chelating agent capable of coordinating on said transition metal: 0.001 to 10 wt. % based the whole composition, and (c) a color-developing substance: 0.001 to 10 wt. % based on the whole composition. According to the present invention, hair can be dyed by a convenient procedure without damage. The present invention is also excellent in dyeing properties and color variations.

Claims6

Dependent claims

A hair dyeing process comprising applying an oxidizing-agent-free, air-oxidative, one-pack hair dye composition, which comprises the following ingredients (a) to (c):

(a) a water soluble salt of a transition metal:
0.001 to 10 wt. % in terms of an anhydride form based on the whole composition,
(b) a chelating agent capable of coordinating on said transition metal:
0.001 to 10 wt. % based the whole composition, and
(c) a color-developing substance:
0.001 to 10 wt. % based on the whole composition,
to hair without mixing said hair dye composition with an oxidizing agent and, after said hair is left over for 5 minutes to 1 hour, rinsing off said hair dye composition with water.

4 more elements

Dependencies are inferred from the claim text.

Hair dyeing process

Life of this patent

Hair dyeing process

Life of this patent

Abstract

Claims6