Patent ID: 7044986

Claim:
A method of dyeing the hair, comprising: mixing a first pack formulation and a second pack formulation, said first pack formulation comprising the following ingredients (A) to (D): (A) ammonia or an ammonium salt 0.01 to 3 mol/kg, (B) a carbonate with a proviso 0.001 to 1 mol/kg, that said carbonate is other than an ammonium salt (C) a transition metal salt 0.1 to 10,000 ppm, (D) a chelating agent wherein the molar ratio of (A) to (B) ranges from 0.1 to 5, and the first pack formulation has a pH ranging from 8.5 to 12; and said second pack comprising an acidic hydrogen peroxide solution as an oxidizing agent; applying the mixed first and second pack formulations to the hair; permitting the applied mixed formulation to dye the hair; and then removing the applied mixed formulation from the hair.