Patent ID: 9345658
Filing Date: 2016-05-24
CPC Classification: A45D,A61K,A61Q

Claim Text:
1. A method for colouring hair comprising the steps of: i) mixing a first dye composition with a first developer composition to obtain a first hair colouring composition, wherein the first dye composition comprises one or more oxidative dye precursors and one or more alkalizing agents and the first developer composition comprises one or more oxidizing agents; ii) applying a portion or all of the first hair colouring composition to the hair roots and to one or more portions of the hair lengths and tips extending from the hair roots; iii) mixing a second dye composition with a second developer composition to obtain a second hair colouring composition, wherein the second dye composition comprises one or more oxidative dye precursors and one or more alkalizing agents and the second developer composition comprises one or more oxidizing agents, wherein the individual concentrations of the oxidative dye precursors, the alkalizing agents, and the oxidizing agents comprised in the second hair colouring composition are lower than the individual concentrations of the oxidative dye precursors, the alkalizing agents, and the oxidizing agents comprised in the first hair colouring composition; iv) applying a portion or all of the second hair colouring composition to the hair.