Preparation of a hair dye composition comprises mixing of at least two primary colour pigments to give a wide shade range

摘要

Preparing a composition for coloring hair comprises mixing at least two pigments to color hair, where each pigment comprises one of the three primary colors. An independent claim is device for preparing composition for coloring hair comprising containers for supplying metered doses of hair coloring pigment, where each pigment comprises one of the three primary colors, and a container for providing measured doses of a clearing agent of color.