HAIR COLOURING COMPOSITIONS AND THEIR USE

摘要

The present invention provides a hair colouring composition comprising (iv) at least one developer selected from amino aromatic systems capable of being oxidised and thereafter undergoing only a single electrophilic attack reaction, and (v) at least one developer selected from amino aromatic systems capable of being oxidised and thereafter undergoing at least two electrophilic attack reactions, and (vi) at least one coupler,which delivers improved root-to-tip evenness and improved hair colour.