Patent ID: 8828100
Filing Date: 2014-09-09
Classification: A61K,A61Q

Abstract:
1. A system for coloring keratin fibers, comprising: a. a first composition comprising at least one catechol-based color precursor or a pharmaceutically acceptable salt thereof and at least one pharmaceutically acceptable base is an organic base, a carbonate or bicarbonate; and b. a second composition comprising at least the pharmaceutically acceptable base; wherein at least one of the compositions further comprises at least one of a metal salt chosen from Fe(III), Fe(II), Co (II), Co(III), Ag(I), Ti(II), Cu(I), Cu(II), Cr(II), Cr(III), Mo(II), Mo(III), Ni(II), Ni(III), Mn(II) and Zn(II) wherein the catechol-based color precursor is of the formula: wherein R