Patent ID: 6719838
Filing Date: 2004-04-13
Classification: A61K,A61Q,B41M,C01P,C03C,C08K,C09C,C09D

Abstract:
A coloured interference pigment comprising platelet-shaped substrates having:(A) a coloured coating having a refractive index of n>1.8, (B) a colourless coating having a refractive index of n>1.8, (C) a colourless coating having a refractive index of n&lE;1.8, (D) a colourless coating having a refractive index of n>1.8, and optionally (E) an outer protective layer, wherein coating (A) is on top of said substrate, coating (B) is between coating (A) and coating (C), and, if layer (B) is present, coating (D) is between coating (C) and layer (E).