Patent ID: 9508475
Filing Date: 2016-11-29
CPC Classification: C01P,C09C,C09D,H01F

Claim Text:
1. A multilayer pigment flake comprising: one or more layers of a ferromagnetic or ferrimagnetic alloy; one or more dielectric layers; and a central opaque reflecting layer of aluminum; wherein the one or more layers of ferromagnetic or ferromagnetic alloy include first and second semi-transparent layers; wherein the ferromagnetic or ferrimagnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy having a substantially nickel-free composition; wherein the one or more dielectric layers include first and second transparent dielectric layers; wherein the first transparent dielectric layer overlies the first semi-transparent magnetic layer; wherein the central opaque reflecting layer overlies the first transparent dielectric layer; wherein the second transparent dielectric layer overlies the central opaque reflecting layer; and wherein the second semi-transparent absorbing magnetic layer overlies the second transparent dielectric layer.