| 主权项 |
1. A metallic luster pigment based on coated aluminum substrate platelets,
wherein the aluminum substrate platelets have a thickness of 1 to 50 nm, preferably of 1 to 30 nm, are of monolithic structure and have optionally been passivated and are encased by at least one coating B composed of at least one metal oxide having a high refractive index of at least 1.9, wherein the coating B has a thickness of at least 50 nm, and wherein between the surface of the aluminum substrate platelets and the coating B there is at least one further coating A which encases the substrate platelets and is composed of at least one metal oxide having a low refractive index of at most 1.8, selected from the group consisting of SiO2, B2O3, MnO2, MgO, GeO2 and Al2O3. |
