| 摘要 |
PROBLEM TO BE SOLVED: To provide processes for forming pigments having metal cores, a passivation layer, and a uniform smooth layer of a high refractive index material, and multi-layered pigments formed by the processes.SOLUTION: A process of forming a multi-layered pigment comprises the steps of: providing a material metal core material; treating the metal core material with an acid; depositing a passivation layer onto the metal core material; densifying the metal core material having the passivation layer to reduce a pore size of the passivation layer; and depositing a high refractive index material onto the sintered material, where the high refractive index layer is uniform and crack-free. The passivation layer includes SiO, has a pore size distribution of 2.3 nm for 90% of the layer, and has a thickness of 100 nm. The high refractive index layer includes TiOand has a thickness of 50-200 nm.SELECTED DRAWING: None |
