A kind of pigment chip and paint

Abstract

The present application relates to the technical field of optical discoloration, and specifically discloses a pigment flake and a paint. The pigment flake includes: a reflective layer having a first surface and a second surface opposite to each other; The first functional layer, wherein the first functional layer at least includes a first dielectric layer, a second dielectric layer and a first absorption layer which are sequentially stacked on the first surface; Two functional layers, wherein the second functional layer at least includes a third dielectric layer, a fourth dielectric layer and a second absorption layer which are sequentially stacked on the second surface; wherein the refractive index of the first dielectric layer is greater than that of the second dielectric layer The refractive index of the third medium layer is greater than the refractive index of the fourth medium layer. Through the above method, the present application can manufacture pigment flakes with low cost, easy mass production and good optical performance.

Description

technical field [0001] The present application relates to the technical field of optical discoloration, in particular to a pigment flake and a paint. Background technique [0002] Optical color-changing materials have a color change phenomenon related to the viewing angle. Observers can observe different colors at different angles, especially when observing at an angle of 0 degrees or 60 degrees to the normal direction of the surface of the optical color-changing film. Optically variable films will exhibit distinctly different colors, a phenomenon known as flop. For example, according to a specific optical design, color changes such as green to red, red to green, and green to blue can be obtained. And this color change phenomenon cannot be reproduced by common forgery methods such as color reproduction equipment, electronic color separation plate making and rubbing. Therefore, the optical color-changing material can be used as an effective anti-counterfeiting means for cur...

AI Technical Summary

Problems solved by technology

[0003] In the long-term research and development process, the inventors of the present application found that with the development of the pigment flake market, the demand for pigment flakes with metallic luster and small angle dependence is gradually increasing, while the medium layer of the pigment flakes in the prior art is usually High refractive index, resulting in insufficient monochromaticity of the reflectance spectrum, reflected in the reflectance spectrum as a wider half width at half maximum (FWHM)

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