Optical color change pigment
Optical color-changing pigments are a high-tech product that is currently on the market. Optically variable pigments consist of optically variable film fragments having specific spectral properties. The optical color-changing film is an optical film having a specific reflection spectrum characteristic designed according to the principle of optical interference by a multilayer film: it is composed of a plurality of materials having different refractive indexes, using high vacuum coating technology, according to specific film structure design requirements, The thickness and order of each film layer are precisely controlled and formed by sequentially depositing on the same carrier.
Optical color-changing inks formulated with optical color-changing pigments are today's most complex interference-type anti-counterfeiting inks. The printed product has a brilliant metallic luster, and the color blocks exhibit a pair of colors, such as red-green, green-blue, gold-silver, and the like. Looking under the white light or side view, as the perspective of the human eye changes, two different colors appear, the light-changing characteristics are strong, the color difference changes greatly, and the features are obvious. The color angle effect cannot be replicated with high definition scanners, color copiers, and other devices. The printed features cannot be emulated with any other ink or printing method. Suitable for screen, flexo, embossing, gravure and other print