Fluorescent ink composition and fluorescent mark formed by the fluorescent ink composition

摘要

The present invention relates to a fluorescent ink composition and a fluorescent mark formed from the fluorescent ink composition, which is excellent in dispersion stability, light resistance, heat resistance, and water resistance due to no exudation, In order to obtain an infrared fluorescent mark suitable for increasing the density of a bar code, a good lid can be obtained even when a fluorescent mark having a high concentration and excellent in water resistance is obtained and an infrared fluorescent mark is provided on a subject having infrared absorption,C or higher and an organic fine particle having a particle diameter of 30 nm or more and exhibiting fluorescence in a visible light region, a type orphan mark, and organic fine particles having a glass transition temperature of 30C or higher and a particle diameter of 30 nm or more, Absorbs an infrared wavelength of 700 nm or more and emits light in the infrared region.;As a result, it is possible to obtain a fluorescent ink composition having excellent dispersion stability, light resistance, heat resistance and water resistance without occurrence of exudation, and a high-concentration fluorescent mark excellent in light resistance, heat resistance and water resistance without exudation formed by the fluorescent ink composition, Even when an infrared fluorescent mark is provided on a marked object having an infrared mark, it is possible to obtain a good reading and obtain an infrared fluorescent mark suitable for increasing the density of a bar code.