Infrared absorbing fine particle dispersion powder, dispersion liquid containing infrared absorbing fine particle dispersion powder, ink containing infrared absorbing fine particle dispersion powder, and anti-counterfeit ink, and anti-counterfeit printed matter

摘要

There are provided infrared absorbing fine particle dispersed powder, dispersion liquid containing infrared absorbing fine particle dispersed powder, ink containing infrared absorbing fine particle dispersed powder, and anti-counterfeit ink and anti-counterfeit printed matter, which are transparent in a visible light region, have excellent infrared absorption properties, and are also excellent in chemical resistance, and is provided infrared absorbing fine particle dispersed powder containing particles made of solid media and having an average particle size of 1 µm or more and having infrared absorbing fine particles dispersed inside.