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

摘要

Provided are: an infrared absorbing fine particle dispersion powder which exhibits transparency in the visible light region, while having excellent infrared absorption characteristics and excellent chemical resistance; a dispersion liquid containing an infrared absorbing fine particle dispersion powder; an ink containing an infrared absorbing fine particle dispersion powder; an anti-counterfeit ink; and a printed matter for anti-counterfeiting. The present invention provides an infrared absorbing fine particle dispersion powder which has an average particle diameter of 1 μm or more, and which is configured of particles that are formed from a solid medium in which infrared absorbing fine particles are dispersed.