Anti-counterfeit ink composition, anti-counterfeit ink, and anti-counterfeit printed product

An anti-counterfeit ink composition comprising:

• organic-inorganic hybrid infrared absorbing particles;
• and
• a surfactant,
• wherein the organic-inorganic hybrid infrared absorbing particles include infrared absorbing particles and a coating resin,
• the organic-inorganic hybrid infrared absorbing particles are obtained by polymerizing a mini-emulsion containing a raw material of the coating resin and the infrared absorbing particles;
• whereby each of the organic-inorganic hybrid infrared absorbing particles forms a spherical structure having a size of 50 nm or more and 500 nm or less, in which the infrared absorbing particles are encapsulated,
• the coating resin includes one or more resins selected from polyester resin, polycarbonate resin, acrylic resin, polystyrene resin, polyamide resin, vinyl chloride resin, olefin resin, fluorine resin, polyvinyl acetate resin, polyurethane resin, acrylonitrile butadiene styrene resin, polyvinyl acetal resin, acrylonitrile-styrene copolymer resin, ethylene-vinyl acetate copolymer resin, phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester resin, alkyd resin, and polyimide resin, and
• the surfactant is an aqueous solution in which dodecyltrimethylammonium chloride is present in water at a concentration of 1 to 10 times the critical micelle concentration.