INFRARED ABSORPTIVE COMPOSITION, INFRARED ABSORPTIVE INK, RECORDED MATTER, METHOD FOR RECORDING IMAGE, AND METHOD FOR DETECTING IMAGE

摘要

PROBLEM TO BE SOLVED: To provide: an infrared absorptive composition excellent in dispersibility and dispersion stability of an infrared absorptive dye and excellent in light resistance; an infrared absorptive ink excellent in printability and enabling stable readout of image information for a long period of time; a recorded matter; a method for recording an image; and a method for detecting an image.;SOLUTION: The composition includes: (A) at least one infrared absorptive dye represented by following formula (1); and (B) at least one ion of a metal belonging to group 1 or 2 of the periodic table, wherein the content of the metal ion (B) is 30 ppm or more and 10,000 ppm or less (in formula (1), Ar¹, Ar², Ar³, Ar⁴, Ar⁵, Ar⁶, Ar⁷, and Ar⁸ each independently represents an aryl group).;COPYRIGHT: (C)2012,JPO&INPIT