Abstract: Provided is an ink composition that is obtained by using an ultraviolet-curable urethane acrylate resin together with a tungsten-based infrared-absorbing pigment and an ultraviolet-absorbing fluorescent pigment. Specifically, this infrared-absorbing ultraviolet-curable ink contains: a tungsten-based infrared-absorbing pigment; a UV-absorbing fluorescent pigment; a UV-curable urethane acrylate resin; and a UV-curable acrylic resin that does not contain a urethane bond.

Abstract: Provided are: an infrared ray-absorbing ultraviolet-ray curable ink which has infrared ray-absorbing ability and from which it is possible to provide printed matter having excellent resistance to bases, particularly resistance to washing; and an infrared ray-absorbing printed matter. According to the present invention, an ink composition is obtained by using an ultraviolet-ray curable urethane acrylate resin together with a tungsten-based infrared ray-absorbing pigment. More specifically, this infrared ray-absorbing ultraviolet-ray curable ink contains a tungsten-based infrared ray-absorbing pigment, an ultraviolet-ray curable urethane acrylate resin, and an ultraviolet-ray curable acrylic resin not including a urethane bond.

Abstract: The infrared-absorbing UV ink according to the present invention contains a tungsten-based infrared-absorbing pigment, a solvent, an acrylic resin that is soluble to the solvent, a UV-curable acrylic monomer, and a photocuring agent.

Abstract: A printed object includes a substrate and a first information code disposed on the substrate, wherein: the first information code is constituted of an infrared ray-absorptive ink layer that has been printed with an infrared ray absorptive ink; and the infrared ray absorptive ink layer is configured such that, when a laminated body constituted of a test substrate made of the same material as that of the substrate, and a test infrared absorptive ink layer made of the same material as that of the infrared ray absorptive ink layer and disposed on the test substrate is subjected to a relative spectral reflectivity measurement on the test infrared ray absorptive ink layer side, with the test substrate as the reference (100% reflectivity), the minimum relative reflectivity in the visible region is 50% or higher, and the minimum relative reflectivity in the infrared region is 75% or lower.

Abstract: Provided is an infrared-absorbing fiber, knit fabric, or non-woven fabric containing an infrared-absorbing pigment, wherein L* in the CIE 1976 color space is at least 30, and the color difference ?E in the CIE 1976 color space between said infrared-absorbing fiber, knit fabric, or non-woven fabric and an infrared-absorbing fiber, knit fabric, or non-woven fabric containing no infrared-absorbing pigment is at most 10.