| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To improve the absorption efficiency of infrared laser light, reduce the degree of coloring of the background, and enable high-quality recording. SOLUTION: The infrared laser comprises a support and a heat-sensitive layer containing at least an organic silver salt, a developer of the organic silver salt, a tricarbocyanine dye having at least two acidic groups, and a water-soluble binder. A thermal recording material, The tricarbocyanine dye has a wavelength of 50 nm or more longer than the absorption maximum wavelength of the dye aqueous solution, and 650 to 13 It is contained in the heat-sensitive layer in a state of having an absorption maximum wavelength in the range of 00 nm. At least one of the organic silver salt and the organic silver salt developer is preferably microencapsulated. |