Patent ID: 7968494

Claim:
A heat-sensitive recording material comprising: a substrate; a heat-sensitive color developing layer over the substrate, the heat-sensitive color developing layer composed mainly of a leuco dye and a color developer that develops color of the leuco dye upon heating; and a protective layer over the heat-sensitive color developing layer, the protective layer composed mainly of a water-soluble resin and a crosslinking agent, wherein the protective layer contains diacetone-modified polyvinyl alcohol as the water-soluble resin, and N-aminopolyacrylamide as the crosslinking agent wherein the N-aminopolyacrylamide has a molecular weight of 10,000 to 100,000 and a hydrazidation ratio of 50% or more, and wherein the protective layer contains at least one of aluminum hydroxide and calcium carbonate as a basic filler.