abstract |
Disclosed is a heat-sensitive recording material comprising a support and a heat-sensitive coloring layer formed on the support, wherein n the heat-sensitive coloring layer contains either composite particles in which a leuco dye is contained in solid resin particles or microcapsules in which a leuco dye and a hydrophobic organic solvent are contained, n the heat-sensitive coloring layer optionally contains other leuco dye which forms a color different from the color formed by the leuco dye contained in the composite particles or in the microcapsules, and n the developer is N-p-toluenesulfonyl-N′-3-(p-toluenesulfonyloxy)phenylurea. |