| 摘要 |
A thermal recording material which is excellent in background whiteness and thermal responsiveness and can be inhibited from suffering background coloring during high-temperature storage. The thermal recording material comprises a support and formed thereon a heat-sensitive color-developing layer containing a leuco dye which is colorless or light-colored at ordinary temperature, an organic acid substance which upon heating reacts with the leuco dye to cause the dye to develop a color, and a sensitizer, wherein the organic acid substance comprises 1,1'-methylenedi-2-naphthol, represented by the formula (I), and the sensitizer comprises at least one member selected among m-terphenyl, 4-benzylbiphenyl, 4-acetylbiphenyl, 2-benzyloxynaphthalene, oxalic diester derivatives, terephthalic diester derivatives, diaryloxyethane derivatives, and acetoacetanilide derivatives. |
