| 摘要 |
PURPOSE:To obtain thermo-sensitive recording material, the density of color formation thereof and the sensitivity of color formation thereof are sufficient and the fastness of the color former contained therein is enough, by adding a naphthoic acid derivative to a thermo-sensitive recording material containing an electron-donating leuco dye and an electron accepting compound. CONSTITUTION:An electron-donating leuco dye, such as a triarylmethane compound, a diphenylmethane compound, a xanthene compound, a thiazine compound, or a spiro-pyrane compound, an electron-accepting compound, such as a phenol compound, and a naphthoate ester of the formula (wherein R is an alkoxy group, an aralkyloxy group, an arylamino group, etc., and a naphthalene ring may have a substituent such as a halogen atom or an alkyl group) or naphthoamide are dispersed separately in water-soluble polymer solutions and mixed, and an inorganic pigment, such as kaoline, and other additives are added to prepare a coating liquid. The liquid is applied onto thick paper. |
