| 摘要 |
PURPOSE:To chemically develop or discharge a color only by controlling thermal energy by providing a color developer/subtractor which is the salts of bis(hydroxyphenyl) acetic acid or bis(hydroxyphenyl) butyric acid and higher aliphatic amine. CONSTITUTION:A recording medium consists of a recording layer containing a leuco compound, a color developer/subtractor which develops or subtracts a color due to thermal reaction with the leuco compound and a binder as main components, provided on a support. The color developer/subtractor is the salts of bis(hydroxyphenyl) acetic acid or bis(hydroxyphenyl) acetic acid and higher aliphatic amine. More clearly, coating liquid for a recording layer is obtained by dissolving the binder in a coating liquid prepared by dispersing or dissolving dye in water or an organic solvent, and adding thickener or white pigment as liquid quality improver. This coating liquid is applied to a support such as paper, plastic film or sheet, and then is dried to form a recording layer. |
