| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dichromatic thermosensitive recording medium which provides clear red color development having almost no turbidness due to higher temperature color developing color tone in redcolor tone as lower temperature color developing color tone and, at the same time, stronger blackish color develoopment by the color development of black color tone as higher temperature color developing color tone to clear color tone having no turbidness due to other hue components and, further, develops few ground fogging even under the storage in high temerature environments. <P>SOLUTION: The dichromatic thermosensitive recording body comprises a dichromatic color developing layer on a support including composite particles containing an organic polymer and a black color developing dye precursor, solid dispersed fine particles consisting of a red color developing dye precursor, and a developer, wherein the composite particle contains 3-[2,2-bis(1-ethyl-2-methyl indole-3-yl)vinyl]-3-(4-diethylamino phenyl)phthalide. <P>COPYRIGHT: (C)2008,JPO&INPIT |
