| 摘要 |
<p>A thermally sensitive record material is disclosed which comprises chromogenic material which is a mixture of the isomers 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro¢3,4-b!pyridin-5-one and 5-(1-ethyl-2-methylindol-3-yl)-5-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro¢3,4-b!pyridin-7-one. This record material has superior color forming efficiency and greater image stability, especially resistance to fading in incident light.</p> |
