| 摘要 |
<p>This invention discloses heat sensitive recording sheets comprising a developer and a coupler, in which the developer comprises at least one of the compounds represented by the general formula <CHEM> where each R independently represents hydrogen, an alkyl radical of from 1 to 12 carbon atoms, a cycloalkyl radical of from 3 to 10 carbon atoms, an aralkyl radical of from 7 to 10 carbon atoms, or a phenyl radical, and n is zero, 1 or 2.</p> |
