| 摘要 |
<p>Solvents useful to dissolve dyes employed in pressure-sensitive copying systems comprise aryl esters of benzoic or substituted benzoic acid having the structure: wherein R1 is hydrogen, methyl or ethyl; R2 is hydrogen or C1 to C9 alkyl; R3 is hydrogen, methyl or ethyl; and n is zero or 1.</p> |
