| 摘要 |
Pressure-sensitive and heat-sensitive record materials are described comprising a substrate, an acidic developer and chromogenic di-[bis-(indolyl) ethylenyl]tetrahalophthalides of the formula <IMAGE> wherein <IMAGE> and <IMAGE> wherein each X1, S2, X3, and X4 is independently selected from chlorine or bromine; wherein each of R1 and R7 is independently selected from cycloalkyl, aralkyl, alkoxyalkyl, or aroxyalkyl; wherein each of R2 and R8 is independently selected from alkyl (C1-C8) or aryl (substituted or unsubstituted); wherein each of R3, R4, R5, R6,R9, R10, R11, and R12 is independently selected from hydrogen alkyl (C1-C8), cycloalkyl, aryl (substituted or unsubstituted), halogen, alkoxy (C1-C8), aroxy, cycloalkoxy, dialkylamino including symmetrical and unsymmetrical alkyl (C1-C8), alkylcycloalkylamino, dicycloalkylamino, alkylarylamino, <IMAGE>
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