| 摘要 |
The present invention relates to a pressure-sensitive or heat-sensitive recording material which contains as color former in its color-forming system at least one carbazolylmethane compound of the general formula <IMAGE> (1) wherein each of R1 and R2 independently represents hydrogen, alkyl of not more 12 carbon atoms which is unsubstituted or substituted or alkenyl of not more than 12 carbon atoms, acyl of 1 to 12 carbon atoms, phenyl, benzyl, substituted phenyl or substituted benzyl, Z represents alkyl of 1 to 12 carbon atoms, alkenyl of not more than 12 carbon atoms, aryl, aralkyl, or represents a heterocyclic radical, and each of the rings A, B, D and E independently can be substituted or unsubstituted. The carbazolylmethane compounds yield copies of improved color intensity and lightfastness.
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