| 摘要 |
A substantially light-insensitive black and white monosheet thermographic recording material is provided comprising a support and a thermosensitive element containing a substantially light-insensitive organic silver salt, a 1,2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, characterized in that the 1,2-dihydroxyphenyl-compound is represented by formula (I): <CHEM> where R is -P(=O)R<1>R<2>, -SOxR<3>, -CN , -NO2 or -CR<4>=NR<5> when n is 0; R is -P(=O)R<1>R<2>, -SOxR<3>, -CN, -NO2, -CR<4>=NR<5> or -COR<6> when n is an integer; R<1> and R<2> are independently an alkyl, a substituted alkyl, an aryl, a substituted aryl group, an alkoxy, a substituted alkoxy, an aryloxy, a substituted aryloxy, a hydroxy group, an amino group or a substituted amino group; R<3> is an alkyl, a substituted alkyl, an aryl, a substituted aryl, an amino or a substituted amino group; R<4> is an alkyl, a substituted alkyl, an aryl or a substituted aryl group or hydrogen; R<5> is an alkyl, a substituted alkyl, an aryl, a substituted aryl, a hydroxy, an alkoxy, an aryloxy, an acyl, an amino or a substituted amino group; R<6> is an alkyl, a substituted alkyl, an aryl, a substituted aryl, an alkoxy, a substituted alkoxy, an aryloxy, a substituted aryloxy, a hydroxy, an amino or a substituted amino group or hydrogen; x is 1, 2 or 3; and the benzene ring of the 1,2-dihydroxyphenyl-compound represented by the formula (I) may be further substituted.
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