Thermographic recording material with improved image tone

   
   

A monosheet black and white substantially light-insensitive thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing a substantially light-insensitive organic silver salt, a 1,2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, wherein said 1,2-dihydroxyphenyl-compound is represented by formula (I): R.sup.1 SO.sub.2 R.sup.2, wherein R.sup.1 is an optionally substituted aryl group and R.sup.2 is selected from the group consisting of a 3,4,5-trihydroxyphenyl group, a 3-alkoxy-4,5-dihydroxyphenyl group and a 3-aryloxy-4,5-dihydroxyphenyl group; or said 1,2-dihydroxyphenyl-compound is represented by formula (II): R.sup.3 COOR.sup.4, wherein R.sup.3 is a 3-alkoxy-4,5-dihydroxyphenyl group or a 3-aryloxy-4,5-dihydroxyphenyl group; and R.sup.4 is an alkyl group or an aryl group; and a thermographic recording process therefor.

Материал черно-белых monosheet существенн свет-necuvstvitel6ny1 thermographic записи состоя из thermosensitive элемента и поддержки, thermosensitive элемент содержа существенн свет-necuvstvitel6noe органическое серебряное соль, й.2-диюыдрохыпюеныл-sostavnoe в термально рабочих отношениях therewith и связыватель, при котором сказанное й.2-диюыдрохыпюеныл-sostavnoe представлено формулой (i): R.sup.1 SO.sub.2 R.sup.2, при котором R.sup.1 будет опционно замененными ариловыми группой и R.sup.2 выбрано от группы consist of группа 3,4,5-trihydroxyphenyl, группы 3-alkoxy-4,5-dihydroxyphenyl и группы 3-aryloxy-4,5-dihydroxyphenyl; или сказанное й.2-диюыдрохыпюеныл-sostavnoe представлено формулой (ii): R.sup.3 COOR.sup.4, при котором R.sup.3 будет группой 3-alkoxy-4,5-dihydroxyphenyl или группой 3-aryloxy-4,5-dihydroxyphenyl; и R.sup.4 будет алкиловой группой или ариловой группой; и thermographic процесс записи therefor.

 
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