Thermographic recording element
AssigneeFuji Photo Film Co., Ltd.
InventorsKohzaburoh Yamada, Toshiaki Kubo, Hiroyuki Suzuki
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Abstract
A thermographic recording element having at least one image forming layer contains an organic silver salt, a reducing agent, and optionally, a photosensitive silver halide. The element further contains a substituted alkene derivative of specific structure and preferably a specific hydrazine derivative. The element can be processed in a fully dry basis to produce images having high Dmax and gradation and free of black pepper.
Claims5
A thermographic recording element having at least one image forming layer, said element comprising an organic silver salt, a reducing agent, and at least one of substituted alkene derivatives of formulas (1), (2), (4)-(6) and (8)-(13):
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- wherein W is an electron attractive group;
- D is an electron donative group which may be substituted or unsubstituted and is at least one selected from the group consisting of hydroxy groups, salts of hydroxy groups, mercapto groups, salts of mercapto groups, alkoxy groups, alkylthio groups, arylthio groups, amino groups, alkylamino groups, arylamino groups and phenyl groups having an electron donative group as a substituent;
- H is hydrogen;
- the groups represented by W or D attached to the same carbon atom, taken together, may form a cyclic structure, the compound may assume either a trans, or a cis structure when both trans and cis structures are possible with respect to W or D.
A thermographic recording element having at least one image forming layer, said element comprising an organic silver salt, a reducing agent, and a substituted alkene derivatives of formula (11):
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- wherein W is an electron attractive group;
- D is an electron donative group which may be substituted or unsubstituted and is at least one selected from the group consisting of hydroxy groups, salts of hydroxy groups, mercapto groups, salts of mercapto groups, alkoxy groups, alkylthio groups, arylthio groups, amino groups, alkylamino groups, arylamino groups and phenyl groups having an electron donative group as a substituent;
- H is hydrogen;
- the groups represented by W or D attached to the same carbon atom, taken together, may form a cyclic structure, the compound may assume either a trans or a cis structure when both trans and cis structures are possible with respect to W or D.
Dependencies are inferred from the claim text.