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AssigneeFuji Photo Film Co., Ltd.
InventorsTatsuo Nishimura, Hiroyuki Mifune, Yoshiharu Fuseya, Yukihide Urata, Tadao Shishido, Yasuo Kasama
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A lithographic silver halide photographic light-sensitive material is described which scarcely exhibits colored fringe and black pepper, forms halftone dots of good quality whether a fresh or an exhausted developer is used for processing thereof, and which scarcely shows a drop in sensitivity even when a developer contaminated by a fixing solution is used; said material comprises a support and at least one lithographic silver halide emulsion layer, and containing in said emulsion layer or in another hydrophilic colliodal layer which does not contain silver halide emulsion at least one compound represented by formula (I) ##STR1## wherein M represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ; X represents --SO.sub.2 NHR', --COOM', --SO.sub.3 M', --OH or --CONH.sub.2, wherein M' represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ; and R' represents hydrogen or an alkyl group having from 1 to 3 carbon atoms; R represents hydrogen or an alkyl group having from 1 to 3 carbon atoms; and n represents 1 or 2.
A lithographic silver halide photographic light-sensitive material comprising a support and at least one lithographic silver halide emulsion layer, the silver halides of said at least one silver halide emulsion layer being silver chlorobromide and silver chloroiodobromide in which at least 60 mole % of silver chloride and 0 to 5 mol % of silver iodide are contained, and containing in said emulsion layer or in another hydrophilic colloidal layer which does not contain silver halide at least one compound represented by formula (I) ##STR7## wherein M represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ;
A process for forming a high contrast silver image which comprises processing a lithographic silver halide photographic light-sensitive material comprising a support and at least one lithographic silver halide emulsion layer, and containing in said emulsion layer or in another hydrophilic colloidal layer which does not contain silver halide emulsion at least one compound represented by formula (I) with a lith developer ##STR8## wherein M represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ;
Dependencies are inferred from the claim text.