Developing silver halide in the presence of sulfite ion,...

Details Developing silver halide in the presence of sulfite ion,... Developing silver halide in the presence of sulfite ion,...

G - Physics

03

C

96/113, 96/61

G03C 5/30 (2006.01) G03C 5/305 (2006.01)

Patent

CA 1134664

?-2A-19480/KT/78 ABSTRACT OF THE DISCLOSURE A process for producing a high contrast photographic image comprising developing an image-wise exposed silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer with a developer containing (a) free sulfite ion in a concentration of at least 0.18 mol/? and (b) as substantially the only developing agent a dihydroxybenzene in the presence of (i) at least one compound represented by the following general formula (I); R1NHNHCOR2 (I) wherein R1 represents an aryl group; R2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms and (ii) at least one polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof.

310252

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