| 摘要 |
PURPOSE:To increase effective reducing width and to prevent the generation of residue by processing the silver image obtd. by exposing and developing of a silver halide photosensitive material with a ceric salt reducer. CONSTITUTION:The silver image formed by exposing and developing the silver halide photosensitive material is reduced by using the reducer consisting essentially of the ceric salt. Such reducing is executed in the presence of the compd. expressed by formula I (M is H, alkali metallic atom, -NH4, R is H, alkyl, SO3M<1>, COOM<1>, R<1> is -SO3M<1>, -COOM<1>, -OH where M<1> is synonymous with M, n is 1-6) or the formula IIA-(CH2)n-SM (M is the group of formula III, R<2> is H, alkyl, etc. A is -OH, -SO3M<1>, -NR3R4, M<1> is H or alkaline metallic atom, X<-> is halogen atom, etc., n is 2-5). The above-mentioned compd. may be incorporated into the reducer or be made present in the previous bath prior to the reducing process. The area of the silver image is thus decreased while the decrease in the density of the silver image is suppressed. |
