Process for development of black-and-white- silver halide photographic material
AssigneeFuji Photo Film Co., Ltd.
InventorEiichi Okutsu
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Abstract
The present invention improves the running stability of a developer comprising an ascorbic acid instead of hydroquinone as a developing agent. The present invention provides a process for development of a black-and-white silver halide photographic material, which comprises use of a development replenisher for black-and-white silver halide photographic material comprising an ascorbic acid and/or derivative thereof which has a pH value of at least 0.5 higher than that of the development starting solution.
Claims9
A process for developing an exposed black-and-white silver halide photographic material with an automatic developing machine, which comprises processing the black-and-white silver halide photographic material in a development starting solution and adding a development replenisher solution to the development starting solution, wherein each of said development starting solution and development replenisher solution comprises ascorbic acid and/or a derivative thereof, and the development replenisher solution has a pH value of at least 0.5 higher than that of the development starting solution.
A process for developing an exposed black-and-white silver halide photographic material with an automatic developing machine, which comprises processing the black-and-white silver halide photographic material in a development starting solution and adding a development replenisher solution to the development starting solution, wherein each of said development starting solution and development replenisher solution comprises ascorbic acid and/or a derivative thereof and a carbonate in an amount of not less than 0.5 mol/l, and the development replenisher solution has a pH value of at least 0.3 higher than that of the development starting solution.
Dependencies are inferred from the claim text.