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    • 56. 发明授权
    • Silver halide photographic emulsions and image forming process
    • 卤化银照相乳剂和成像工艺
    • US4224401A
    • 1980-09-23
    • US967546
    • 1978-12-07
    • Shunji TakadaYoshitaka AkimuraHiroyuki MifuneNobuyuki Tsujino
    • Shunji TakadaYoshitaka AkimuraHiroyuki MifuneNobuyuki Tsujino
    • G03C1/06G03C5/30
    • G03C1/061
    • A negative image silver halide photographic emulsion comprising substantially surface latent image type monodispersed silver bromide or silver iodobromide grains containing up to about 10 mol% silver iodide, wherein the average grain size of the silver halide grains is about 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of about 250 g or less per mol of silver halide and a compound represented by the following general formula (I):R.sup.1 NHNHCOR.sup.2 (I)wherein R.sup.1 represents an aryl group and R.sup.2 represents a hydrogen atom, a phenyl group or a straight or branched chain alkyl group having 1 to 3 carbon atoms; a silver halide photographic light-sensitive element comprising a support having thereon at least one layer of a negative image silver halide photographic emulsion comprising substantially surface latent image type monodispersed silver bromide or silver iodobromide grains containing up to about 10 mol% silver iodide, wherein the average grain size of the silver halide grains is about 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of about 250 g or less per mol of silver halide, and the silver halide photographic emulsion or at least one other hydrophilic colloid layer on the support containing a compound represented by the general formula (I) above; and an image forming process which comprises imagewise exposing to light the photographic light-sensitive material described above and developing the photographic light-sensitive material with a developing solution containing at least one dihydroxybenzene in an amount of about 0.05 mol/liter to about 0.5 mol/liter and about 0.15 mol/liter or more of sulfite ion and having a pH of about 11.0 to about 12.3 whereby a high contrast image is obtained wherein the amount of the compound of the formula (I) is 10.sup.-4 to 10.sup.-1 mol/molAg.
    • 包含基本上表面潜影型单分散溴化银或含有最多约10mol%碘化银的碘溴化银颗粒的负型卤化银照相乳剂,其中卤化银颗粒的平均晶粒尺寸为约0.7微米或更小,银 卤化物照相乳剂,其含有每摩尔卤化银约250克或更少量的粘合剂和由以下通式(I)表示的化合物:其中R1表示芳基且R2表示氢原子的R1NHNHCOR2(Ⅰ) 苯基或具有1至3个碳原子的直链或支链烷基; 一种卤化银照相感光元件,其包括其上具有至少一层负影像卤化银照相乳剂的载体,其包含基本上表面潜影型单分散溴化银或含有最多约10mol%碘化银的碘溴化银颗粒,其中 卤化银颗粒的平均晶粒尺寸为约0.7微米或更小,其中卤化银照相乳剂含有每摩尔卤化银约250克或更少量的粘合剂,以及卤化银照相乳剂或至少一种其它 含有上述通式(I)表示的化合物的载体上的亲水胶体层; 以及图像形成方法,其包括使上述照相感光材料成像曝光并用含有至少一种二羟基苯的显影溶液显影照相感光材料,其量为约0.05mol / l至约0.5mol / 升和约0.15mol / l或更多的亚硫酸根离子并且具有约11.0至约12.3的pH值,由此获得高对比度图像,其中式(I)化合物的量为10-4至10-1mol / molAg。