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    • 72. 发明授权
    • Process for forming contrasty image
    • 形成对比图像的过程
    • US4237214A
    • 1980-12-02
    • US054762
    • 1979-07-05
    • Hiroyuki MifuneShunji TakadaYoshitaka AkimuraNobuyuki Tsujino
    • Hiroyuki MifuneShunji TakadaYoshitaka AkimuraNobuyuki Tsujino
    • G03C5/29G03C1/06G03C1/34G03C5/30
    • G03C1/346G03C1/061Y10S430/15
    • A process for forming a very contrasty negative photographic image which comprises developing a photographic light-sensitive material comprising a support having thereon at least one layer of a negative image monodispersed silver halide photographic emulsion comprising substantially surface latent image type silver halide grains, wherein the average grain size of the silver halide grains is 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of 250 g or less per mol of silver halide, and at least one hydrographic colloid layer containing 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 an alkyl group having 1 to 3 carbon atoms, in the presence of a compound represented by the following general formula (II) or (III): ##STR1## wherein Z.sup.1 and Z.sup.2, which may be the same or different, each represents an atomic group necessary to complete a thiazole ring or a selenazole ring; R.sup.3 and R.sup.5 which may be the same or different, each represents an alkyl group which may be substituted or an alkenyl group which may be substituted; R.sup.4 represents a hydrogen atom or an alkyl group which may be substituted; and R.sup.3 and R.sup.4 may combine to form a ring; L represents a sulfur atom or a divalent hydrocarbon group; X.sup.- represents an acid anion; m represents 0 or 1; n represents 0, 1 or 2 and when an inner salt or inner salts are formed m represents 0 or n represents 0 or 1.
    • 一种用于形成非常对比的负照相图像的方法,其包括显影照相感光材料,其包含其上具有至少一层负极图像单分散卤化银照相乳剂的载体,其包含基本上表面的潜像型卤化银颗粒,其中平均 卤化银颗粒的粒径为0.7微米或更小,卤化银照相乳液含有每摩尔卤化银250克或更少量的粘合剂,以及含有下列化合物的至少一个水解胶体层 通式(I):R1NHNHCOR2(I)其中R1表示芳基,R2表示氢原子,苯基或具有1至3个碳原子的烷基,在下列通式( II)或(III):其中Z1和Z2可以相同或不同,各自代表原子团 p必需完成噻唑环或硒唑环; 可以相同或不同的R 3和R 5各自表示可被取代的烷基或可被取代的烯基; R4表示氢原子或可被取代的烷基; 并且R 3和R 4可以结合形成环; L表示硫原子或二价烃基; X-表示酸性阴离子; m表示0或1; n表示0,1或2,当形成内盐或内盐时,m表示0或n表示0或1。