公开(公告)号：US4806461A

公开(公告)日：1989-02-21

申请号：US165085

申请日：1988-03-07

申请人： Hideo Ikeda ,  Munehisa Fujita ,  Shingo Ishimaru ,  Hiroshi Ayato ,  Shigeharu Urabe

发明人： Hideo Ikeda ,  Munehisa Fujita ,  Shingo Ishimaru ,  Hiroshi Ayato ,  Shigeharu Urabe

IPC分类号： G03C1/035 ,  G03C1/005 ,  G03C1/18 ,  G03C1/02

CPC分类号： G03C1/0051 ,  G03C1/18

摘要： A silver halide emulsion comprises a dispersion medium and silver halide grains, the silver halide emulsion containing tabular silver halide grains having a thickness of less than 0.5 .mu.m, a diameter of 0.3 .mu.m or more, and a mean diameter-to-thickness ratio of 2 or more. The tabular grains occupy at least 50% of a projected area of all the silver halide grains, and 50% or more (number) of the tabular grains include 10 or more dislocations per grain. A photographic light-sensitive material comprises the aforementioned silver halide emulsion.

公开(公告)号：US5059517A

公开(公告)日：1991-10-22

申请号：US542683

申请日：1990-06-25

申请人： Mikio Ihama ,  Yuji Kume ,  Koji Tamoto ,  Hiroshi Ayato

发明人： Mikio Ihama ,  Yuji Kume ,  Koji Tamoto ,  Hiroshi Ayato

IPC分类号： G03C1/035 ,  G03C1/005 ,  G03C1/16 ,  G03C1/18 ,  G03C1/20 ,  G03C1/22 ,  G03C1/26 ,  G03C1/34

CPC分类号： G03C1/0051 ,  G03C1/16 ,  G03C1/18 ,  G03C1/20 ,  G03C1/22 ,  G03C1/26 ,  G03C1/34 ,  G03C2001/03511 ,  G03C2001/03517 ,  G03C2001/03535

摘要： Disclosed is a silver halide photographic emulsion containing tabular silver bromide series grains having a mean aspect ratio of 2 or more, which is characterized by the grains having no projection on the grain surface and by the silver chloride content in the surface part of the grains being higher than that in the part of the grain which is underneath the grain surface. Also disclosed is a multi-layer photographic light-sensitive material having at least two silver halide emulsion layers on a support in which at least one of the silver halide emulsion layers contains the tabular silver bromide series grains as defined above. By the incorporation of the emulsion, the sensitivity, the storage stability and the manufacture stability properties of the photographic material are improved without deteriorating its graininess property.

摘要翻译： 公开了一种含有平均纵横比为2以上的片状溴化银系列的卤化银照相乳剂，其特征在于颗粒表面上没有突起的颗粒和晶粒表面部分中的氯化银含量 高于颗粒表面下部分的颗粒。 还公开了一种多层照相感光材料，其在载体上具有至少两个卤化银乳剂层，其中至少一个卤化银乳剂层含有如上所定义的片状溴化银系列颗粒。 通过引入乳液，改善了感光材料的敏感性，储存稳定性和制造稳定性，而不会降低其颗粒性。

公开(公告)号：US5043258A

公开(公告)日：1991-08-27

申请号：US536034

申请日：1990-06-12

申请人： Mikio Ihama ,  Yuji Kume ,  Koji Tamoto ,  Hiroshi Takehara ,  Hiroshi Ayato ,  Yoichi Suga ,  Seiichiro Kishida

发明人： Mikio Ihama ,  Yuji Kume ,  Koji Tamoto ,  Hiroshi Takehara ,  Hiroshi Ayato ,  Yoichi Suga ,  Seiichiro Kishida

IPC分类号： G03C1/005 ,  G03C1/035 ,  G03C1/16 ,  G03C1/18

CPC分类号： G03C1/035 ,  G03C1/0051 ,  G03C1/16 ,  G03C1/18 ,  G03C2001/03523

摘要： A silver halide photographic emulsion is described which has excellent color-sensitizing efficiency by sensitizing dyes, sharpness, covering power, and pressure resistant properties, wherein the grains are comprised of core/shell type grains having contained therein a partially halogen-converted silver salt phase, the silver salt comprising silver halochloride, silver thiocyanate or silver citrate.