公开(公告)号：US4939078A

公开(公告)日：1990-07-03

申请号：US247172

申请日：1988-09-21

申请人： Kazuya Kuramoto ,  Bunzo Ueda ,  Yasuo Tosaka

发明人： Kazuya Kuramoto ,  Bunzo Ueda ,  Yasuo Tosaka

IPC分类号： G03C7/30

CPC分类号： G03C7/3022

摘要： A direct positive type silver halide photographic material and developing method therefor are disclosed. The photographic material have blue-, green- and red-sensitive emulsion layers and each of these emulsion layer contains at least two kinds of silver halide emulsion being different from each other in average grain size. The average grain diameter S of the emulsion having the smallest average grain size and the average grain diameter of the emulsion having the largest average grain size in each emulsion layer have a proportional relation of 1.6.ltoreq.L/S. The emulsion having the smallest average grain size is contained in a ratio of from 2 to 50% in the blue-sensitive layer and 2 to 40% in green- and red-sensitive emulsion layer.

公开(公告)号：US4990432A

公开(公告)日：1991-02-05

申请号：US440484

申请日：1989-11-24

申请人： Hajime Komatsu ,  Susumu Ohkawachi ,  Yasuo Tosaka ,  Bunzo Ueda ,  Keiichi Hoshimo

发明人： Hajime Komatsu ,  Susumu Ohkawachi ,  Yasuo Tosaka ,  Bunzo Ueda ,  Keiichi Hoshimo

IPC分类号： G03C1/76 ,  G03C1/825 ,  G03C7/30

CPC分类号： G03C7/3029 ,  G03C1/76 ,  G03C1/825

摘要： A silver halide photographic light-sensitive material comprising a reflective support having a transmission density of not more than 0.8, having thereon, a photographic component layer comprising a silver halide emulsion layer and a layer including at least one anti-halation layer formed closer to said support than said silver halide emulsion layer is disclosed. In the photographic material, degradation of image sharpness due to use of a reflective support having low transmission density is prevented.

摘要翻译： 一种卤化银照相感光材料，其包含透射密度不大于0.8的反射性支持体，其上具有包含卤化银乳剂层的照相组分层和包含至少一层形成为更接近所述卤化银乳剂层的防反射层的层 公开了所述卤化银乳剂层的支撑体。 在照相材料中，防止了由于使用具有低透射密度的反射支撑体导致的图像清晰度的劣化。

公开(公告)号：US3932188A

公开(公告)日：1976-01-13

申请号：US552262

申请日：1975-02-24

申请人： Akira Tanaka ,  Kiyoshi Futaki ,  Bunzo Ueda

发明人： Akira Tanaka ,  Kiyoshi Futaki ,  Bunzo Ueda

IPC分类号： C09B23/00 ,  G03C1/825 ,  G03C1/83 ,  G03C1/84

CPC分类号： G03C1/832

摘要： Irradiation and halation of a silver halide photographic lightsensitive material can be prevented by adding at least one of dyes represented by the following general formula to the layers on one or both sides of the light sensitive material. ##SPC1##(wherein X is hydrogen atom, hydroxyl group, a halogen atom or a lower alkyl group, L is a methine group which may be substituted with a lower alkyl group at mesoposition, M is hydrogen atom, an alkali metal or ammonium group and n is 1 or 2).

摘要翻译： 通过将至少一种由以下通式表示的染料加入感光材料的一面或两面上的层，可以防止卤化银照相感光材料的照射和晕倒。