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1. 发明专利

DE3206342A1 未知
公开(公告)号：DE3206342A1
公开(公告)日：1982-09-09
申请号：DE3206342
申请日：1982-02-22
申请人： KONISHIROKU PHOTO IND
发明人： ITOH NOBORU , TAKAHASHI TOSHIAKI , OGI KEIJI , KAMATAKAHARA ATSUSHI
IPC分类号： G03C1/035 , G03C1/08 , G03C1/725 , G03C1/00 , G03C1/72

2. 发明专利

DE3621561A1 未知
公开(公告)号：DE3621561A1
公开(公告)日：1987-01-08
申请号：DE3621561
申请日：1986-06-27
申请人： KONISHIROKU PHOTO IND
发明人： TOSAKA YASUO , OGI KEIJI , KAMITAKAHARA ATSUSHI
IPC分类号： G03C7/00 , G03C1/485 , G03C7/30 , G03C7/26 , G03C7/32 , G03C7/18
摘要： In a light-sensitive direct posi silver halide color photographic material having photographic constituent layers comprising at least one silver halide emulsion layer containing latent image type silver halide grains not previously fogged, which is capable of giving a direct posi image by subjecting the whole surface to exposure or effecting surface development in the presence of a fogging agent, after image exposure, the improvement wherein said internal latent image type silver halide grains are composed of at least two groups of internal latent image type silver halide grains having average grain sizes different from each other, and at least one compound capable of releasing a development inhibiting substance or its precursor through the reaction with the oxidized product of a color developing agent is contained in at least one layer of said photographic constituent layers. According to the present invention, there can be obtained a direct posi color photographic material improved in processing stability, having smooth gradation and excellent image quality, in which the respective photographic performances of at least two groups of internal latent type silver halide grains having grains sizes different from each other are fully utilized.

3. 发明专利

DE2752334A1 未知
公开(公告)号：DE2752334A1
公开(公告)日：1978-06-01
申请号：DE2752334
申请日：1977-11-23
申请人： KONISHIROKU PHOTO IND
发明人： SUGA TSUNEO , OGI KEIJI , EGAMI KENJI , HACHIOHJI TOKIO
IPC分类号： G03C1/485 , G03C5/50 , G03C7/00 , G03C5/26 , G03C5/54
摘要： A process for forming a direct positive image by developing, after imagewise exposure to an internal latent image type light-sensitive silver halide photographic material, with a surface developer for silver halide, which process comprises incorporating at least one fogging agent selected from hydrazine compounds, N-substituted cycloammonium salts and benzimidazole derivatives in combination with an amineborane compound into said light-sensitive silver halide photographic material, said surface developer and/or a treating bath used prior to the treatment by said surface developer.

4. 发明专利

DE3854662D1 未知
公开(公告)号：DE3854662D1
公开(公告)日：1995-12-14
申请号：DE3854662
申请日：1988-08-19
申请人： KONISHIROKU PHOTO IND
发明人： YOSHIZAWA TOMONI , OGI KEIJI , KAMITAKAHARA ATUSHI
IPC分类号： G03C1/12 , G03C1/16 , G03C1/18 , G03C1/29 , G03C1/485 , G03C1/83 , G03C7/00 , G03C7/30 , G03C7/26
摘要： A direct positive silver halide light-sensitive color photographic material comprising, on a support, (1) at least three light-sensitive silver halide emulsion layers containing internal latent image-type light-sensitive silver halide grains, (2) specific sensitizing dyes having formulas [I], [II] and [III], respectively defined in the specification, and (3) at least one anti-irradiation compound selected from the group consisting of those compounds having formulas [IV], [V] and [VI], respectively defined in the specification, is disclosed.

5. 发明专利

DE2945136A1 未知
公开(公告)号：DE2945136A1
公开(公告)日：1980-05-22
申请号：DE2945136
申请日：1979-11-08
申请人： KONISHIROKU PHOTO IND
发明人： OGI KEIJI , SASAKI TAKASHI , TOSAKA YASUO
IPC分类号： G03C1/485
摘要： This invention relates to a light-sensitive, direct positive silver halide photographic material, more particularly to a light-sensitive silver halide photographic material of internal latent image type containing a novel, development-accelerating compound, as used for the formation of a direct positive image by imagewise exposure followed by overall light-exposure before and/or during development or development treatment in the presence of a fogging agent.

6. 发明专利

DE2728108A1 Direct positive imaging process using silver halide material - prepd. by ammonia process, giving high stability, speed and contrast 未知
公开(公告)号：DE2728108A1
公开(公告)日：1977-12-29
申请号：DE2728108
申请日：1977-06-22
申请人： KONISHIROKU PHOTO IND
发明人： SUGA TSUNEO , OGI KEIJI , EGAMI KENJI , HACHIOJI TOKIO
IPC分类号： G03C7/00 , G03C1/485
摘要： Direct positive imaging process is carried out with Ag halide (AgX) material contg. AgX grains produced by the ammonia process, which contain 0-10 mole % AgI and are not fogged before selective exposure. After selective exposure, and during or before development with a surface developer, the material is given a blanket exposure in the presence of a foggant. Good image stability, higher speed and Dmax and lower Dmin are possible. The material can be used in black-and-white, colour and colour diffusion transfer photography. In an example, for material prepd. (a) by the neutral process, (b) by the ammonia process or (c) reversal material, the values obtd. were Dmax (a) 1.5, (b) 1.50, (c) 1.06, Dmin (a) 0.10, (b) 0.10, (c) 0.08 and relative speed (a) 400, (b) 2000, (c) 100.

7. 发明专利

DE3853639D1 未知
公开(公告)号：DE3853639D1
公开(公告)日：1995-06-01
申请号：DE3853639
申请日：1988-02-03
申请人： KONISHIROKU PHOTO IND
发明人： OGI KEIJI , KAMITAKAHARA ATSUSHI , SAKAMOTO EIICHI , ISOZAKI NARIKO
IPC分类号： G03C1/015 , G03C1/035 , G03C1/485
摘要： A light-sensitive silver halide direct-positive photographic material which comprises a support and, provided thereon a light-sensitive direct-positive silver halide emulsion layer containing silver halide grains having an internal latent image and a core-shell structure comprising a core and at least one shell stratum either partly or eitirely covering said core, the outermost stratum of said shell having been formed in the presence of a nitrogen-containing heterocyclic compound having a mercapto group therein.

8. 发明专利

DE3786974T2 未知
公开(公告)号：DE3786974T2
公开(公告)日：1994-03-03
申请号：DE3786974
申请日：1987-09-29
申请人： KONISHIROKU PHOTO IND
发明人： KAMITAKAHARA ATUSHI , OGI KEIJI
IPC分类号： G03C1/035 , G03C1/485 , G03C7/413

9. 发明专利

GB2110419B METHOD FOR THE FORMATION OF A DIRECT POSITIVE IMAGE 未知
公开(公告)号：GB2110419B
公开(公告)日：1985-10-09
申请号：GB8230123
申请日：1982-10-21
申请人： KONISHIROKU PHOTO IND
发明人： TOSAKA YASUO , OGI KEIJI
IPC分类号： G03C5/50 , G03C1/485 , G03C7/30
摘要： A method for obtaining direct positive images wherein a photographic material having a support and at least two silver halide emulsion layers coated thereon, each layer having a different spectral sensitivity, said emulsions being of the internal latent image type and containing unfogged silver halide crystals, is imagewise exposed and then subjected to an overall area exposure prior to or during the development thereof to form the image. The overall area exposure is such that the photographic intensity ratios between various layers are not more than 6 and the intensity of such overall exposure has a value between light intensities which give 0.8 times the maximum image density of the particular emulsion layer and 10 times that light intensity value. The photographic intensity ratio is the ratio between photographic intensities of two emulsion layers and the photographic intensity is the reciprocal of the intensity value that corresponds to an image density which is 50% of the maximum when an imagewise-unexposed internal latent type image silver halide emulsion layer is subjected to light-intensity scale exposure and the density of the image formed is measured with a light which corresponds to the absorption maximum of the image.

10. 发明专利

DE3205897A1 未知
公开(公告)号：DE3205897A1
公开(公告)日：1983-01-20
申请号：DE3205897
申请日：1982-02-18
申请人： KONISHIROKU PHOTO IND
发明人： ITOH NOBORU , TAKAHASHI TOSHIAKI , OGI KEIJI , KAMITAKAHARA ATSUSHI
IPC分类号： C01G3/04 , G03C1/725 , G03C1/72 , G03C1/50 , C30B29/12
摘要： Disclosed is a method for preparing a light-sensitive cuprous halide emulsion which comprises reducing cupric ions by an ascorbic acid derivative represented by the general formula: wherein R is a hydrogen atom or a hydroxyl group, and n is an integer of 1 to 4, provided that R is a hydroxyl group when n is 1, or its alkali metal salt, in the presence of halogen ions.

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