GB1391072A - Photographic direct-positive process - Google Patents
Photographic direct-positive processInfo
- Publication number
- GB1391072A GB1391072A GB1097972A GB1097972A GB1391072A GB 1391072 A GB1391072 A GB 1391072A GB 1097972 A GB1097972 A GB 1097972A GB 1097972 A GB1097972 A GB 1097972A GB 1391072 A GB1391072 A GB 1391072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grains
- layer
- emulsion
- fogging
- unfogged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 3
- 239000000839 emulsion Substances 0.000 abstract 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 150000002500 ions Chemical class 0.000 abstract 2
- 229910052741 iridium Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 229910021645 metal ion Inorganic materials 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- -1 silver halide Chemical class 0.000 abstract 2
- 229910052787 antimony Inorganic materials 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052762 osmium Inorganic materials 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- 229910052703 rhodium Inorganic materials 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 230000001235 sensitizing effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/485—Direct positive emulsions
- G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12300771A | 1971-03-10 | 1971-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1391072A true GB1391072A (en) | 1975-04-16 |
Family
ID=22406186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1097972A Expired GB1391072A (en) | 1971-03-10 | 1972-03-09 | Photographic direct-positive process |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3761267A (enrdf_load_stackoverflow) |
| JP (1) | JPS5636411B1 (enrdf_load_stackoverflow) |
| AU (1) | AU461423B2 (enrdf_load_stackoverflow) |
| BE (1) | BE780540A (enrdf_load_stackoverflow) |
| CA (1) | CA976406A (enrdf_load_stackoverflow) |
| FR (1) | FR2128799B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1391072A (enrdf_load_stackoverflow) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3890154A (en) * | 1969-12-24 | 1975-06-17 | Fuji Photo Film Co Ltd | Light-sensitive silver halide photographic materials |
| US4081281A (en) * | 1972-02-18 | 1978-03-28 | Agfa-Gevaert N.V. | Developing low fogged, direct-positive silver halide emulsion with an energetic developer free from halide ions |
| JPS5031824B2 (enrdf_load_stackoverflow) * | 1972-08-31 | 1975-10-15 | ||
| US3923513A (en) * | 1973-01-18 | 1975-12-02 | Eastman Kodak Co | Direct positive processing of silver halide with metal dopants in diffusion transfer films |
| JPS51135528A (en) * | 1975-05-19 | 1976-11-24 | Fuji Photo Film Co Ltd | Spectrally sensitized silver halide photographic emulsions |
| US4030920A (en) * | 1976-04-12 | 1977-06-21 | Eastman Kodak Company | Processing compositions containing glycols for color transfer processes comprising direct positive silver halide developement |
| JPS6055820B2 (ja) * | 1979-03-26 | 1985-12-06 | コニカ株式会社 | 直接ポジハロゲン化銀写真感光材料 |
| US4269927A (en) * | 1979-04-05 | 1981-05-26 | Eastman Kodak Company | Internally doped surface sensitized high chloride silver halide emulsions and photograhic elements and processes for their preparation |
| JPS58120248A (ja) * | 1982-01-12 | 1983-07-18 | Konishiroku Photo Ind Co Ltd | 直接ポジ画像形成方法 |
| DE3586719T2 (de) * | 1984-12-30 | 1993-03-25 | Konishiroku Photo Ind | Verfahren zur bildung eines positiven bildes. |
| JPH0758389B2 (ja) * | 1986-08-14 | 1995-06-21 | 富士写真フイルム株式会社 | 直接ポジカラ−画像形成方法 |
| US5491058A (en) | 1994-08-09 | 1996-02-13 | Eastman Kodak Company | Film for duplicating silver images in radiographic films |
| EP0699946B1 (en) | 1994-08-26 | 2001-01-17 | Eastman Kodak Company | Ultrathin tabular grain emulsions with sensitization enhancements (II) |
| DE69517372T2 (de) | 1994-08-26 | 2001-02-15 | Eastman Kodak Co., Rochester | Tafelkornemulsionen mit verbesserter Sensibilisierung |
| EP0754967A1 (en) | 1995-07-14 | 1997-01-22 | Agfa-Gevaert N.V. | Photographic direct positive material containing a particular stabilizer |
| US5792601A (en) | 1995-10-31 | 1998-08-11 | Eastman Kodak Company | Composite silver halide grains and processes for their preparation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE550907A (enrdf_load_stackoverflow) * | ||||
| US2497875A (en) * | 1947-10-17 | 1950-02-21 | Eastman Kodak Co | Direct positive photographs using aerial fogging developer |
| FR1484742A (fr) * | 1965-04-30 | 1967-06-16 | Agfa Gevaert Nv | Méthode pour la production d'images photographiques positives directes |
| US3574625A (en) * | 1967-04-07 | 1971-04-13 | Eastman Kodak Co | Photographic systems with polyvalent metal ions contiguous to the silver halide grains |
-
1971
- 1971-03-10 US US00123007A patent/US3761267A/en not_active Expired - Lifetime
-
1972
- 1972-02-08 CA CA134,162A patent/CA976406A/en not_active Expired
- 1972-03-08 AU AU39765/72A patent/AU461423B2/en not_active Expired
- 1972-03-09 GB GB1097972A patent/GB1391072A/en not_active Expired
- 1972-03-10 BE BE780540A patent/BE780540A/xx unknown
- 1972-03-10 FR FR7208345A patent/FR2128799B1/fr not_active Expired
- 1972-03-10 JP JP2461072A patent/JPS5636411B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2128799B1 (enrdf_load_stackoverflow) | 1976-03-05 |
| US3761267A (en) | 1973-09-25 |
| CA976406A (en) | 1975-10-21 |
| BE780540A (fr) | 1972-07-03 |
| DE2211769B2 (de) | 1977-06-16 |
| FR2128799A1 (enrdf_load_stackoverflow) | 1972-10-20 |
| AU461423B2 (en) | 1975-05-08 |
| JPS5636411B1 (enrdf_load_stackoverflow) | 1981-08-24 |
| DE2211769A1 (de) | 1972-09-21 |
| AU3976572A (en) | 1973-09-13 |
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| Publication | Publication Date | Title |
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| GB1391072A (en) | Photographic direct-positive process | |
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| GB1225526A (enrdf_load_stackoverflow) | ||
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |