GB1283218A - Direct positive silver halide photographic material and process - Google Patents
Direct positive silver halide photographic material and processInfo
- Publication number
- GB1283218A GB1283218A GB44082/69A GB4408269A GB1283218A GB 1283218 A GB1283218 A GB 1283218A GB 44082/69 A GB44082/69 A GB 44082/69A GB 4408269 A GB4408269 A GB 4408269A GB 1283218 A GB1283218 A GB 1283218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- silver halide
- derivative
- contain
- positive silver
- 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
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
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
- G03C1/043—Polyalkylene oxides; Polyalkylene sulfides; Polyalkylene selenides; Polyalkylene tellurides
-
- 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
- G03C1/48515—Direct positive emulsions prefogged
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Polyethers (AREA)
Abstract
1283218 Direct-positive silver halide material and process EASTMAN KODAK CO 5 Sept 1969 [9 Sept 1968] 44082/69 Heading G2C A sensitive photographic material comprising a layer of a blue-sensitive direct-positive silver halide composition of which the silver halide comprises at least 50 mole per cent of silver chloride is exposed and treated with a 'lith' developer (i.e. one that contains a polyhydroxybenzene developing agent) in the presence of an alkylene oxide polymer or derivative thereof. The invention also comprises a material as defined above wherein an alkylene oxide polymer or derivative thereof is incorporated in the emulsion layer or an adjacent water-permeable layer. The polymer is preferably derived from ethylene, propylene or butylene oxide, most preferably ethylene oxide and may contain at least 4 ethylene oxide units. The ethylene oxide moiety may have an average molecular weight of 300 to 4000. The polymer may be a block copolymer of polyoxyethylene and polyoxypropylene containing from 10 to 70 per cent by weight of the polyoxyethylene units, the average molecular weight of the polyoxypropylene moiety being between 800 and 3000 or a water soluble organosilicone polyalkylene oxide polymer. The emulsion may contain an electron accepter e.g. a sensitizing dye, and/or a BSI compound (defined in Specification 1186718) e.g. a merocyanine dye. The material may contain an anium salt or a 3-pyrazolidone which increases the development rate. The use of the alkylene oxide polymer or derivative thereof increases the contrast of the images produced.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75858268A | 1968-09-09 | 1968-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1283218A true GB1283218A (en) | 1972-07-26 |
Family
ID=25052265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB44082/69A Expired GB1283218A (en) | 1968-09-09 | 1969-09-05 | Direct positive silver halide photographic material and process |
Country Status (6)
Country | Link |
---|---|
US (1) | US3615519A (en) |
BE (1) | BE738619A (en) |
CH (1) | CH522241A (en) |
DE (1) | DE1945450C3 (en) |
FR (1) | FR2017655A1 (en) |
GB (1) | GB1283218A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5141055B2 (en) * | 1972-02-24 | 1976-11-08 | ||
JPS496918A (en) * | 1972-05-09 | 1974-01-22 | ||
GB1463659A (en) * | 1973-06-01 | 1977-02-02 | Agfa Gevaert | Development of exposed silver halide material in the presence of polyoxyalkylenes |
US4009041A (en) * | 1974-10-03 | 1977-02-22 | Polaroid Corporation | Fogged, direct-positive silver halide emulsion containing a gallium sulfide semiconductor |
US4273862A (en) * | 1977-06-11 | 1981-06-16 | Mitsubishi Paper Mills, Ltd. | Direct-positive silver halide photographic sensitive materials |
DE2802016C2 (en) * | 1978-01-18 | 1985-05-09 | Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf | Lith type photographic material |
US5550013A (en) * | 1994-12-22 | 1996-08-27 | Eastman Kodak Company | High chloride emulsions having high sensitivity and low fog and improved photographic responses of HIRF, higher gamma, and shoulder density |
US6303284B1 (en) | 2000-08-24 | 2001-10-16 | Eastman Kodak Company | Process for manufacture of photographic emulsion |
US6326134B1 (en) | 2000-08-24 | 2001-12-04 | Eastman Kodak Company | Process for manufacture of photographic emulsion |
CN114509926A (en) * | 2021-11-24 | 2022-05-17 | 福建中安高新材料研究院有限公司 | Developing solution, preparation method thereof and developing method of photoresist |
-
1968
- 1968-09-09 US US758582A patent/US3615519A/en not_active Expired - Lifetime
-
1969
- 1969-09-05 GB GB44082/69A patent/GB1283218A/en not_active Expired
- 1969-09-08 DE DE1945450A patent/DE1945450C3/en not_active Expired
- 1969-09-09 BE BE738619D patent/BE738619A/xx not_active IP Right Cessation
- 1969-09-09 FR FR6930559A patent/FR2017655A1/fr not_active Withdrawn
- 1969-09-09 CH CH1365869A patent/CH522241A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE1945450B2 (en) | 1978-10-12 |
FR2017655A1 (en) | 1970-05-22 |
BE738619A (en) | 1970-02-16 |
DE1945450C3 (en) | 1979-07-05 |
CH522241A (en) | 1972-06-15 |
DE1945450A1 (en) | 1970-04-02 |
US3615519A (en) | 1971-10-26 |
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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 |