GB1228868A - - Google Patents
Info
- Publication number
- GB1228868A GB1228868A GB1228868DA GB1228868A GB 1228868 A GB1228868 A GB 1228868A GB 1228868D A GB1228868D A GB 1228868DA GB 1228868 A GB1228868 A GB 1228868A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mole per
- per cent
- bromide
- examples
- silver halide
- 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
- G03C1/053—Polymers obtained by reactions involving only carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
-
- 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
1,228,868. High contrast photographic silver halide materials. EASTMAN KODAK CO. Aug. 15, 1968 [Aug.18, 1967], No.39109/68. Heading G2C. A photographic material comprises a support bearing a layer of a high contrast silver halide emulsion (defined as one in which the halide comprises at least 50 mole per cent chloride and less than 5 mole per cent iodide, the remainder being bromide, said emulsion when exposed on a sensitometer and developed for 2 minutes at 20‹C. in the developer whose composition is: sodium sulphite (anhydrous) 30 g., paraformaldehyde 7À5 g., potassium metabisulphite 2À6 g., boric acid (crystalline) 7À5 g., hydroquinone 22À5 g., potassium bromide 1À6 g., and water to make 1000 ml., has a gamma of at least 4 measured between a density of 0À3 and 3À0) containing dispersed therein a waterinsoluble vinylpolymer, the halide of which emulsion comprising at least 85 mole per cent chloride, 0À1 to 5À0 mole per cent iodide and the balance bromide. In the examples the use of copoly (methylacrylatesulphopropyl acrytate) and copoly (methylacrylatesulphopropyl acrylate -2-acetoacetoxy-ethyl methacrylate) is disclosed. The silver halide emulsion, used in the examples, according to the present invention contains 90 mole per cent chloride, 9 mole per cent bromide and 1 mole per cent iodide. The examples also disclose other silver halide emulsions by way of comparison. A method of processing a high contrast photographic material as defined above comprises inserting the imagewise exposed material into a continuous transport processing machine in which the developer solution is one capable of infectious development. The developer solution may contain a carbonyl bisulphite-amine condensation product and may also contain a dihydroxybenzene developing agent. The developer preferably contains 0À05 to 0À5 mole per litre of the developing agent and 0À10 to 1À0 mole per litre of the condensation product. In the examples sodium bis-(2-hydroxyethyl) aminomethane sulphonate is the condensation product and hydroquinone is used as the developing agent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66153067A | 1967-08-18 | 1967-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1228868A true GB1228868A (en) | 1971-04-21 |
Family
ID=24653987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1228868D Expired GB1228868A (en) | 1967-08-18 | 1968-08-15 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3625689A (en) |
| BE (1) | BE719512A (en) |
| DE (1) | DE1797088A1 (en) |
| FR (1) | FR1575382A (en) |
| GB (1) | GB1228868A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1179519B (en) * | 1984-12-17 | 1987-09-16 | Minnesota Mining & Mfg | PHOTOSENSITIVE MATERIAL WITH SILVER HALIDES FOR OBTAINING HALF-TINTED BLACK AND WHITE IMAGES AND METHOD FOR REPRODUCTION WITH HALF TINT AT HIGH CONTRAST |
-
1967
- 1967-08-18 US US661530A patent/US3625689A/en not_active Expired - Lifetime
-
1968
- 1968-08-06 FR FR1575382D patent/FR1575382A/fr not_active Expired
- 1968-08-14 BE BE719512D patent/BE719512A/xx unknown
- 1968-08-14 DE DE19681797088 patent/DE1797088A1/en active Pending
- 1968-08-15 GB GB1228868D patent/GB1228868A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3625689A (en) | 1971-12-07 |
| DE1797088A1 (en) | 1970-11-05 |
| BE719512A (en) | 1969-01-16 |
| FR1575382A (en) | 1969-07-18 |
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| GB1228869A (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414A | Case decided by the comptroller ** specification amended (sect. 14/1949) | ||
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |