GB712374A - Improvements in photographic processes - Google Patents
Improvements in photographic processesInfo
- Publication number
- GB712374A GB712374A GB16262/52A GB1626252A GB712374A GB 712374 A GB712374 A GB 712374A GB 16262/52 A GB16262/52 A GB 16262/52A GB 1626252 A GB1626252 A GB 1626252A GB 712374 A GB712374 A GB 712374A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydroquinone
- image
- sodium
- direct positive
- phenylhydrazine
- 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
- 150000005208 1,4-dihydroxybenzenes Chemical class 0.000 abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 229940067157 phenylhydrazine Drugs 0.000 abstract 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 abstract 2
- QMJDEXCUIQJLGO-UHFFFAOYSA-N [4-(methylamino)phenyl] hydrogen sulfate Chemical compound CNC1=CC=C(OS(O)(=O)=O)C=C1 QMJDEXCUIQJLGO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract 2
- -1 alkali metal salts Chemical class 0.000 abstract 2
- 239000000839 emulsion Substances 0.000 abstract 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N 1,4-Benzenediol Natural products OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 abstract 1
- IKQCSJBQLWJEPU-UHFFFAOYSA-N 2,5-dihydroxybenzenesulfonic acid Chemical class OC1=CC=C(O)C(S(O)(=O)=O)=C1 IKQCSJBQLWJEPU-UHFFFAOYSA-N 0.000 abstract 1
- LRUDIIUSNGCQKF-UHFFFAOYSA-N 5-methyl-1H-benzotriazole Chemical compound C1=C(C)C=CC2=NNN=C21 LRUDIIUSNGCQKF-UHFFFAOYSA-N 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- SYOOJDWKARXQOG-UHFFFAOYSA-L disodium;3,6-dihydroxybenzene-1,2-disulfonate Chemical compound [Na+].[Na+].OC1=CC=C(O)C(S([O-])(=O)=O)=C1S([O-])(=O)=O SYOOJDWKARXQOG-UHFFFAOYSA-L 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- XBCIOBSQHJYVBQ-UHFFFAOYSA-N naphthalen-1-ylhydrazine Chemical compound C1=CC=C2C(NN)=CC=CC2=C1 XBCIOBSQHJYVBQ-UHFFFAOYSA-N 0.000 abstract 1
- HKOOXMFOFWEVGF-UHFFFAOYSA-N phenylhydrazine Chemical compound NNC1=CC=CC=C1 HKOOXMFOFWEVGF-UHFFFAOYSA-N 0.000 abstract 1
- VKDSBABHIXQFKH-UHFFFAOYSA-M potassium;4-hydroxy-3-sulfophenolate Chemical compound [K+].OC1=CC=C(O)C(S([O-])(=O)=O)=C1 VKDSBABHIXQFKH-UHFFFAOYSA-M 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 235000010265 sodium sulphite Nutrition 0.000 abstract 1
- KICVIQZBYBXLQD-UHFFFAOYSA-M sodium;2,5-dihydroxybenzenesulfonate Chemical compound [Na+].OC1=CC=C(O)C(S([O-])(=O)=O)=C1 KICVIQZBYBXLQD-UHFFFAOYSA-M 0.000 abstract 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 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)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
712,374. Direct positive photographic images. KODAK, Ltd. June 27, 1952 [June 27, 1951], No. 16262/52. Drawings to Specification, Class 98(2) A direct positive photographic image is produced by exposing to an object or image a sensitive silver salt emulsion layer of the type defined in Specification 645,877 and developing it to form a direct positive image according to any of the methods of Specifications 645,877, 702,162 and 712,355 in the presence of one or more sulphonated hydroquinones (including alkali metal salts thereof) and substantially in the absence of unsubstituted hydroquinone. The presence of one or more hydroquinone sulphonates during development enables the contrast of the direct positive image produced to be varied. An exposed internal latent image emulsion is developed in a solution containing an alkali metal salt of sulphonated hydroquinone, e.g. sodium or potassium hydroquinone monosulphonate or sodium hydroquinone disulphonate, N- methyl-p-aminophenol sulphate (variation of the concentration of this ingredient varies the contrast of the image), and a hydrazine as disclosed in Specifications 702,162 and 712,355, e.g. phenylhydrazine or #-methylsulphonamidoethylhydrazine hydrochloride, α-naphthylhydrazine, 1-naphthylhydrazine-7-sulphonic acid, or p-(#-methylsulphonamidoethyl)-phenylhydrazine. The pH should be 10 to 13, preferably 10.5 to 11.5. Two developing solutions specified contain p-(#-methylsulphonamidoethyl)-phenylhydrazine, N-methyl-p-aminophenol sulphate, sodium hydroquinone monosulphonate, sodium sulphite, 5-methylbenztriazole, and sodium hydroxide. Specifications 581,772, 581,773 and 635,841 also are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US233774A US2675318A (en) | 1951-06-27 | 1951-06-27 | Hydroquinone monosulfonate in direct positive photographic developers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB712374A true GB712374A (en) | 1954-07-21 |
Family
ID=22878637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16262/52A Expired GB712374A (en) | 1951-06-27 | 1952-06-27 | Improvements in photographic processes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2675318A (en) |
| BE (1) | BE512294A (en) |
| FR (1) | FR1078936A (en) |
| GB (1) | GB712374A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1047492A (en) * | 1963-01-10 | |||
| DE2406515C3 (en) * | 1974-02-12 | 1978-06-15 | Du Pont De Nemours (Deutschland) Gmbh, 4000 Duesseldorf | Photographic material for use in direct positives |
| EP0782041B1 (en) | 1995-12-27 | 1999-11-17 | Fuji Photo Film Co., Ltd. | Silver halide photographic light-sensitive material |
| EP0782042B1 (en) | 1995-12-27 | 1999-12-01 | Fuji Photo Film Co., Ltd. | Hydrazine compound and silver halide photographic photosensitive material comprising the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2572903A (en) * | 1944-06-22 | 1951-10-30 | Gen Aniline & Film Corp | Photographic developer containing thallium salts |
| US2458376A (en) * | 1946-03-14 | 1949-01-04 | Eastman Kodak Co | Photographic developer antioxidants |
| NL72136C (en) * | 1947-05-22 | |||
| US2497875A (en) * | 1947-10-17 | 1950-02-21 | Eastman Kodak Co | Direct positive photographs using aerial fogging developer |
| BE502879A (en) * | 1950-04-29 | |||
| BE510220A (en) * | 1951-03-28 |
-
0
- BE BE512294D patent/BE512294A/xx unknown
-
1951
- 1951-06-27 US US233774A patent/US2675318A/en not_active Expired - Lifetime
-
1952
- 1952-06-23 FR FR1078936D patent/FR1078936A/en not_active Expired
- 1952-06-27 GB GB16262/52A patent/GB712374A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1078936A (en) | 1954-11-24 |
| US2675318A (en) | 1954-04-13 |
| BE512294A (en) |
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