GB1031902A - Improvements in silver halide photography - Google Patents
Improvements in silver halide photographyInfo
- Publication number
- GB1031902A GB1031902A GB46344/62A GB4634462A GB1031902A GB 1031902 A GB1031902 A GB 1031902A GB 46344/62 A GB46344/62 A GB 46344/62A GB 4634462 A GB4634462 A GB 4634462A GB 1031902 A GB1031902 A GB 1031902A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver halide
- mercapto
- phenyl
- silver
- compound
- 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
- -1 silver halide Chemical class 0.000 title abstract 12
- 229910052709 silver Inorganic materials 0.000 title abstract 11
- 239000004332 silver Substances 0.000 title abstract 11
- 239000000839 emulsion Substances 0.000 abstract 4
- CYCKHTAVNBPQDB-UHFFFAOYSA-N 4-phenyl-3H-thiazole-2-thione Chemical compound S1C(S)=NC(C=2C=CC=CC=2)=C1 CYCKHTAVNBPQDB-UHFFFAOYSA-N 0.000 abstract 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 abstract 3
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 abstract 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 150000002894 organic compounds Chemical class 0.000 abstract 2
- 229940065287 selenium compound Drugs 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- ZZEYCGJAYIHIAZ-UHFFFAOYSA-N 4-methyl-1-phenylpyrazolidin-3-one Chemical compound N1C(=O)C(C)CN1C1=CC=CC=C1 ZZEYCGJAYIHIAZ-UHFFFAOYSA-N 0.000 abstract 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 abstract 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 239000004133 Sodium thiosulphate Substances 0.000 abstract 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 238000003287 bathing Methods 0.000 abstract 1
- WDODWFPDZYSKIA-UHFFFAOYSA-N benzeneselenol Chemical compound [SeH]C1=CC=CC=C1 WDODWFPDZYSKIA-UHFFFAOYSA-N 0.000 abstract 1
- 125000002837 carbocyclic group Chemical group 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 abstract 1
- CBEQRNSPHCCXSH-UHFFFAOYSA-N iodine monobromide Chemical compound IBr CBEQRNSPHCCXSH-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract 1
- ZNNZYHKDIALBAK-UHFFFAOYSA-M potassium thiocyanate Chemical compound [K+].[S-]C#N ZNNZYHKDIALBAK-UHFFFAOYSA-M 0.000 abstract 1
- 229940116357 potassium thiocyanate Drugs 0.000 abstract 1
- 229910052711 selenium Inorganic materials 0.000 abstract 1
- 239000011669 selenium Substances 0.000 abstract 1
- 150000003343 selenium compounds Chemical class 0.000 abstract 1
- IYKVLICPFCEZOF-UHFFFAOYSA-N selenourea Chemical compound NC(N)=[Se] IYKVLICPFCEZOF-UHFFFAOYSA-N 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 abstract 1
- 235000019345 sodium thiosulphate Nutrition 0.000 abstract 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 abstract 1
- NBOMNTLFRHMDEZ-UHFFFAOYSA-N thiosalicylic acid Chemical compound OC(=O)C1=CC=CC=C1S NBOMNTLFRHMDEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229940103494 thiosalicylic acid Drugs 0.000 abstract 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/58—Benzoxazoles; Hydrogenated benzoxazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C391/00—Compounds containing selenium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/68—Benzothiazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D293/00—Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms
- C07D293/10—Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms condensed with carbocyclic rings or ring systems
- C07D293/12—Selenazoles; Hydrogenated selenazoles
-
- 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
- G03C1/492—Photosoluble emulsions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Thiazole And Isothizaole Compounds (AREA)
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15813261A | 1961-12-08 | 1961-12-08 | |
| US236417A US3155515A (en) | 1961-12-08 | 1962-11-08 | Photographic products |
| US236418A US3155516A (en) | 1961-12-08 | 1962-11-08 | Photographic products |
| US236420A US3155507A (en) | 1961-12-08 | 1962-11-08 | Photographic processes |
| US236412A US3155514A (en) | 1961-12-08 | 1962-11-08 | Photographic compositions and elements |
| US317824A US3155519A (en) | 1961-12-08 | 1963-10-21 | Photographic compositions, layers and elements |
| NL6408533A NL6408533A (enrdf_load_html_response) | 1961-12-08 | 1964-07-24 | |
| US388919A US3418124A (en) | 1961-12-08 | 1964-08-11 | High contrast direct positive by using active cations in silver halide solvent |
| US390460A US3384485A (en) | 1961-12-08 | 1964-08-18 | Silver halide emulsions photosolubilized with optical sensitizing dyes and silver mercaptides |
| US403661A US3284206A (en) | 1961-12-08 | 1964-10-13 | Image yielding layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1031902A true GB1031902A (en) | 1966-06-02 |
Family
ID=27580572
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB46344/62A Expired GB1031902A (en) | 1961-12-08 | 1962-12-07 | Improvements in silver halide photography |
| GB46345/62A Expired GB1031903A (en) | 1961-12-08 | 1962-12-07 | Photographic silver halide materials and processes |
| GB34231/65A Expired GB1111226A (en) | 1961-12-08 | 1965-08-10 | Improvements relating to the production of images |
| GB43289/65A Expired GB1124772A (en) | 1961-12-08 | 1965-10-12 | Improvements in silver halide photography |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB46345/62A Expired GB1031903A (en) | 1961-12-08 | 1962-12-07 | Photographic silver halide materials and processes |
| GB34231/65A Expired GB1111226A (en) | 1961-12-08 | 1965-08-10 | Improvements relating to the production of images |
| GB43289/65A Expired GB1124772A (en) | 1961-12-08 | 1965-10-12 | Improvements in silver halide photography |
Country Status (5)
| Country | Link |
|---|---|
| US (8) | US3155514A (enrdf_load_html_response) |
| BE (1) | BE670823A (enrdf_load_html_response) |
| DE (5) | DE1226877B (enrdf_load_html_response) |
| FR (1) | FR89467E (enrdf_load_html_response) |
| GB (4) | GB1031902A (enrdf_load_html_response) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR89467E (enrdf_load_html_response) * | 1961-12-08 | |||
| US3379529A (en) * | 1963-02-28 | 1968-04-23 | Eastman Kodak Co | Photographic inhibitor-releasing developers |
| US3368898A (en) * | 1963-10-17 | 1968-02-13 | Gen Aniline & Film Corp | Autopositive film and paper and emulsions therefor |
| DE1281842B (de) * | 1964-06-22 | 1968-10-31 | Du Pont | Fotografisches Aufzeichnungsmaterial mit einer fotoloeslichen Schicht |
| US3341574A (en) * | 1964-09-18 | 1967-09-12 | Celanese Corp | Di-(neopentylglycol mononeoheptanoate)azelate |
| US3407067A (en) * | 1964-10-13 | 1968-10-22 | Du Pont | Photosolubilization with mercaptooxazoles |
| US3407068A (en) * | 1964-10-13 | 1968-10-22 | Du Pont | Photosolubilization |
| US3394005A (en) * | 1964-10-16 | 1968-07-23 | Du Pont | Increased development rate of photosoluble silver halide emulsions by the action of water-soluble iodide |
| US3377169A (en) * | 1965-03-30 | 1968-04-09 | Du Pont | Copper thallium and lead halide and pseudohalides photosoluble crystals |
| US3458318A (en) * | 1965-08-02 | 1969-07-29 | Eastman Kodak Co | Supersensitized silver halide emulsions |
| US3451819A (en) * | 1965-08-09 | 1969-06-24 | Du Pont | Photosoluble silver halide emulsion made spontaneously developable with amine boranes |
| US3464822A (en) * | 1965-09-13 | 1969-09-02 | Du Pont | Process for making electrically conductive images |
| GB1178800A (en) * | 1966-03-01 | 1970-01-21 | Minnesota Mining & Mfg | Improvements in or relating to Copying Materials |
| US3486895A (en) * | 1966-04-29 | 1969-12-30 | Du Pont | Process for obtaining artistic effects in photosoluble direct positive silver halide emulsions |
| US3495983A (en) * | 1967-06-23 | 1970-02-17 | Du Pont | Photosolubilization process using phenols as dmax maintainers |
| US3628956A (en) * | 1967-12-08 | 1971-12-21 | Du Pont | Process for preparing direct positive images by photosolubilization |
| US3862352A (en) * | 1968-04-16 | 1975-01-21 | Itek Corp | Photographically prepared electrical circuits wherein the photosensitive material is a photoconductor |
| US3647439A (en) * | 1968-10-01 | 1972-03-07 | Eastman Kodak Co | Photographic element, composition and process |
| US3649289A (en) * | 1968-10-21 | 1972-03-14 | Eastman Kodak Co | Photographic materials |
| US3653899A (en) * | 1968-11-12 | 1972-04-04 | Eastman Kodak Co | Photographic materials and processes |
| US3640717A (en) * | 1969-06-05 | 1972-02-08 | Itek Corp | Photographic reversal process employing organic mercaptan compounds |
| US3652279A (en) * | 1969-07-18 | 1972-03-28 | Du Pont | Nitrogen-containing dmax maintainers for use in photosoluble emulsions |
| US4014699A (en) * | 1973-05-17 | 1977-03-29 | Ciba-Geigy Ag | Preparation for the processing of photographic materials |
| GB1548395A (en) * | 1975-05-29 | 1979-07-11 | Eastman Kodak Co | Photographic materials |
| GB1580212A (en) * | 1976-03-29 | 1980-11-26 | Agfa Gevaert | Antifogging and/or stabilizing compounds for silver halide photography |
| JPS53134430A (en) * | 1977-04-27 | 1978-11-24 | Mitsubishi Paper Mills Ltd | Silver halide photosensitive materials for multiilayer color photograph |
| DE2931690A1 (de) * | 1979-08-04 | 1981-02-19 | Agfa Gevaert Ag | Photographische emulsion, verfahren zur herstellung sowie photographische materialien |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE388620A (enrdf_load_html_response) * | 1926-05-21 | |||
| DE548323C (de) * | 1929-02-25 | 1932-04-09 | Kodak Akt Ges | Verfahren zum Stabilisieren einer Silberhalogenemulsion |
| US2025876A (en) * | 1931-04-11 | 1935-12-31 | Du Pont | Preparation of aryl-amines |
| US2131038A (en) * | 1932-05-26 | 1938-09-27 | Eastman Kodak Co | Photographic emulsion containing alkyl quaternary salts of thiazoles and the like asantifoggants |
| GB477628A (en) * | 1936-08-14 | 1938-01-04 | Albert Steigmann | Method of preventing yellow stain in photographs |
| US2214446A (en) * | 1938-05-10 | 1940-09-10 | Gen Aniline & Film Corp | Photographic development of silver halide layers |
| US2195150A (en) * | 1938-06-16 | 1940-03-26 | Ilford Ltd | Stabilization of photographic emulsions |
| US2520358A (en) * | 1948-09-04 | 1950-08-29 | Eastman Kodak Co | Heterocyclic bis acetones, thioacetones, and selenoacetones |
| US2710256A (en) * | 1951-04-25 | 1955-06-07 | Gen Aniline & Film Corp | Photographic print-out process |
| BE511060A (enrdf_load_html_response) * | 1951-04-30 | |||
| US2985661A (en) * | 1956-02-06 | 1961-05-23 | American Cyanamid Co | Preparation of 2(omicron-aminophenyl)-benzimidazole |
| BE555103A (enrdf_load_html_response) * | 1956-02-18 | |||
| BE557661A (enrdf_load_html_response) * | 1956-05-23 | |||
| US3038800A (en) * | 1957-12-19 | 1962-06-12 | Eastman Kodak Co | Photopolymerization of olefinicallyunsaturated monomers by silver halides |
| BE582161A (enrdf_load_html_response) * | 1958-08-29 | |||
| BE584391A (enrdf_load_html_response) * | 1958-11-07 | |||
| BE602317A (enrdf_load_html_response) * | 1960-04-11 | |||
| US3046130A (en) * | 1960-05-12 | 1962-07-24 | Gen Aniline & Film Corp | Photographic materials containing a chemical sensitizer |
| US3155518A (en) * | 1963-10-21 | 1964-11-03 | Du Pont | Silver halide compositions, layers and elements |
| FR89467E (enrdf_load_html_response) * | 1961-12-08 |
-
0
- FR FR89467D patent/FR89467E/fr active Active
-
1962
- 1962-11-08 US US236412A patent/US3155514A/en not_active Expired - Lifetime
- 1962-11-08 US US236417A patent/US3155515A/en not_active Expired - Lifetime
- 1962-11-08 US US236420A patent/US3155507A/en not_active Expired - Lifetime
- 1962-11-08 US US236418A patent/US3155516A/en not_active Expired - Lifetime
- 1962-12-07 GB GB46344/62A patent/GB1031902A/en not_active Expired
- 1962-12-07 DE DEP30723A patent/DE1226877B/de active Pending
- 1962-12-07 GB GB46345/62A patent/GB1031903A/en not_active Expired
- 1962-12-07 DE DEP30721A patent/DE1261397B/de active Pending
-
1963
- 1963-10-21 US US317824A patent/US3155519A/en not_active Expired - Lifetime
-
1964
- 1964-08-11 US US388919A patent/US3418124A/en not_active Expired - Lifetime
- 1964-08-18 US US390460A patent/US3384485A/en not_active Expired - Lifetime
- 1964-10-13 US US403661A patent/US3284206A/en not_active Expired - Lifetime
-
1965
- 1965-08-10 GB GB34231/65A patent/GB1111226A/en not_active Expired
- 1965-08-10 DE DEP37430A patent/DE1294186B/de active Pending
- 1965-08-18 DE DEP37479A patent/DE1293581B/de active Pending
- 1965-10-12 GB GB43289/65A patent/GB1124772A/en not_active Expired
- 1965-10-12 BE BE670823D patent/BE670823A/xx unknown
- 1965-10-13 DE DEP37856A patent/DE1293582B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3155514A (en) | 1964-11-03 |
| DE1293581B (de) | 1969-04-24 |
| US3418124A (en) | 1968-12-24 |
| FR89467E (enrdf_load_html_response) | |
| GB1124772A (en) | 1968-08-21 |
| US3155519A (en) | 1964-11-03 |
| DE1261397B (de) | 1968-02-15 |
| DE1294186B (de) | 1969-09-11 |
| US3155515A (en) | 1964-11-03 |
| BE670823A (enrdf_load_html_response) | 1966-04-12 |
| GB1111226A (en) | 1968-04-24 |
| DE1226877B (de) | 1966-10-13 |
| US3155507A (en) | 1964-11-03 |
| US3284206A (en) | 1966-11-08 |
| DE1293582B (de) | 1969-04-24 |
| US3155516A (en) | 1964-11-03 |
| US3384485A (en) | 1968-05-21 |
| GB1031903A (en) | 1966-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1031902A (en) | Improvements in silver halide photography | |
| GB1019222A (en) | Improvements in or relating to silver halide photographic materials | |
| GB1059782A (en) | Photographic silver halide emulsions and sensitive materials prepared therefrom | |
| GB1013439A (en) | Photographic processing webs | |
| GB1342522A (en) | Photosensitive heat-processable photographic materials | |
| US1962133A (en) | Photographic emulsion containing certain disulphides as antifoggants | |
| US3144336A (en) | Synergistic sensitization of photographic silver halide emulsions | |
| GB874080A (en) | Improved photographic light sensitive materials and processes | |
| US3769014A (en) | Beta-disulfone silver halide solubilizing agents | |
| US2139870A (en) | Photographic developers | |
| GB1076777A (en) | Photographic materials containing substances which form physically developable nuclei on exposure | |
| GB882964A (en) | Photographic reproduction process | |
| US3615521A (en) | Photographic compositions and processes-a | |
| GB931293A (en) | Improvements in photographic processes | |
| GB1066007A (en) | Improvements in or relating to gelatin-containing compositions | |
| GB583648A (en) | Improvements in photographic materials | |
| US3549364A (en) | Photographic processes and compositions | |
| US3287129A (en) | Light-sensitive photographic elements containing developing agent precursors | |
| GB1216243A (en) | Photographic processes and compositions | |
| US3565620A (en) | Photographic processing liquids and method of producing photographic images | |
| US2132169A (en) | Photographic desensitizing | |
| GB1013823A (en) | Viscous surface layer photographic processing compositions | |
| US3021212A (en) | Developers for photographic reversal processes | |
| US3300307A (en) | Photographic developer composition | |
| US3600181A (en) | Fog reduction of photographic silver halide emulsions by incorporation of a nitrocinnamic acid,or cinnamaldehyde in a contiguous layer |