GB561875A - Improvements in or relating to photographic materials - Google Patents

Improvements in or relating to photographic materials

Info

Publication number
GB561875A
GB561875A GB17200/42A GB1720042A GB561875A GB 561875 A GB561875 A GB 561875A GB 17200/42 A GB17200/42 A GB 17200/42A GB 1720042 A GB1720042 A GB 1720042A GB 561875 A GB561875 A GB 561875A
Authority
GB
United Kingdom
Prior art keywords
mercapto
emulsion
tetrazoles
phenyl
naphthyl
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
Application number
GB17200/42A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB17200/42A priority Critical patent/GB561875A/en
Priority to US510040A priority patent/US2403927A/en
Publication of GB561875A publication Critical patent/GB561875A/en
Priority to FR916071D priority patent/FR916071A/en
Priority to DEP42077A priority patent/DE973160C/en
Expired legal-status Critical Current

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
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
    • 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
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
    • G03C1/346—Organic derivatives of bivalent sulfur, selenium or tellurium
    • 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

Abstract

The quality of images developed in silver halide emulsions is improved by treating the emulsion at a stage not later than its development with a small quantity of a 5-mercaptotetrazole. The 5-mercapto-tetrazole may be incorporated in the emulsion, the developer, or in subcoat, supercoat, or backing layers, or may be applied in solution to the emulsion before development. The use of the compound reduces chemical and age fog, increases the maximum obtainable image density, and improves the image colour. The preferred compounds are the 1-aryl-, 1-substituted-aryl-, 1 - aralkyl -, and 1 - cycloalkyl - 5 - mercapto - tetrazoles, although the unsubstituted and 1-alkyl-5-mercapto-tetrazoles may be used. In some cases the compounds increase the effective speed of the emulsion. The 1-hydrocarbon substituent may be methyl, ethyl, higher alkyl groups, allyl, phenyl, naphthyl, benzyl, or cyclohexyl, and such groups may be substituted, e.g. by halogen atoms or amino groups. One part of the compound may be added to from 50,000 to 1,000,000 parts of emulsion or to from 3,000 to 100,000 parts of developer solution. Examples are given of the addition of 1 - phenyl - 5 - mercapto - tetrazole to (a) a gelatino-silver-iodobromide emulsion, (b) a developer, and (c) a gelatine supercoat over a silver chloride emulsion coated on a paper support; of the addition of 1-a -naphthyl-, 1 - p - diethylaminophenyl -, 1 - o - methoxyphenyl-, 1 - p - chlorphenyl -, 1 - benzyl -, 1 - cyclohexyl -, 1 - methyl -, and 1 - ethyl - 5 - mercapto-tetrazoles to a silver iodobromide emulsion, and of the addition of 1-methyl-, 1 - a - naphthyl -, and 1 - cyclohexyl - 5 - mercapto-tetrazoles to developers used for prints later hot-glazed. The 5-mercapto-tetrazoles are prepared by condensing an azide (e.g. sodium azide with an organic isothiocyanate or, in the case of the 1-aryl compounds, by treating an aryl thiosemicarbazide with nitrous acid. 1-Phenyl-5-mercapto-tetrazole is prepared by adding sodium nitrite to a mixture of 4-phenyl-thio-semicarbazide, concentrated hydrochloric acid, and water cooled in ice. 1-Ethyl-, 1-benzyl-, 1-cyclohexyl, 1-a -naphthyl-1, p-chlorphenyl-, 1-p-methoxy-phenyl, and 1-p-diethylaminophenyl-5-mercaptotetrazoles are prepared from the corresponding isothiocyanates.
GB17200/42A 1942-12-03 1942-12-03 Improvements in or relating to photographic materials Expired GB561875A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB17200/42A GB561875A (en) 1942-12-03 1942-12-03 Improvements in or relating to photographic materials
US510040A US2403927A (en) 1942-12-03 1943-11-12 Improvers for photographic emulsions
FR916071D FR916071A (en) 1942-12-03 1945-10-19 photographic emulsions and their manufacturing process
DEP42077A DE973160C (en) 1942-12-03 1949-05-08 Photographic material with a silver halide coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17200/42A GB561875A (en) 1942-12-03 1942-12-03 Improvements in or relating to photographic materials

Publications (1)

Publication Number Publication Date
GB561875A true GB561875A (en) 1944-06-08

Family

ID=10090995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17200/42A Expired GB561875A (en) 1942-12-03 1942-12-03 Improvements in or relating to photographic materials

Country Status (4)

Country Link
US (1) US2403927A (en)
DE (1) DE973160C (en)
FR (1) FR916071A (en)
GB (1) GB561875A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699393A (en) * 1950-04-15 1955-01-11 Agfa Ag Fur Photofabrikation Photographic process for the direct production of positive images
US2726955A (en) * 1952-12-19 1955-12-13 Du Pont Silver halide emulsions containing antiplumming and anti-bronzing agents

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465149A (en) * 1946-04-25 1949-03-22 Gen Aniline & Film Corp Tetrazolyl disulfides as stabilizing agents for silver-halide emulsions
US2453087A (en) * 1946-11-07 1948-11-02 Gen Aniline & Film Corp Photographic developers containing tetrazolyl disulfides as antifogging agents
US2614925A (en) * 1949-12-20 1952-10-21 Eastman Kodak Co Mercapto azoles in developer for mixed grain photographic process
US2697040A (en) * 1952-01-11 1954-12-14 Du Pont Photographic composition containing antiplumming and antibronzing agents
US2952539A (en) * 1958-10-23 1960-09-13 Gen Aniline & Film Corp Photographic emulsions and developers stabilized with purine compounds
BE596987A (en) * 1959-11-12
NL268155A (en) * 1960-08-22
NL268156A (en) * 1960-08-22
BE620828A (en) * 1961-08-01
US3161515A (en) * 1962-12-18 1964-12-15 Gen Aniline & Film Corp Stabilized light-sensitive silver halide emulsions
US3335009A (en) * 1964-04-20 1967-08-08 Eastman Kodak Co Antifoggant combination for processing evaporated silver halide layers
US3902903A (en) * 1966-03-18 1975-09-02 Keuffel & Esser Co Carbonyl bisulfite adducts as fixers for halogen liberating free radical systems
GB1230395A (en) * 1967-07-08 1971-04-28
US3502467A (en) * 1967-12-12 1970-03-24 Eastman Kodak Co High temperature processing in dyedeveloper diffusion transfer systems
GB1266639A (en) * 1969-10-17 1972-03-15
JPS536636B1 (en) * 1969-10-27 1978-03-09
DE2758720A1 (en) * 1977-12-29 1979-07-19 Agfa Gevaert Ag PHOTOGRAPHIC MATERIAL WITH STABILIZERS
US4137079A (en) * 1978-04-03 1979-01-30 Eastman Kodak Company Antifoggants in heat developable photographic materials
JPS57116340A (en) * 1981-01-13 1982-07-20 Fuji Photo Film Co Ltd Method for developing silver halide photosensitive material
EP0080631B1 (en) * 1981-11-13 1985-06-26 Fuji Photo Film Co., Ltd. Silver halide photographic light-sensitive materials
JPS59188641A (en) 1983-04-11 1984-10-26 Fuji Photo Film Co Ltd Silver halide photographic emulsion
US4672043A (en) * 1985-02-19 1987-06-09 Eastman Kodak Company Stabilization of developed electrophoregrams
EP0239363B1 (en) 1986-03-25 1992-10-28 Konica Corporation Light-sensitive silver halide photographic material feasible for high speed processing
JPH0727210B2 (en) * 1987-02-13 1995-03-29 三菱製紙株式会社 Lithographic printing plate
DE3739766A1 (en) * 1987-11-24 1989-06-08 Agfa Gevaert Ag GRADATION VARIABLE SW PAPER
CN1695083A (en) * 2002-11-20 2005-11-09 柯尼卡美能达影像株式会社 Silver halide photosensitive material and image forming method therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE390036A (en) * 1928-01-31
CH186867A (en) * 1934-07-19 1936-10-15 Ig Farbenindustrie Ag Photosensitive gelatin emulsion and process for its preparation.
BE437216A (en) * 1938-12-05
BE437217A (en) * 1938-12-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699393A (en) * 1950-04-15 1955-01-11 Agfa Ag Fur Photofabrikation Photographic process for the direct production of positive images
US2726955A (en) * 1952-12-19 1955-12-13 Du Pont Silver halide emulsions containing antiplumming and anti-bronzing agents

Also Published As

Publication number Publication date
FR916071A (en) 1946-11-26
DE973160C (en) 1959-12-10
US2403927A (en) 1946-07-16

Similar Documents

Publication Publication Date Title
GB561875A (en) Improvements in or relating to photographic materials
US2193015A (en) Developer containing sulphonamide groups
US2588982A (en) Direct positive photographs using hydrazine in the emulsion
US3220839A (en) Photographic emulsions containing isothiourea derivatives
US2108602A (en) Photographic color-forming compounds
US2563785A (en) Direct positive photographs from hydrazine-containing developers
US3141771A (en) Aldehyde scavengers for photographic silver halide developers
JPS5474729A (en) Direct positive silver halide photosensitive material
US3128182A (en) Silver halide solvent containing developers and process
JPS60123837A (en) Photographic silver halide emulsion
US2725290A (en) Development of multi-layer color films with developers containing mercapto azoles
US2304953A (en) Photographic developer
GB560253A (en) Improvements in the production of photographic silver images in blue-black tones using a methylol nitromethane
JPH04221949A (en) Infrared-ray sensitive halogenated silver material for photograph
GB705565A (en) Light sensitive diazo type layers
GB581772A (en) Improvements in photographic processes
JPH0322973B2 (en)
JPH02105142A (en) Direct positive silver halide photographic sensitive material
GB1501005A (en) Sensitive photothermographic material
US2295008A (en) Photographic color forming compound
US2133937A (en) Color photography
US3565620A (en) Photographic processing liquids and method of producing photographic images
US3468665A (en) Color photographic silver halide emulsion
US2507154A (en) Direct positive photographs using color developers
US2295009A (en) Photographic color forming compound