GB558099A - Improvements relating to photographic materials - Google Patents

Improvements relating to photographic materials

Info

Publication number
GB558099A
GB558099A GB530042A GB530042A GB558099A GB 558099 A GB558099 A GB 558099A GB 530042 A GB530042 A GB 530042A GB 530042 A GB530042 A GB 530042A GB 558099 A GB558099 A GB 558099A
Authority
GB
United Kingdom
Prior art keywords
emulsion
slow
mixed
added
dye
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
GB530042A
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.)
Kodak Ltd
Original Assignee
Kodak Ltd
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
Priority to BE470425D priority Critical patent/BE470425A/xx
Application filed by Kodak Ltd filed Critical Kodak Ltd
Priority to GB6575/43A priority patent/GB558452A/en
Priority to GB530042A priority patent/GB558099A/en
Priority to GB5346/42A priority patent/GB559201A/en
Priority to US473390A priority patent/US2367508A/en
Priority to US482195A priority patent/US2411096A/en
Publication of GB558099A publication Critical patent/GB558099A/en
Priority to GB9598/44A priority patent/GB588099A/en
Priority to FR950298D priority patent/FR950298A/en
Priority to FR944075D priority patent/FR944075A/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
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/102—Organic substances dyes other than methine dyes

Abstract

558,099. Photographic sensitive materials. KODAK, Ltd., and KNOTT, E. B. April 21, 1942, No. 5300. [Class 98 (ii)] The tendency for a sensitizing dye to wander from a dye-sensitized silver salt emulsion to a neighbouring silver salt emulsion is reduced by adding to the dye-sensitized emulsion (before bringing it into association with the neighbouring emulsion) a sensitive silver salt emulsion which is slower and of finer grain than either, The emulsion may be mixed or coated in successive layers without an intervening layer, and both may be dye-sensitized. The slow emulsion may be a Lippmann type emulsion and may have a threshold speed of not more than a fifth of that of the slower of the other emulsions. All three may be silver bromide, or all three silver chloride, emulsions. The finer the grain of the slow emulsion, the less the quantity that is usually necessary. The slow emulsion may also be added to the neighbouring emulsion. In Example 1, to a contrasty gelatino silver bromide emulsion is added an acetone solution of 5-(2-ethyl-1-(2)- benzoxazolylidene - ethylidene) - 3 - heptyl - 1 - phenyl - 2 - thiohydantoin and then a slow gelatino silver bromide Lippmann type emulsion. The product is mixed with a soft gelatino silver bromide emulsion to which Lippmann type emulsion has also been added, and the mixed emulsion coated. In Example 2, to a contrasty gelatino silver chloride emulsion sensitized with the dye of Example 1 is added a slow fine-grain gelatino silver chloride emulsion, and the product is then mixed with a soft gelatino silver chloride emulsion to which also has been added the slow finegrain emulsion, and the mixed emulsion is coated. In Example 3, the procedure is as in Example 1, but the two emulsions are applied to a support in adjacent layers. The use of mixed emulsions and superimposed emulsion layers in colour photography and multi-contrast material is referred to. Specifications 524,552, 532,098, 540,451, 540,464, and 544,134 are referred to.
GB530042A 1942-04-21 1942-04-21 Improvements relating to photographic materials Expired GB558099A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE470425D BE470425A (en) 1942-04-21
GB6575/43A GB558452A (en) 1942-04-21 1942-04-21 Improvements relating to photographic materials
GB530042A GB558099A (en) 1942-04-21 1942-04-21 Improvements relating to photographic materials
GB5346/42A GB559201A (en) 1942-04-21 1942-04-21 Improvements relating to photographic emulsions
US473390A US2367508A (en) 1942-04-21 1943-01-23 Retardation of diffusion of sensitizing dyes
US482195A US2411096A (en) 1942-04-21 1943-04-07 Photographic materials
GB9598/44A GB588099A (en) 1942-04-21 1944-05-18
FR950298D FR950298A (en) 1942-04-21 1946-09-20 Improvements to photographic products
FR944075D FR944075A (en) 1942-04-21 1946-10-25 Improvements to photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB530042A GB558099A (en) 1942-04-21 1942-04-21 Improvements relating to photographic materials

Publications (1)

Publication Number Publication Date
GB558099A true GB558099A (en) 1943-12-21

Family

ID=9793501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB530042A Expired GB558099A (en) 1942-04-21 1942-04-21 Improvements relating to photographic materials

Country Status (1)

Country Link
GB (1) GB558099A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152907A (en) * 1959-11-12 1964-10-13 Eastman Kodak Co Method for controlling speed and contrast of photographic emulsions
US3178282A (en) * 1959-01-12 1965-04-13 Eastman Kodak Co Photographic elements containing surface image and fogged internal image silver halide grains

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178282A (en) * 1959-01-12 1965-04-13 Eastman Kodak Co Photographic elements containing surface image and fogged internal image silver halide grains
US3152907A (en) * 1959-11-12 1964-10-13 Eastman Kodak Co Method for controlling speed and contrast of photographic emulsions

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