GB724001A - Photographic light sensitive silver halide emulsions and process using the same - Google Patents

Photographic light sensitive silver halide emulsions and process using the same

Info

Publication number
GB724001A
GB724001A GB984452A GB984452A GB724001A GB 724001 A GB724001 A GB 724001A GB 984452 A GB984452 A GB 984452A GB 984452 A GB984452 A GB 984452A GB 724001 A GB724001 A GB 724001A
Authority
GB
United Kingdom
Prior art keywords
layers
silver
images
silver halide
bromide
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
GB984452A
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.)
Agfa Gevaert NV
Original Assignee
Agfa AG
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 Agfa AG filed Critical Agfa AG
Publication of GB724001A publication Critical patent/GB724001A/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
    • G03C1/49—Print-out and photodevelopable emulsions
    • 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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/02—Photosensitive materials characterised by the image-forming section
    • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals

Abstract

724,001. Photographic emulsion and process. AGFA AKT.-GES. FUR PHOTOFABRIKATION. April 18, 1952 [April 30, 1951], No. 9844/52. Class 98 (2). A solution of a water-soluble bromide and a water-soluble thiocyanate is treated with a solution containing a water-soluble silver salt in molar excess over the bromide so as to precipitate silver bromide and silver thiocyanate. In an example, such precipitation is effected in the presence of gelatin and the emulsion is digested, treated with more gelatin, digested again and then hydrazo-thio-carbonamide as halogen accepter is added before coating. Layers of the emulsion produce latent or directly visible images on short exposure to light containing a high proportion of ultra-violet rays. Latent images produced by very short exposure become visible on subsequent exposure to incandescent light or daylight and fade later but may be intensified and preserved by development, particularly with developers containing a silver halide solvent, such as potassium thiocyanate. The directly visible images retain some contrast after prolonged subsequent exposure but may be developed similarly. Fixing may be effected. Transfer images may be obtained by development of the layers in the presence of a silver halide solvent whilst the layers are in contact with reception layers containing development nuclei such as colloidal silver, and in this process the images of the exposed layers are intensified. Specifications 614,155 and 654,630 are referred to.
GB984452A 1951-04-30 1952-04-18 Photographic light sensitive silver halide emulsions and process using the same Expired GB724001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1951F0006152 DE899586C (en) 1951-04-30 1951-04-30 Process for making permanent light records on layers of silver salt

Publications (1)

Publication Number Publication Date
GB724001A true GB724001A (en) 1955-02-16

Family

ID=7084883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB984452A Expired GB724001A (en) 1951-04-30 1952-04-18 Photographic light sensitive silver halide emulsions and process using the same

Country Status (5)

Country Link
BE (1) BE511060A (en)
CH (1) CH303687A (en)
DE (1) DE899586C (en)
FR (1) FR1066101A (en)
GB (1) GB724001A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155507A (en) * 1961-12-08 1964-11-03 Du Pont Photographic processes
US3261682A (en) * 1962-09-29 1966-07-19 Siemens Ag Zirconium alloys containing cerium and yttrium
US3507656A (en) * 1966-01-10 1970-04-21 Du Pont Radiation-sensitive emulsions
US4332887A (en) * 1980-10-06 1982-06-01 Polaroid Corporation Method for preparing photosensitive silver halide emulsions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB888543A (en) * 1959-10-16 1962-01-31 Kodak Ltd Improvements in processes of photographic reproduction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155507A (en) * 1961-12-08 1964-11-03 Du Pont Photographic processes
US3261682A (en) * 1962-09-29 1966-07-19 Siemens Ag Zirconium alloys containing cerium and yttrium
US3507656A (en) * 1966-01-10 1970-04-21 Du Pont Radiation-sensitive emulsions
US4332887A (en) * 1980-10-06 1982-06-01 Polaroid Corporation Method for preparing photosensitive silver halide emulsions

Also Published As

Publication number Publication date
FR1066101A (en) 1954-06-02
DE899586C (en) 1953-12-14
BE511060A (en)
CH303687A (en) 1954-12-15

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