GB685303A - Improvements in or relating to photographic light-sensitive emulsions - Google Patents

Improvements in or relating to photographic light-sensitive emulsions

Info

Publication number
GB685303A
GB685303A GB3105049A GB3105049A GB685303A GB 685303 A GB685303 A GB 685303A GB 3105049 A GB3105049 A GB 3105049A GB 3105049 A GB3105049 A GB 3105049A GB 685303 A GB685303 A GB 685303A
Authority
GB
United Kingdom
Prior art keywords
emulsion
gelatin
aqueous
paper
coated
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
GB3105049A
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.)
EN Mason and Sons Ltd
Original Assignee
EN Mason and Sons 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
Application filed by EN Mason and Sons Ltd filed Critical EN Mason and Sons Ltd
Priority to GB3105049A priority Critical patent/GB685303A/en
Publication of GB685303A publication Critical patent/GB685303A/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
    • G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
    • G03C1/053—Polymers obtained by reactions involving only carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Abstract

685,303. Photographic emulsion layers. MASON & SONS, Ltd., E. N., and BAKER, T. T. Feb. 6.1951 [Dec. 2, 1949], No. 31050/49. Class 98 (ii). A silver halide emulsion is prepared by emulsifying a silver halide in a weak aqueous solution of gelatin, and mixing the emulsion with an aqueous emulsion of a polymerized acrylic or methacrylic ester. Silver halide emulsion may be prepared using 1 or 2 per cent by weight gelatin solution containing 1 part of gelatin to 10 parts of silver nitrate, and the emulsion, after ripening or digestion, is mixed with mechanical stirring with an aqueous emulsion of the polymerized acrylic or methacrylic ester, e.g. polymethyl methacrylate, having a pH of about 7, preferably in such pro. portions that the synthetic resin is present in 10 to 15 times the amount of gelatin. The emulsion may be a print-out or developing-out emulsion. The viscosity of the emulsion increases on standing. Paper may be coated with the emulsion at room temperature, and drying effected rapidly by heat. In an example, an aqueous solution of silver nitrate and citric acid is slowly poured with stirring into an aqueous solution of gelatin, ammonium chloride, and sodium potassium tartrate, an aqueous emulsion of polymethyl or other methacrylate is added, the whole allowed to stand, and the emulsion coated on baryta or other paper and dried by heat. Paper may also be coated with a washed or unwashed developing-out silver chloride or bromide emulsion mixed with a methacrylate emulsion, the final pH of the emulsion being about 7. Specification 674,752 is referred to. Reference has been directed by the Comptroller to Specification 674,752.
GB3105049A 1949-12-02 1949-12-02 Improvements in or relating to photographic light-sensitive emulsions Expired GB685303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3105049A GB685303A (en) 1949-12-02 1949-12-02 Improvements in or relating to photographic light-sensitive emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3105049A GB685303A (en) 1949-12-02 1949-12-02 Improvements in or relating to photographic light-sensitive emulsions

Publications (1)

Publication Number Publication Date
GB685303A true GB685303A (en) 1952-12-31

Family

ID=10317210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3105049A Expired GB685303A (en) 1949-12-02 1949-12-02 Improvements in or relating to photographic light-sensitive emulsions

Country Status (1)

Country Link
GB (1) GB685303A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533793A (en) * 1967-03-02 1970-10-13 Eastman Kodak Co Process for preparing photographic elements
EP0185243A3 (en) * 1984-12-17 1988-10-05 Minnesota Mining And Manufacturing Company Photosensitive silver halide material for obtaining half-tone black-and-white images and method for half-tone high-contrast reproduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533793A (en) * 1967-03-02 1970-10-13 Eastman Kodak Co Process for preparing photographic elements
EP0185243A3 (en) * 1984-12-17 1988-10-05 Minnesota Mining And Manufacturing Company Photosensitive silver halide material for obtaining half-tone black-and-white images and method for half-tone high-contrast reproduction

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