Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1992-08-27
1993-12-21
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430567, 430614, 430615, 430588, 430592, G03C 1005, G03C 1015, G03C 1035
Patent
active
052720527
ABSTRACT:
A process is disclosed of preparing an emulsion for photographic use comprised of silver halide grains and a gelatino-peptizer dispersing medium in which morphologically unstable tabular grains having {111} major faces account for greater than 50 percent of total grain projected area and contain at least 50 mole percent chloride, based on silver. The emulsion additionally contains at least one 2-hydroaminoazine adsorbed to and morphologically stabilizing the tabular grains. A silver salt is epitaxially deposited epitaxially at one or more corners of the tabular grains. Protonation releases 2-hydroaminoazine from the tabular grain surfaces into the dispersing medium. Released 2-hydroaminoazine is replaced on the tabular grain surfaces by adsorption of a photographically useful compound selected from among those that contain at least one stabilizing chalcogen atom or at least one 5-iodobenzoxazolium nucleus or a photographically useful cationic benzimidazolium dye, thereby concurrently morphologically stabilizing the tabular grains and enhancing their photographic utility, and the released 2-hydroaminoazine is removed from the dispersing medium.
REFERENCES:
patent: 2131038 (1938-09-01), Brooker
patent: 4063951 (1977-12-01), Bogg
patent: 4386156 (1983-05-01), Mignot
patent: 4399215 (1983-08-01), Wey
patent: 4400463 (1983-08-01), Maskasky
patent: 4414306 (1983-11-01), Wey et al.
patent: 4435501 (1984-03-01), Maskasky
patent: 4657846 (1987-04-01), Kokubo et al.
patent: 4713323 (1987-12-01), Maskasky
patent: 4783398 (1988-11-01), Takada et al.
patent: 4786588 (1988-11-01), Ogawa et al.
patent: 4791053 (1988-12-01), Ogawa et al.
patent: 4804621 (1989-02-01), Tufano et al.
patent: 4820624 (1989-04-01), Hasebe et al.
patent: 4865962 (1989-09-01), Hasebe et al.
patent: 4940657 (1990-07-01), Tanaka et al.
patent: 4942120 (1990-07-01), King et al.
patent: 4952491 (1990-08-01), Nishikawa et al.
patent: 4983508 (1991-01-01), Ishiguro et al.
patent: 5035992 (1991-07-01), Houle et al.
patent: 5176991 (1993-01-01), Jones et al.
patent: 5176992 (1993-01-01), Maskasky et al.
patent: 5176992 (1993-01-01), Maskasky et al.
patent: 5178997 (1993-01-01), Maskasky
patent: 5178998 (1993-01-01), Maskasky et al.
patent: 5183732 (1993-02-01), Maskasky
patent: 5185239 (1993-02-01), Maskasky
patent: 5217858 (1993-06-01), Maskasky
patent: 5221602 (1993-06-01), Maskasky
Research Disclosure vol. 308, Dec. 1989, Item 308119.
Symposium: Torino 1963, Photographic Science, Edited by C. Semerano and U. Mazzucato, Focal Press 52-55.
Sugimoto and Miyake, "Mechanism of Halide Conversion Process of Colloidal AgCl Microcrystals by Br.sup.- Ions", Parts I and II, Journal of Colloid and Interface Science, vol. 140, No. Dec. 1990, pp. 335-361.
Bowers Jr. Charles L.
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
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