Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1987-02-17
1987-12-15
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430434, 430495, 430496, 430564, 430569, G03C 102, G03C 526
Patent
active
047133201
ABSTRACT:
The present invention is directed to a process of precipitating for use in photography a thin, tabular grain silver bromide or bromoiodide emulsion employing a gelatino-peptizer comprised of less than 30 micromoles of methionine per gram and to an emulsion produced by this process. A variety of advantages can be realized, including a wider range of permissible bromide ion concentrations during precipitation, thinner and/or larger diameter tabular grains, a reduced rod population, and novel tabular grain forms.
REFERENCES:
patent: 2890215 (1959-06-01), Corben
patent: 4434226 (1984-02-01), Wilgus et al.
patent: 4520098 (1985-05-01), Dickerson
Mol, "Investigations of Oxidized Gelatins", 2nd Photographic Gelatin Symposium, sponsored by the Royal Photographic Society, Oxford, U.K. Sep. 6, 1985.
Research Disclosure, vol. 176, Dec. 1978, Item 17643.
Research Disclosure, vol. 225, Jan. 1987, Item 22534.
J. Pouradier and Annette Rondeau, "On the Methionine Sulphoxide of Gelatin", The Journal of Photographic Science, vol. 16, 1968, pp. 68 and 69.
Y. Matsuo "Degradation of Methionine by Hydrogen Peroxide", Nature, vol. 171, p. 1021, 1953.
J. Beersman, "Proceedings of the International Colloquium Held at Liege 1959", Scientific Photography, Macmillan, pp. 321 and 322.
W. D. Kelly, "Purification and Chemical Sensitization of Photographic Gelatin," The Journal of Photographic Science, vol. 6, pp. 16-22, 1958.
Eastman Kodak Company
Kittle John E.
Shah Mukund J.
Thomas Carl O.
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