High bromide (111) tabular grain emulsions precipitated in a nov

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430603, 430605, 430637, G03C 1005

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056934599

ABSTRACT:
A radiation-sensitive emulsion is disclosed comprised of a dispersing medium and a coprecipitated grain population having a coefficient of variation of less than 30 percent. The coprecipitated grain population consists essentially of tabular grains containing greater than 50 mole percent bromide, based on silver, and having {111} major faces. The dispersing medium is comprised of (a) a cationic starch peptizer and (b) a polyalkylene oxide block copolymer surfactant.

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Mees The Theory of the Photographic Process, Revised Ed., Macmillan, 1951, pp. 48-49.
James The Theory of the Photographic Process, 4th Ed., Macmillan, 1977, p. 51.
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Research Disclosure, vol. 308, Dec. 1989, Item 308119, IX.

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