Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1979-01-09
1980-12-30
Brown, Travis
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430567, G03C 102
Patent
active
042424453
ABSTRACT:
A method of preparing light-sensitive silver halide grains by the simultaneous addition of two or more aqueous solutions of inorganic salts in the presence of a protective colloid, in which the production of silver halide nuclei is brought to completion during the initial stages of grain formation and the concentrations of the aqueous solutions of inorganic salts reacting with one another are increased to such an extent that fresh nuclei of crystal grains are hardly produced during the period of grain growth. The process provides grains having a desired size, for which there exists a narrow size distribution, in a relatively short period of time and which avoids any abrupt increase in the flow rates of aqueous solutions of inorganic salts added to a reaction vessel during the final stage of grain growth.
REFERENCES:
patent: 3650757 (1972-03-01), Irie et al.
patent: 3672900 (1972-06-01), Kurz
Making & Coating Photographic Emulsions, Zelikman et al., Focal Press, N.Y., .COPYRGT.1964, pp. 82-87, 125, 130-141.
Brown Travis
Fuji Photo Film Co. , Ltd.
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