Radiation imagery chemistry: process – composition – or product th – Including exposure step or specified pre-exposure step...
Patent
1977-09-12
1979-12-04
Kelley, Mary F.
Radiation imagery chemistry: process, composition, or product th
Including exposure step or specified pre-exposure step...
430966, 430603, 430605, 430569, G03C 504, G03C 524, G03C 106, G03C 128
Patent
active
041770714
ABSTRACT:
Radiographic silver halide emulsions are provided comprising silver halide grains the average silver halide grain diameter of which is at least 250 nm and which consist substantially of silver bromide dispersed in a hydrophilic colloid binder e.g. gelatin wherein the silver halide grains have high primitive surface sensitivity for direct exposure to penetrating radiation and are substantially regular in shape and wherein the ratio of hydrophilic colloid to silver halide is at most about 1.0. These emulsions have high sensitivity for direct exposure to penetrating radiation and are themselves substantially insensitive to formation of pressure marks upon rapid processing.
REFERENCES:
patent: 3545971 (1970-12-01), Barnes et al.
patent: 3772031 (1973-11-01), Berry et al.
patent: 3912933 (1975-10-01), Van Stappen
patent: 4040833 (1977-08-01), Hinata et al.
patent: 4057429 (1977-11-01), De Brabandere et al.
patent: 4067739 (1978-01-01), Lewis
Neblette's Handbook of Photography and Reprography, pp. 550-561.
Borginon Hendrik A.
De Brabandere Luc A.
Pattyn Herman A.
Pollet Robert J.
Agfa-Gevaert N.V.
Breiner A. W.
Kelley Mary F.
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