Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1990-12-05
1993-03-23
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430570, 430583, 430584, 430585, 430593, 430600, 430613, 430627, 430642, G03C 1015
Patent
active
051963000
ABSTRACT:
A method of preparing a superfine grain emulsion with a grain size of 0.05 .mu.m or less is provided, which includes mixing aqueous solutions of a water-soluble silver salt and a water-soluble halide with vigorous stirring inside a closed mixing device furnished with an agitator, where the solutions are fed into the device simultaneously and continuously, in the presence of at least one of a high molecular compound and a substance capable of adsorbing to silver halide, each of which has a physical retardance value of at least 40 as determined by PAGI method, and immediately expelling the newly-formed grains from the mixing device. Another method includes mixing the aqueous solutions in a mixing device as described above, immediately expelling the newly-formed grains from the device, and mixing the expelled grains with at least one of the above-described high molecular compound and substance. The silver halide photographic materials utilizing the superfine grain emulsion are suitable for holographic image-recording and image-recording with electron beam, lasers, and so on.
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Aida Shunichi
Urabe Shigeharu
Baxter Janet C.
Bowers Jr. Charles L.
Fuji Photo Film Co. , Ltd.
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