Pre-precipitation spectral sensitizing dye addition process

Details Pre-precipitation spectral sensitizing dye addition process Pre-precipitation spectral sensitizing dye addition process

1978-09-22

1980-01-15

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430581, G03C 110, G03C 102

Patent

active

041837568

ABSTRACT:
A method of preparing a spectrally sensitized radiation-sensitive silver halide emulsion is disclosed in which a methine spectral sensitizing dye is added to a reaction vessel prior to the concurrent introduction of aqueous halide and silver salt solutions. The silver halide grains concurrently formed and spectrally sensitized in this manner exhibit relatively high minus blue speeds.

REFERENCES:
patent: 2735766 (1956-02-01), Hill
patent: 3628960 (1971-12-01), Philippaerts et al.
patent: 3883355 (1975-05-01), Walworth
patent: 4060419 (1977-11-01), Gerber et al.
Reinders, "Studies of Photohalide Crystals", Kolloid-Zeitschrift, vol. 9, pp. 10-14, 1911.

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