Process of producing silver halide photographic emulsions

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

Reexamination Certificate

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C430S569000, C430S449000

Reexamination Certificate

active

06878511

ABSTRACT:
A process of producing a silver halide photographic emulsion containing tabular silver halide grains having an aspect ratio of 5 or more, which comprises using silver halide fine grains as prepared by the following method in at least one of a nucleation step and a growth step of the production of silver halide emulsion, the method comprising mixing at least a silver salt aqueous solution and a halide aqueous solution to prepare silver halide fine grains, wherein one of the silver salt aqueous solution and the halide aqueous solution is introduced as a jet flow into a mixer; a region where the jet flow slows down is provided within the mixer; and the other solution is introduced into the jet flow before the velocity of the jet flow has become {fraction (1/10)} of the velocity at the time when the jet flow comes into the slowing-down region.

REFERENCES:
patent: 6645713 (2003-11-01), Saito
patent: 2000-338620 (2000-12-01), None
patent: 2001-290231 (2001-10-01), None

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