Plug-flow process for the nucleation of silver halide crystals

Details Plug-flow process for the nucleation of silver halide crystals Plug-flow process for the nucleation of silver halide crystals

1990-10-29

1992-04-14

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 1015

Patent

active

051047861

ABSTRACT:
The invention is generally accomplished by providing nucleation of silver halide crystals or grain without backmixing or exposure to previously nucleated grains. Generally this is accomplished by injecting a solution of silver nitrate into a solution of sodium bromide and peptizer as it is moving in pipe in a type of flow which does not provide back mixing and moves in generally plug flow. The plug flow is carried out until nucleation is complete and then the nucleated grains are transferred to a mixing container where they are ripened, grown, and subjected to the normal treatments, such as sensitization, applied to the silver halide to be used photgraphically.

REFERENCES:
patent: 3897935 (1975-08-01), Forster et al.
patent: 4147551 (1979-04-01), Finnicum et al.
patent: 4171224 (1979-10-01), Verhille et al.
patent: 4722886 (1988-02-01), Nottorf
patent: 4775617 (1988-10-01), Goda

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