Deposition sensitized emulsions and processes for their preparat

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

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430569, G03C 1035

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active

054686016

ABSTRACT:
A process is disclosed for the precipitation of a silver halide emulsion containing host grains having {100} crystal faces that are sensitized by the deposition of protrusions at the intersections of the {100} crystal faces. Protrusion growth is achieved by undertaking final silver introduction in the presence of a benzothiazolium site director containing a 5-position electron withdrawing ring substituent adsorbed to the {100} crystal faces of the grains being grown.

REFERENCES:
patent: 4435501 (1984-03-01), Maskasky
patent: 4463087 (1984-07-01), Maskasky
patent: 4471050 (1984-09-01), Maskasky
patent: 5275930 (1994-01-01), Maskasky
Shiozawa, "Bull. Soc. Photogr. Sci. Technol. Japan", No. 22, 14-20 (1972).

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