Emulsions with tabular grain major faces formed by regions of di

Details Emulsions with tabular grain major faces formed by regions of di Emulsions with tabular grain major faces formed by regions of di

1995-02-27

1996-02-20

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

G03C 1035

Patent

active

054928010

ABSTRACT:
Radiation-sensitive emulsions are disclosed comprised of high bromide tabular grains having {111} major faces wherein a portion of the {111} major faces is formed by a central region containing at least 7 mole percent iodide and an annular band extends outwardly from the central region forming a second portion of the {111} major faces and contains less than half the iodide of the central region. The emulsions combine the advantages of both high and low surface iodide tabular grain emulsions.

REFERENCES:
patent: 4439520 (1984-03-01), Kofron et al.
patent: 4504570 (1985-03-01), Evans et al.
patent: 4665012 (1987-05-01), Sugimoto et al.
patent: 4934037 (1990-07-01), Saitou
patent: 5250403 (1993-10-01), Antoniades et al.
Bando et al, "Photographic Silver Halide Emulsion Containing Double Structure Grains", J. of Imaging Science, vol. 29, No. 5, Sep./Oct. 1985, pp. 193-195.

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