Method of preparing {111} tabular silver chloro(bromo)iodide cry

Details Method of preparing {111} tabular silver chloro(bromo)iodide cry Method of preparing {111} tabular silver chloro(bromo)iodide cry

1998-03-16

2000-02-29

Baxter, Janet

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, G03C 1035, G03C 107

Patent

active

060307625

ABSTRACT:
A method has been found of preparing a silver halide emulsion comprising silver chlorobromoiodide or silver chloroiodide tabular grains with at least 75 mole % of chloride and from 0.1 up to 3 mole % of iodide, based on silver, further having {111} crystal faces, an average aspect ratio of at least 2:1, with at least 50%, more preferable at least 75% and still more preferable more than 90% of the total projected area of all grains being provided by said tabular grains and with a variation coefficient on sphere equivalent diameter (SED) of said grains being lower than 0.30, more preferably lower than 0.25 and most preferable from 0.05 up to at most 0.15, said method comprising the steps of

REFERENCES:
patent: H001323 (1994-06-01), Ohezeki et al.
patent: 5176991 (1993-01-01), Jones et al.
patent: 5183732 (1993-02-01), Maskasky
patent: 5525460 (1996-06-01), Maruyama et al.

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