Method of preparing (100) tabular grains rich in silver bromide

Details Method of preparing (100) tabular grains rich in silver bromide Method of preparing (100) tabular grains rich in silver bromide

1999-03-15

2000-06-27

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430637, 430642, 430966, G03C 1015, G03C 1005, G03C 1047, G03C 1053

Patent

active

060805366

ABSTRACT:
A method has been described of preparing a photosensitive emulsion comprising tabular silver halide grains rich in silver bromide, having {100} major faces and an aspect ratio more than 1.5, wherein at least 50% of the projected area of all grains is provided by said {100} tabular grains, said method comprising the step of running in a reaction vessel an aqueous silver salt solution and an aqueous alkali halide solution rich in alkali bromide, characterized in that before starting running said reaction vessel comprises in an aqueous solution of gelatin an amount of amino-modified polyvinyl alcohol as an aqueous soluble polymer.

REFERENCES:
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patent: 4386156 (1983-05-01), Mignot
patent: 5215879 (1993-06-01), Suzuki et al.
patent: 5455154 (1995-10-01), Helling et al.
patent: 5565314 (1996-10-01), Nakatsu et al.
patent: 5726006 (1998-03-01), Gourlaouen et al.
patent: 5879873 (1999-03-01), Gourlaouen et al.

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