Silver halide photographic emulsion

Details Silver halide photographic emulsion Silver halide photographic emulsion

2005-05-17

2005-05-17

Letscher, Geraldine (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

C430S569000, C430S502000

Reexamination Certificate

active

06893811

ABSTRACT:
A silver halide photographic emulsion comprising epitaxial junction type tabular grains. The epitaxial junction type tabular grains each satisfying the following requirements (i) to (iv) occupy 100 to 50% (grain numerical ratio) of all the grains contained in the silver halide photographic emulsion:(i) host tabular grain is a tabular grain of silver iodobromide or silver iodochlorobromide having {111} faces as main planes and two parallel twin planes;(ii) at least one silver halide epitaxial portion is formed, per grain, only on a corner portion of the host tabular grain;(iii) a portion of an external surface of the silver halide epitaxial portion has a face parallel to the main plane of the host tabular grain; and(iv) a portion of an external surface of the silver halide epitaxial portion has a {100} face.

REFERENCES:
patent: 6593072 (2003-07-01), Royster, Jr.
patent: 6797459 (2004-09-01), Shirata
patent: 20010031434 (2001-10-01), Ihama

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