Iridium and bromide in silver halide grain finish

Details Iridium and bromide in silver halide grain finish Iridium and bromide in silver halide grain finish

1994-01-13

1995-02-21

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430604, 430605, G03C 1015

Patent

active

053914740

ABSTRACT:
The invention provides a process for incorporating iridium into silver chloride or silver chlorobromide emulsions containing 90% or more chloride which comprises addition of an iridium salt along with or followed by the addition of bromide to the emulsion, after completion of the precipitation stage of emulsion manufacture. The invention also encompasses the formed emulsions and photographic elements comprising the emulsions.

REFERENCES:
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patent: 4173483 (1979-11-01), Habu et al.
patent: 4693965 (1987-09-01), Ihama et al.
patent: 4786588 (1988-11-01), Ogawa
patent: 4902611 (1990-02-01), Leubner et al.
patent: 4997751 (1991-03-01), Kim
patent: 5070008 (1991-12-01), Maekawa et al.
patent: 5153110 (1992-10-01), Kawai et al.
patent: 5166044 (1992-11-01), Asami
Hidemaru Sakai and Shigeju Baba, J. Soc. Phot. of Japan, "Influence of Irridium Salts on the Silver Halide Emulsions (I) Effect on Reciprocity Law Failure of the Emulsions", vol. 31, Issue 1, 1969, pp. 34-40.

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