Control of surface iodide using post precipitation KC1 treatment

Details Control of surface iodide using post precipitation KC1 treatment Control of surface iodide using post precipitation KC1 treatment

1990-12-06

1993-12-28

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 1005

Patent

active

052738736

ABSTRACT:
The invention is generally accomplished by at the end of precipitation of a bromoiodide silver halide emulsion, adding a soluble chloride salt to the precipitation prior to emulsion washing. The chloride salt may be added in an amount between 0.05 and about 5 moles per liter of the precipitation. Further, it is preferred that after adding the chloride, the precipitation be held for at least about 10 minutes after the chloride salt addition prior to the washing to remove salts. Further, it is preferred that the salt removal, holding after chloride addition, and precipitation be carried out at about the same temperature.

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R. Matejec, H. Frieser, Die Grundlagen der photographischen Prozesse mit Silberhalogeniden, Bd. 1, 1968, Chapter 1.3.2.4., pp. 440-442.
Research Disclosure, vol. 308, No. 119, Photographic Silver Halide Emulsions, Preparations, Addenda, Processing and Systems, Dec. 1989, pp. 993-995.
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