Method for obtaining a photographic material suitable for use in

Details Method for obtaining a photographic material suitable for use in Method for obtaining a photographic material suitable for use in

1995-03-29

1996-05-21

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430605, 430608, 430612, 430204, G03C 109, G03C 806

Patent

active

055188753

ABSTRACT:
The present invention provides a method for obtaining a photographic material by coating on a support at least one layer comprising at least one photosensitive silver halide emulsion wherein the silver halide crystals contain silver chloride for at least 60 mole %, silver bromide in a range from 5 mole % to 40 mole % and silver iodide in a range from 0 mole % to 1 mole %, characterized in that a water soluble iridium compound is added between the end of the physical ripening and the end of the chemical ripening to said silver halide emulsion at a pH between 4 and 6.5, at a pCl between -0.3 and 1 and at a ratio by weight of gelatin to silver halide, expressed as equivalent amount of silver nitrate between 0.05 and 0.5.

REFERENCES:
patent: 5059508 (1991-10-01), Vaes et al.
patent: 5391474 (1995-02-01), Haefner et al.

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