Eastman-Kodak Company

Gaile Antoinette Janusonis

Roger L Lok

Myra T Olm

David Erdtmann

Woodrow G McDugle, Jr

Ralph W Jones, Jr

Raymond S Eachus

Richard D Lucitte

James R Buntaine

Francis R Hilton, Jr

Room-light handleable direct silver halide emulsions exhibit a broadened Dmin window when certain nitro-substituted aryl- or heteroaryl-containing imidazoles are included. These imidazoles act as excellent rereversal and Dmin suppressants. Photographic elements are prepared from these emulsions that can be handled in room-light if desired.

Room-light handleable direct reversal silver halide emulsions containing

Room light handleable direct reversal silver bromide emulsions, with up to 70 mole percent chloride, have a broad Dmin window when from 1.times.10.sup.-6 to 1.times.10.sup.-4 mole per silver mole of a polybromo coordination complex of iridium is incorporated in the silver halide grains. The emulsions are stabilized against deterioration on keeping with mercapto compounds.

Direct reversal emulsions

A photographic silver halide emulsion is disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure and internally containing rhenium ions.

Internally doped silver halide emulsions

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Rochester, NY, United States of America

Gaile Antoinette Janusonis