Eastman-Kodak Company

Ralph W Jones, Jr

Myra T Olm

Rajesh Vinodrai Mehta

Dirk J Hasberg

Joe E Maskasky

Richard L Parton

Robert D Wilson

David A Stegman

Alfred P Marchetti

Raymond S Eachus

Francis J Evans

James R Buntaine

Gaile Antoinette Janusonis

Catherine C Wideman

Paul W Twombly

Process for the preparation of high bromide cubic grain emulsions

Process for the preparation of high bromide tabular grain emulsions

A film is disclosed for duplicating a silver image in a radiographic film. A single monodispersed fogged direct-positive emulsion layer is employed. To extend exposure latitude the emulsion layer contains micro-crystalline particles of a dye that competes with the fogged direct positive grains of the emulsion layer for absorption of exposing radiation and can be decolorized during photographic processing.

Film for duplicating silver images in radiographic films

A photographic emulsion is disclosed in which an infrared spectral sensitizing dye is adsorbed to the surface of silver bromide grains optionally containing iodide. The grains are formed in the presence of a hexacoordination complex of iron and at least three cyanide ligands to counteract dye desensitization.

Silver brom(oiod)ide emulsions of increased sensitivity in the near

A photographic silver halide emulsion is disclosed in which the face centered cubic crystal lattice structure of the grains contain at adjacent cation sites metal ions chosen from group VIII, periods 5 and 6. The metal ions are placed at adjacent cation lattice sites by sensitizing the grains with oligomers each containing at least two of the group VIII metal ions.

Photographic emulsions sensitized by the introduction of oligomers

A infrared absorbing filter dye that also imparts a cool image tone after processing is disclosed for use in photographic elements. The dye has the formula: ##STR1## where Z and Z' each independently represents the atoms necessary to complete a substituted or unsubstituted: thiazole nucleus, selenazole nucleus, indole nucleus, imidazole nucleus, or quinoline nucleus, R.sub.1 and R.sub.2 each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, Z' represents the atoms necessary to complete a substituted or unsubstituted heterocyclic ring, Q represents the atoms necessary to complete a substituted or unsubstituted carbocyclic ring, m and n each independently represents 0 or 1, and X represents a counterion as needed to balance the charge of the molecule.

Photographic silver halide element containing infrared filter dyes

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

Silver halide photographic emulsions are disclosed comprised of radiation sensitive silver halide grains of a cubic crystal lattice structure comprised of trisoctahedral crystal faces.

Emulsions and photographic elements containing silver halide grains

Growing community of inventors

Hilton, NY, United States of America

Ralph W Jones, Jr