Eastman-kodak Company

Lee J Fleckenstein

John Figueras

Robert T Belly

Ronald E Leone

Drake M Michno

Donald L Kerr

Harold I Machonkin

William N Washburn

Jerome J Looker

Robert E Ross

Michael E Campbell

Photographic elements and emulsions are described which are capable of providing high contrast images. The elements and emulsions comprise negative working silver halide and contrast enhancing arylhydrazide nucleating agents. A process for utilization of the elements and emulsions is also described.

High contrast photographic element and emulsion and process for their use

Compounds and reagents containing the compounds are disclosed for detecting oxidase positive organisms. The compounds have the structure

Reagents for detecting oxidase positive microorganisms

A photographic recording material and emulsion are described which are capable of providing high contrast images. The recording material and emulsion comprises negative working silver halide and contrast enhancing arylhydrazide nucleating agents. A process for utilization of the elements and emulsions is also described.

High contrast photographic recording material and emulsion and process

Photographic elements, diffusion transfer assemblages and processes are described which employ a nondiffusible, redox, dye-releasing compound comprising a ballasted, sulfonamidophenol or sulfonamidonaphthol compound having a dye moiety attached thereto through the sulfonamido group of the compound, the sulfonamido group being located in a position which is conjugated with respect to the position of the hydroxy group of the compound, and wherein

Photographic products and processes employing substituted

A dye-releasing mechanism is described which employs a nondiffusible dye-releasing compound having a dye or dye-precursor moiety attached thereto through a sulfonamido cleavage linkage so that a diffusible sulfonamide dye or dye-precursor will be released upon oxidation and subsequent alkaline hydrolysis of the compound.

Sulfonamido dye releasing compounds in photographic elements

Color photographic elements, compositions, diffusion transfer film units and processes are described which employ a nondiffusible p-sulfonamidoaniline or p-sulfonamidophenol which is preferably alkali-cleavable upon oxidation to release a diffusible color-providing moiety.

PHOTOGRAPHIC DIFFUSION TRANSFER FILMS, PROCESSES AND COMPOSITIONS WITH

Color photographic elements, diffusion transfer film units and processes are described which employ nondiffusible o-sulfonamidonaphthols which are alkali-cleavable upon oxidation to release a diffusible color-providing moiety.

O-sulfonamidonaphthol diffusible dye image providing compounds

Nondiffusible p-sulfonamidophenols which are alkalicleavable upon oxidation to release a diffusible color-providing moiety from the benzene nucleus having the formula: ##SPC1## Wherein Col is a dye or dye precursor moiety, and Ballast is an organic ballasting radical which renders the compound nondiffusible in a photographic element during development with an alkaline processing composition.

Growing community of inventors

Rochester, NY, United States of America

Lee J Fleckenstein