Eastman-kodak Company

Samuel J Ciurca

Robert G Cameron

Edward J Walsh

Jack C Chang

Albert T Brault

James R King

Carl F Kohrt

Peter Anthony Marr

Grant M Haist

David A Pupo

Thiazolyl couplers, coupler compositions and photographic elements

Ballasted 1-hydroxy-2-naphthamide couplers which are N-substituted with a thiazolyl group that is in turn substituted with a phenyl group are disclosed as well as compositions and photographic elements containing these couplers in coupler solvents. The coupler solvent particles are comprised of a combination of a coupler solvent and the coupler capable of permitting the formation of a microcrystalline dye. Surprisingly these microcrystalline dyes exhibit a broadened absorption characteristic in the 750 to 850 nm region of the spectrum. Dye images having such absorption characteristics are particularly suited to forming integral infrared absorbing sound tracks in photographic elements, such as motion picture projection films.

Thiazolyl coupler compositions and photographic elements suited to

Photographic elements for providing black-and-white images contain a silver halide emulsion having associated therewith a non-diffusible resorcinol coupler and a color developing agent or a precursor of a color developing agent. The elements can be processed by simple alkaline activation. Since image density is derived at least in part from the resorcinol coupler, lower silver halide coverages can be employed or the silver can be recovered, or both.

Black-and-white photographic elements and processes

Disclosed herein are aqueous and nonaqueous photographic bleaching solutions and radiation sensitive elements comprising a thiyl bleaching agent precursor having the formula ##STR1## wherein Z comprises the nonmetallic atoms necessary to complete a 5 to 7 member heterocyclic ring; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected from the group consisting of alkyl, cycloalkyl, aralkyl, aryl or R.sup.2 and R.sup.3 or R.sup.4 and R.sup.5 can be taken together with the carbon atom of the ring to which they are attached to form a cycloalkyl or cycloalkenyl group; and R.sup.1 is independently selected from the group consisting of hydrogen, oxo and a complexing ligand for silver (I) ion wherein the Ksp of the complexed product of the ligand and silver (I) ion is less than about 10.sup.-12 at 25.degree. C. The thiyl bleaching agents disclosed herein are capable of bleaching preformed or predeveloped metals such as silver in both aqueous and nonaqueous photographic materials. They do not adversely affect the photographic properties of radiation sensitive emulsions and can be thermally activated in a dry photothermographic process.

Thiyl bleaching agents for photographic processes

Stable nitroxyl radicals are useful as oxidants in photographic elements or film units.

Photographic elements containing nitroxyl radical oxidants

Heterocyclic N-oxides are useful as oxidants in photographic elements or film units.

Growing community of inventors

Rochester, NY, United States of America

Samuel J Ciurca