Eastman-kodak Company

Heidi E Dankosh

Dilip K Chatterjee

Seshadri Jagannathan

Thomas N Blanton

Kathleen R Gisser

Donald R Diehl

Margaret Jones Helber

John D Mee

Thomas R Dobles

A photosensitive material includes silver iodide produced by decomposing a solid electrolyte of the formula MA,g,having an ionic conductivity of >0.001 ohm,cm,in an organic solvent, where M is a monovalent cation. The photosensitive material further includes a sensitizing agent selected from the group consisting of residual MAg,I,, MAg,I,, and mixtures of residual MAg,I,, and MAg,I,.

Silver iodide-containing photosensitive material and photothermographic element formed therefrom

This invention comprises a photothermographic element comprising a support bearing an imaging layer comprising:

Photothermographic elements

Improved photothermographic elements are spectrally sensitized with cyanine dyes that provide efficient sensitization together with excellent keeping stability and low dye stain. The photothermographic elements comprise a photosensitive silver halide, an organic silver salt, such as silver behenate, and a reducing agent. The cyanine dye utilized as a spectral sensitizer for the silver halide is an anionic cyanine dye comprising two thiazole nuclei each of which is substituted with an N-sulfoalkyl group wherein at least one of the thiazole nuclei is a 5,6-dihalobenzothiazole nucleus.

Spectrally sensitized photothermographic elements

Improved photothermographic elements are spectrally sensitized with a combination of cyanine dyes that provides efficient sensitization together with excellent keeping stability and low dye stain. The photothermographic elements comprise a photosensitive silver halide, an organic silver salt, such as silver behenate, and a reducing agent. The dye combination utilized as a spectral sensitizer for the silver halide is a combination of a first cyanine dye containing two thiazole nuclei and a second cyanine dye containing a thiazole nucleus and an oxazole nucleus.

Photothermographic elements containing a combination of spectral

A photographic element having a silver halide emulsion sensitized by dye of the formula I: ##STR1## wherein: R.sup.1 represents a substituted or unsubstituted aromatic or heteroaromatic group, a substituted or unsubstituted alkyl or H; R.sup.2 represents a substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, or H; E.sup.1 represents an electron withdrawing group; Z represents the non-metallic atoms required to complete a substituted or unsubstituted ring system containing at least one 5- or 6-membered heterocyclic nucleus; L.sup.1, L.sup.2, L.sup.5 and L.sup.6 independently represent a substituted or unsubstituted methine; m may be 0, 1, 2 or 3; n may be 0 or 1.

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Rochester, NY, United States of America

Heidi E Dankosh