Abstract: A dye-forming photothermographic element comprises in a binder, in reactive association,(a) photographic silver halide,(b) an image forming combination comprising(i) a reducible organic silver salt with(ii) a reducing agent selected from the group consisting of p-phenylenediamine, p-aminophenol, sulfonamidophenol, sulfonamidoaniline and hydrazone developing agents, and(c) a coupler which is capable of forming an image dye by reaction with the oxidized form of the reducing agent.In such a photothermographic element improvements are provided wherein the coupler has attached to the carbon atom at the coupling position either (A) a group --S--Dye, wherein Dye represents an image dye, or a blocked or shifted form thereof, and any necessary linking group, or (B) a moiety --S--Z, wherein Z represents atoms linking the sulfur atom to another position in the coupler. The exposed dye-forming photothermographic element is capable of forming a dye image by merely heating the element.

Abstract: Granularity of silver halide photographic materials is reduced by employing a coupler which yields a dye of such mobility that controlled image smearing occurs.

Abstract: Cyan azo dye-providing compounds have the formula: ##STR1## wherein: R.sup.1 is selected from the group consisting of aryl, alkyl or NR.sup.11 R.sup.12 wherein R.sup.11 is alkyl or aryl and R.sup.12 is alkyl, or R.sup.11 and R.sup.12, taken together with the nitrogen atom to which they are attached, is a heterocyclic group;X is --CO-- or --SO.sub.2 --;R.sup.3 is --COOH or --CAR and is attached in the meta or para position to X in the benzene ring;R is alkyl; ##STR2## can be taken together with R and the nitrogen atom to which it is attached to form a heterocyclic ring unsubstituted or substituted with a carboxy group; andCAR is a carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye, with the proviso that the compound contains at least one CAR group and, excepting when R and R.sup.2 form a heterocyclic group and X is --SO.sub.2 --, must contain at least one carboxy group.

Abstract: Cyan azo dye-providing compounds have the formula: ##STR1## wherein: R.sup.1 is selected from the group consisting of aryl, alkyl or NR.sup.11 R.sup.12 wherein R.sup.11 is alkyl or aryl and R.sup.12 is alkyl, or R.sup.11 and R.sup.12, taken together with the nitrogen atom to which they are attached, is a heterocyclic group;X is --CO-- or --SO.sub.2 --;R.sup.3 is --COOH or --CAR and is attached in the meta or para position to X in the benzene ring;R is alkyl; ##STR2## or can be taken together with R and the nitrogen atom to which it is attached to form a heterocyclic ring unsubstituted or substituted with a carboxy group; andCAR is a carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye, with the proviso that the compound contains at least one CAR group and, excepting when R and R.sup.2 form a heterocyclic group and X is --SO.sub.2 --, must contain at least one carboxy group.

Abstract: Certain azo compounds are useful as spectral sensitizing dyes in photographic silver halide materials, and particularly in photothermographic materials. These azo compounds comprise moieties capable of forming substantially insoluble silver salts thereby substantially improving sensitization of silver halides.

Abstract: Certain azo compounds are useful as spectral sensitizing dyes in photographic silver halide materials, and particularly in photothermographic materials. These azo compounds comprise moieties capable of forming substantially insoluble silver salts thereby substantially improving sensitization of silver halides.

Abstract: Light-sensitive compositions including a polymer of the type that is reactable with an azide sensitizer when exposed to light and a sensitizing amount of a naphthalene sensitizer having ortho diazo and oxo substituents at the 1,2 or the 2,1 positions of the naphthalene nucleus and further having an azidosulfonyl substituent group of which the sulfonyl moiety is bonded directly to the naphthalene nucleus at the 4 or the 5-position, are advantageous in the preparation of positive-working photolithographic materials. IN the azidosulfonyl group, the azido moiety can be linked directly or indirectly to the sulfonyl moiety, such as in the compounds 2-diazo-1,2-dihydro-1-oxo-5(4'-azidophenoxysulfonyl)naphthalene and 5-azidosulfonyl-2-diazo-1,2-dihydro-1-oxonaphthalene. The light-sensitive compositions can be coated on support materials to prepare composite photographic elements having utility as photolithographic printing masters and photoresists for etching operations.