Abstract: A color-forming para-sulfonamidodiphenylamine dye precursor in a photographic material and process enables formation of a sulfonimide dye image by means of cross-oxidation without the need for a coupling reaction. The color-forming para-sulfonamidodiphenylamine dye precursor is useful in a photographic silver halide material for producing (i) a dye image, or (ii) a dye image and silver image. The exposed photographic material is processed to produce (a) a positive dye image, (b) a negative dye and negative silver image, (c) a negative dye image or (d) a positive dye image and a positive silver image.

Abstract: This invention relates to photographic products and processes employing silver halide solvent precursors of the formula ##STR1## wherein R.sup.1 is a monovalent organic radical; R.sup.2 is hydrogen or a monovalent organic radical; Z is a moiety that undergoes .beta.-elimination in aqueous alkaline solution and preferably is a moiety that undergoes .beta.-elimination in aqueous alkaline solution to release a photographically useful reagent; and n is an integer 3, 4 or 5.

Abstract: This invention relates to photographic products and processes employing silver halide solvent precursors of the formulae ##STR1## wherein R.sup.1 and R.sup.2, the same or different, each are hydrogen, alkyl, phenalkyl, phenyl or phenyl substituted with an electron-donating or electron-withdrawing group; R.sup.3 is alkyl, phenalkyl, phenyl or substituted phenyl; Z is --CN or --SO.sub.2 R.sup.4 wherein R.sup.4 is branched-chain alkyl, phenalkyl, phenyl or substituted phenyl; and n is an integer 3, 4 or 5.

Abstract: Mesoionic 1,2,4-triazolium-3-thiolates are silver halide stabilizers and fixing agents. They are useful in heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic materials, developed and stabilized silver images are produced by heating the materials. The mesoionic 1,2,4-triazolium-3-thiolates are also silver halide stabilizers and fixing agents in photographic silver halide processing compositions.

Abstract: A photographic material for diffusion transfer photography containing a quinonoid compound, which is capable in reduced state and under alkaline conditions of releasing a photographically useful group and corresponds to one of the following general formulae: ##STR1## wherein: each of (Nuox).sup.1 and (Nuox).sup.2 (same or different) represents an oxidized nucleophilic group,Z represents a bivalent atom or bivalent atomic group, which is electro-negative,Q together with the group Z represents a releasable photographically useful group,Y.sup.1 and Y.sup.2 together represent the necessary atoms to close a p-quinonoid ring substituted with (a) directly linked monovalent organic ring or ring system substituent(s) having aromatic character,Y.sup.3 represents the necessary atoms to close a o-quinonoid ring substituted with (a) directly linked monovalent organic ring or ring system substituent(s) having aromatic character, andeach of R.sup.1 and R.sup.

Abstract: A photographic element comprising a plurality of layers (e.g., three) of light sensitive emulsions arranged one on top of the other and based on a support, each of the emulsions comprising a coupler, a silver halide compound and a sensitization promoter which is transformed into a sensitizer by thermal, photo- or electro-sensitization. Novel processes of color photography and spectral sensitization of color photography emulsions are also disclosed. Furthermore, cameras having means to activate the sensitization promoters in the emulsions are provided.

Abstract: Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions, but are uniformly unblocked under conditions encountered during photographic processing.

Abstract: A photographic element containing a compound represented by formula (I) ##STR1## wherein G represents --OR.sup.1 or --NHR.sup.2, R.sup.1 represents hydrogen or a hydrolyzable moiety, R.sup.2 represents hydrogen or an alkyl group containing from 1 to 50 carbon atoms, Z represents a photographically useful group, A represents an atomic group forming an aromatic ring, Ball represents an organic immobilizing group on the aromatic ring, which cntains from 8 to 50 carbon atoms, m represents an integer of 1 or 2, X represents a divalent organic group, Nu represents a nucleophilic group, and n represents an integer of 1 or 2, and X with the nucleophilic group Nu is capable of forming a 5- to 12-membered ring by oxidation having an electrophilic center at the carbon atom substituted by the --NHSO.sub.2 Z group.

Abstract: Mesoionic 1,2,4-triazolium-3-thiolate silver halide stabilizer precursors are novel compounds useful in a heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic material, a developed and stabilized silver image is produced by heating the element. Mesoionic stabilizer precursors are also useful in photographic silver halide processing compositions.

Abstract: A stain retarding concentration of a phosphine antistain agent or phosphine antistain agent precursor in the undercoat layer of a photographic silver halide element comprising a support having thereon (a) a photographic silver halide gelatino emulsion layer, and (b) an undercoat layer between the emulsion layer and the support, provides reduced stain in the element upon exposure and processing. The photographic element preferably comprises a silver halide developing agent. The photographic element, after exposure, is preferably processed by means of an aqueous alkaline activator bath and then an aqueous thiosulfate stabilizer bath.

Abstract: The present invention is concerned with photographic products and processes employing certain pH-sensitive xanthene compounds as light-screening dyes, which compounds may be represented by the formulae ##STR1## wherein A and A', the same or different, are selected from ##STR2## each R is hydrogen or an electron-withdrawing group; each R.sup.1 is hydrogen or alkyl; each R.sup.2 is hydrogen, alkyl or an electron-withdrawing group; R.sup.3 is hydrogen or alkyl; R.sup.4 is alkyl; and n is 0 or 1 and which compounds in their colored, i.e., ring-opened form may be represented by the formulae ##STR3## wherein A, A', R.sup.3, R.sup.4 and n have the same meaning given above and Z is an anion.

Abstract: Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

Abstract: Substituted spirobi[2H-1-benzopyrans] particularly suitable for use as precursors to stable colored pyrylium salts are disclosed.

Abstract: Latexes suited for homogeneously incorporating compounds with a photographically useful group into photographic silver halide emulsion materials. The latex incorporates a copolymer comprising recurring units of a monomer with photographically useful group, and recurring units of surface active monomer, according to the general formula: ##STR1## wherein: R.sup.1 is hydrogen or methyl,n is 0 or 1 to 20,L is ##STR2## R.sup.2 is hydrogen or a hydrocarbon group, R.sup.3 is a monovalent chemical bond or a bivalent aliphatic hydrocarbon group or such group interrupted by the group --COO-- or --CONR--, andY is a sulpho, sulphato or phosphono group in acid or salt form, and at least one of the groups --(CH.sub.2).sub.n --, R.sup.2 and R.sup.3 is or comprises a hydrocarbon chain of at least 8 C-atoms.

Abstract: A photographic silver halide material is disclosed which contains a precursor of photographic chemicals.

Abstract: There are described novel compounds which include a silver halide developing function, a colorless ligand which is a radical of an iminodiacetic acid and a radical containing an onium group. The compounds are useful in photography as silver halide developing agents and also may be complexed with metals to form dye developers.

Abstract: Novel photographic imaging process and materials suitable therefor are provided, which can find their application in multi-color motion picture and simultaneous sound recording, in direct-positive image formation, in image-intensification processes, etc. A photographic silver image is formed in at least one hydrophilic colloid layer of a light-sensitive photographic material incorporating silver halide, by means of exposure and alkaline development steps, followed by bleaching of quantities of silver which are present in areas of said layer extraneous to those where imaging silver is required.

Abstract: A light-sensitive silver halide reproduction material of high gradation stability which contains a disulfide compound substituted by two heterocyclic radicals, and a thiazolidine compound.

Abstract: The stability of organic substrate materials having an absorption peak between 300 and 800 nm in wavelength can be improved by the presence of a compound represented by the following general formula (I), ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt atom; Cat represents a divalent cation or two monovalent cations; X represents S or a ##STR2## group where R.sup.1 and R.sup.2 each represents a CN, a COR.sup.3, a COOR.sup.4, a CONR.sup.5 R.sup.6, or a SO.sub.2 R.sup.7 group and R.sup.1 may combine with R.sup.2 to form a 5- or 6-membered ring; R.sup.3, R.sup.4 and R.sup.7 each represents an alkyl or an aryl group, R.sup.5 and R.sup.6 each represents a hydrogen atom, an alkyl or an aryl group, and n represents an integer of 1 or 2.

Abstract: A photosensitive recording material containing in admixture in a binder medium:(1) as imaging substance an organo-tellurium compound containing directly linked to a tellurium atom halogen and at least one organic substituent comprising at least one carbonyl group,(2) a photoreductant which upon exposure to activating radiation in the presence of a hydrogen-donating compound reduces said organo-tellurium compound to liberate metallic tellurium and halogen acid,(3) a hydrogen-donating compound from which hydrogen can be abstracted by the photo-exposed photoreductant, and(4) an organic reducing agent precursor, from which by the action of an acid a compound capable of reducing said organo-tellurium compound can be set free.

Abstract: An activator-stabilizer precursor which comprises a certain acylhydrazine which releases a base moiety upon being heated to a temperature above about 130.degree. C. provides improved heat developable and heat stabilizable photographic materials comprising, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of the described activator-stabilizer precursor having an acid portion and a base portion. The heat developable and heat stabilizable photographic element provides essential freedom from visual crystal formation in the processed photographic element. After imagewise exposure, a developed and stabilized image can be produced in the photographic element by heating the element to processing temperature.

Abstract: Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to improved immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photographically useful group.