Abstract: Photographic silver halide material developed in the presence of a novel antifogging or stabilizing compound which is present in the material and/or in the developing composition and corresponds to the following formula: ##STR1## wherein: Q is sulphur or seleniumX is sulphur, selenium or oxygenY is sulphur, selenium, oxygen or a single bond,R.sup.1 stands for an alkyl group having no nitrogen containing substituents or an aryl group,R.sup.2 represents the same groups as indicated for R.sup.1, provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded,R.sup.3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, andR.sup.4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents, when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group,R.sup.3 and R.sup.

Abstract: A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##STR1## wherein: R.sub.1 represents hydrogen, an aliphatic group or a cycloaliphatic group, andR.sub.2 represents an aliphatic oxy group, a cycloaliphatic oxy group, an aryloxy group, an amino group of the formula ##STR2## in which R.sub.3 and R.sub.4 (same or different) represent hydrogen, an aliphatic, a cycloaliphatic or an aromatic group or R.sub.3 and R.sub.4 represent together the necessary atoms to close a heterocyclic nitrogen containing nucleus; ##STR3## wherein: R.sub.5 represents an aliphatic, cycloaliphatic, aromatic or heterocyclic group, is caused to effect in said layer under the influence of information-wise heating an information-wise reduction of a reducible reaction partner.

Abstract: Image-receiving material for the production of photographic copies in a dry manner with a layer containing a nonlight-sensitive silver salt and a phthalazinone compound corresponding to the following general formula : ##STR1## wherein : R represents 1. an aliphatic group including a cycloaliphatic group and such groups in substituted form,2. an aryl group including a substituted aryl group,3. a heterocyclic group including a substituted heterocyclic group, or4. an acyl group.

Abstract: A method of developing an exposed lith-type silver halide emulsion is described wherein development takes place in the presence of a sulphonium compound corresponding to the formula: ##STR1## wherein: EACH OF X.sub.1 and X.sub.2 represents an alkyl group at least one of which carries a hydroxy, carboxy, sulpho or cyano group,R represents an alkyl group, an aryl group or the group ##STR2## wherein A is a divalent organic group, or R may represent hydrogen when both X.sub.1 and X.sub.2 are hydroxyalkyl,n is an integer of at least 1 when the compound is a disulphonium compound and is an integer of at least 2 when the compound is a monosulphonium compound, andZ is an anion but does not exist when one of X.sub.1 and X.sub.2 itself contains an anionic group.

Abstract: Direct-positive emulsions are described comprising incorporated developing agents wherein the developing agents are 1,4-dihydroxybenzene compounds of which at least one of the hydroxyl groups has been esterified to form a hydrolyzable aliphatic acyloxy group comprising a quaternary ammonium group.

Abstract: Polyoxyethylene compounds carrying thioether groups as substituents on the linear chain are described for accelerating or activating development of exposed silver halide elements.

Abstract: Thermographic recording material or image-receiving material for dry copying processes comprising at least one layer and a substantially non-photosensitive reducible silver salt, a reducing agent, and optionally a toning agent or toning mixture, wherein the reducing agent corresponds to the following general formula: ##STR1## wherein: EACH OF R.sup.1, R.sup.3 and R.sup.5 (equal or different) represents hydrogen, a straight-chain or branched alkyl group comprising 1 to 9 carbon atoms, or a cycloalkyl group, with the proviso that R.sup.1 and R.sup.5 do not represent hydrogen simultaneously,R.sup.2 represents a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,R.sup.4 represents hydrogen, or a straight-chain or branched alkyl group comprising 1 to 4 carbon atoms, or a cycloalkyl group,And wherein each of R.sup.1 and R.sup.2 together, R.sup.2 and R.sup.3 together or R.sup.4 and R.sup.

Abstract: A method of producing a colored image by developing a latent silver image obtained by the image-wise photo-exposure of a photosensitive silver halide material, wherein the development is carried out with p-phenylenediamine corresponding to the following general formula: ##STR1## wherein: EACH OF R'.sub.1, R'.sub.2, R'.sub.3, and R'.sub.4 (same or different) represents an alkyl group, in the presence of1. a hydrazone compound having the following general formula: ##STR2## wherein: N IS 1, 2, OR 3,R.sub.1 is hydrogen or an acyl group, andR.sub.2 is a --CONH.sub.2 group or a --SO.sub.2 X group, wherein X represents a hydroxyl group, an amino group, an aliphatic group, an aryl group or an heterocyclic group,R.sub.3 is an alkyl group or an aryl group, andZ represents the necessary atoms to close a nitrogen-containing heterocyclic nucleus, and2. a color coupler of the phenol, naphthol, or active methylene compound series.

Abstract: A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##EQU1## wherein: R.sub.1 represents hydrogen, an aliphatic group of a cycloaliphatic group, andR.sub.2 represents an aliphatic oxy group, a cycloaliphatic oxy group, an aryloxy group, an amino group of the formula ##EQU2## in which R.sub.3 and R.sub.4 (same or different) represent hydrogen, an aliphatic, a cycloaliphatic or an aromatic group or R.sub.3 and R.sub.4 represent together the necessary atoms to close a heterocyclic nitrogen containing nucleus; ##EQU3## wherein: R.sub.5 represents an aliphatic, cycloaliphatic, aromatic or heterocyclic group, is caused to effect in said layer under the influence of information-wise heating an information-wise reduction of a reducible reaction partner.

Abstract: A method is described for developing silver halide emulsions wherein development is activated by incorporating in the developing composition or the emulsion a homopolymer or copolymer comprising (meth)acrylate or (meth)acrylamide units in which the ester linked or amide linked group contains at least one thioether sulphur atom.

Abstract: Heterocyclic mercapto compounds are added to a binder layer containing colloidal silver which is comprised in a color photographic multilayer material. The colloidal silver layer may be a yellow filter layer to prevent exposure of the green, and red recording layers to blue light, or an antihalation layer arranged between the layer support and the lowermost light sensitive silver halide emulsion layer. The heterocyclic mercapto compounds reduce the contact fog produced in the (first) developer and increase color density in reversal processing. Additionally there can be present in the colloidal silver layer a sensitizer for the blue, green or red spectral region.