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: 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: 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: A sheet material including in working relationship with a reducible silver salt a sterically hindered phenol derivative having the following structural formula: ##STR1##

Abstract: Photographic silver halide materials are described which comprise as antifogging agent a compound of the formula: ##SPC1##Wherein:X is a hydroxy or carboxy group or a substituent or fused-on azole heterocyclen is 1 to 4, andR is hydrogen, halogen, alkyl, alkoxy, alkoxycarbonyl, sulpho, aryl, fused-on benzene or X.