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

Abstract: In high sensitivity color photographic recording materials the undesired color fog density is reduced by highly reactive DIR-compounds having an effective reaction velocity constant k.sub.eff of more than 20,000 [1 . mole.sup.-1 . sec.sup.-1 ] (measured at pH 10.2 by the method described hereinafter) in a concentration of from 10.sup.-5 to 10.sup.-3 mole per mole of silver halide, if contained in a light-sensitive silver halide emulsion layer or in a concentration of from 10.sup.-7 to 10.sup.-5 mole per gram of solids if contained in a silver-halide-free binder layer adjacent to a silver halide emulsion layer.

Abstract: Production of masked positive color images by the silver dye bleach process, by exposing a photographic material for the silver dye bleach process, silver developing, dye-bleaching, silver-bleaching and fixing, optionally, the step of silver-bleaching is carried out in a combined treatment bath together with dye-bleaching and/or fixing.

Abstract: New DIR-compounds of the formula ##STR1## are useful in photographic materials and processes.

Abstract: In color photographic sensitive materials comprising at least one direct reversal silver halide emulsion layer associated with a diffusible dye-releasing redox compound on a base, the improvement which comprises that at least one of a layer containing said redox compound or said direct reversal silver halide emulsion layer contains about 5 to 200 mg per 100 millimols silver in the emulsion layer of a compound represented by the general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 each represents a hydrogen atom or a hydrolyzable group, P, Q and R which may be the same or different each represents a hydrogen atom, an alkyl group, an aryl group, an alkylthio group, an arylthio group, a hydroxyl group, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic group or an --S--Z.sup.2 group, Z.sup.1 and Z.sup.2 may be the same or different and each represents an unsaturated heterocyclic residue which is photographically inactive when bonded to the hydroquinone through the sulfur moiety, and --S--Z.

Abstract: A process for the production of an improved photographic image is provided which comprises imagewise exposing photographic material which comprises on a support base at least one light-sensitive negative-working silver halide emulsion layer containing a color coupler (receptor layer) and in which after color processing a negative dye image only is formed, there being associated therewith at least one light-sensitive negative-working silver halide emulsion layer containing at least one DIR compound (development inhibitor releasing compound) and in which after processing no photographic image is present (donor layer), developing the photographic material in a color photographic developing solution to form a negative silver image in the layer which comprises the DIR compound and a coupled compound with the DIR compound in the areas in which the silver has been developed, so releasing the DI compound imagewise from the DIR compound and allowing the DI compound to diffuse imagewise into the layer containing the co

Abstract: Traces of free inhibitors for the development of silver halide which might be present as impurities of inhibitor releasing compounds or which might be prematurely released therefrom because of insufficient stability thereof during storage of the photographic material are scavenged by compounds which are capable of binding free inhibitors at pH values below 7 but to a much less extent at pH values higher than 9.

Abstract: A method for producing prints having continuous tone gradation which includes the steps of selectively placing solvents on a semi-opaque substrate having a surface altering the surface of the substrate enabling the substrate to hold a colorant, placing colorant on the areas of the substrate so treated, thereby producing continuous tone gradations, transferring an image of the continuous tone gradation substrate onto a conventional print plate and printing prints from the print plate. The steps of transferring can be done either by direct contact printing or by an intermediate conventional negative. The most preferred embodiment includes ethyl alcohol as the solvent, cellulose acetate as the substrate and india ink as the colorant. Multicolor prints can be made from varying density print plates produced by differing exposure times of transferring the image and overprinting the plates using differing inks.

Abstract: Development inhibitor releasing compounds of the formula ##STR1## are provided wherein R.sub.1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R.sub.1 may form an annelated ring, R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sub.3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR.sub.4, --COR.sub.4, ##STR2## or --OR.sub.4 where R.sub.4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated.The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.

Abstract: Benzotriazole compounds employed as development restrainer precursors are described having on one nitrogen atom an alkali-hydrolyzable, N,N-disubstituted carbamoyl group. The compounds may have the following formula: ##STR1## wherein: R.sup.1 and R.sup.2 each represent a substituted or unsubstituted alicyclic, aliphatic, aromatic or heterocyclic moiety, or may be taken together with the nitrogen to which they are attached to form a heterocyclic ring; andR.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent hydrogen, nitro, lower alkyl, halogen, carbamoyl, sulfamoyl, RCONH-- or RSO.sub.2 NH--, wherein R is lower alkyl or aryl.

Abstract: Photographic elements, assemblages and processes for color diffusion transfer photography are described wherein certain azole compounds having at least two nitrogen atoms are employed as development restrainer precursors. Preferred azole compounds include benzotriazoles, triazoles, tetrazoles, indazoles and benzimidazoles. The azole compounds have an alkali-hydrolyzable, N,N-disubstituted carbamoyl group on one of the two nitrogen atoms.

Abstract: In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula ##STR1## R.sub.1 =hydrogen or alkyl with 1-3 carbon atoms R.sub.2 =alkyl with up to 22 carbon atoms the group --S--Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.

Abstract: Photographic couplers which release a photographically useful group by an intramolecular nucleophilic displacement reaction can be used in photographic emulsions, elements and processes to provide a photographically useful group in a controlled manner.

Abstract: A photographic element having on a support at least one silver halide emulsion layer having associated therewith a development inhibitor precursor represented by the formula (I) ##STR1## wherein A is a phenyl group, a substituted phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring; said A splitting together with the sulfur atom in the above molecule from the residue of the molecule to provide a silver halide development inhibitor; R.sup.1 is an alkyl group having 1 to 4 carbon atoms; and R.sup.2 is a cyano group, a carbamoyl group or the group represented by the formula ##STR2## wherein R.sup.3 is an aryl group.

Abstract: A photographic material having a light-sensitive silver halide emulsion layer coated on a support and containing a compound, useful as a development inhibitor of the formula: ##STR1## wherein X, Y and Z are as herein defined, is described.

Abstract: A light-sensitive photographic material is provided which comprises, coated on a photobase, at least one silver halide emulsion layer, said emulsion layer or a layer adjacent thereto containing a development inhibitor releasing compound of the formula ##STR1## wherein R.sub.1 is substituted phenyl which contains a ballasting alkyl group, R.sub.2 represents the atoms necessary to complete a five or six membered heterocyclic ring system which may be further substituted and R.sub.3 is an aryl or heterocyclic radical, any of which ring systems may be further substituted, the group --S--R.sub.3 being a development inhibiting group.

Abstract: A method for dispersing oil-soluble photographic additives into a hydrophilic colloid composition is disclosed characterized by the use of lecithin in conjunction with an anionic surface active agent containing an --SO.sub.3 M or --OSO.sub.3 M moiety wherein M represents a cation and a hydrophobic group having 8 to 30 carbon atoms.

Abstract: In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline processing solution which comprises a neutralizing layer and a timing layer, the improvement which comprises the timing layer comprising a polymer latex which is produced by emulsion polymerization of (1) each of (A) at least one monomer selected from the group consisting of ethylene-type monomers having at least a free carboxylic acid group, a free sulfonic acid group or a free phosphoric acid group or a salt thereof and (B) at least one monomer selected from the group consisting of monomers represented by the following general formula (I) ##STR1## wherein X is a hydrogen atom, a methyl group or a --COOR.sup.1 group; Y is a hydrogen atom, a methyl group or a --(CH.sub.2).sub.n COOR.sup.2 group; Z is an aryl group, a --COOR.sup.3 group or a ##STR2## group; R.sup.1, R.sup.2 and R.sup.

Abstract: An inhibitor removing bath for effecting color formation in a color positive development process which bath comprises a color accelerating agent, a contrast control agent and a pH control agent. The inhibitor removing bath may further contain in a preferred embodiment a color reversal agent. A complete color photographic development process using this inhibitor removing bath is found to provide color positive transparencies of excellent quality.

Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, with the photographic light-sensitive material having a hydrophilic organic colloid layer containing a dispersion of a scarcely water-soluble photographic additive dissolved in an aromatic ester represented by the following general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group, an alkoxy group, an acyloxy group, an aryloxy group, an alkoxycarbonyl group or a halogen atom; R.sub.2 represents a cyclic saturated hydrocarbon group; m represents an integer of 0 to 5; n represents an integer of 1 to 6; and when m and n each represents an integer of 2 or more, the substituents represented by R.sub.1 or R.sub.2 can be the same or different.

Abstract: A silver halide photographic light-sensitive material containing a development inhibitor releasing compound, which is capable of forming a substantially colorless product, and which is represented by the following general formula (I): ##STR1## wherein X represents ##STR2## --SO.sub.2 R.sub.1, --SO.sub.2 OR.sub.1, --SO.sub.2 NH.sub.2, --SO.sub.2 NHR.sub.1, --SO.sub.2 N(R.sub.1).sub.2, --CN, --N.sup.+ (R.sub.1).sub.3 or ##STR3## R.sub.1 represents an aliphatic group, an aromatic group or a heterocyclic group and further two R.sub.

Abstract: In a color photographic material in which at least one of the partial images yellow, magenta and cyan is produced in a double layer consisting of a first layer of lower sensitivity and a second layer of higher sensitivity and arranged further away from the layer support than said first layer, at least one color unit, preferably the blue-sensitive and/or the green sensitive color unit consists of at least three layers.(a) a first silver halide emulsion layer of low sensitivity containing a color coupler(b) a second silver halide emulsion layer which may contain a color coupler, and(c) a third layer which is free from silver halide, but contains a color coupler,the coupler in said layers a, b and c forming on color development dyes of substantially the same color which is complementary to that of the light to which the layers are sensitive.

Abstract: Non-diffusible thioether compounds capable of releasing, on reaction with color developer oxidation compounds, a diffusible silver halide development inhibitor without at the same time forming permanent dyes to any substantial extent are characterized by containing a group of the formula ##STR1## or its tautomeric form, wherein Z.sup.1 represents an electron attracting substituent and X represents an aliphatic, aromatic or heterocyclic group that if released together with the sulfur atom, forms a diffusible silver halide development inhibiting mercaptane.

Abstract: Development inhibitor releasing compounds are thioether compounds capable of releasing on reaction with color developer oxidation products, a diffusible mercaptan that inhibits further development of silver halide. Useful DIR compounds correspond to the formula ##STR1## R.sup.1 represents hydrocarbyl Y represents --S-- or --NR.sup.2 --R.sup.2 represents hydrogen, hydrocarbyl or an electron-attracting substituent.X in its preferred embodiment represents a heteroaromatic group that when split of together with the sulfur atoms forms a silver halide development inhibiting mercaptane.

Abstract: A photographic light-sensitive material comprising a support having thereon at least one silver halide photographic emulsion layer and containing an emulsified dispersion comprising an organic solvent and an organic solvent gelling agent in at least one hydrophilic colloid layer thereof, a process for producing an emulsified dispersion using an organic solvent gelling agent and a process for stabilizing a photographic light-sensitive material containing an emulsion of an oleophilic photographic additive in a hydrophilic colloid layer thereof using an organic solvent gelling agent.

Abstract: For controlling in a color photographic material the gradation, graininess, sharpness, edge and interimage effect and thus improving the overall color reproduction thioether DIR compounds of the following formula are particularly useful: ##STR1## in which X is a group that if split off together with the sulfur atom forms a diffusing development inhibiting mercaptan, Y represents --O--, ##STR2## or --S--, Z represents the ring members completing a 6-membered heterocyclic ring, R.sup.1 is an aliphatic, araliphatic or aromatic hydrocarbon group, a heterocyclic group or acyl, and R.sup.2 is the same as R.sup.1 or hydrogen.