Abstract: The invention provides a color photographic material comprising at least one silver halide emulsion layer having associated therewith a dye image-forming coupler and which contains in a layer thereof an ETA (electron transfer agent) releasing compound of the general formula: ##STR1## wherein R.sup.1 is an alkyl group,R.sup.2 to R.sup.6 are individually H or an alkyl group with the proviso that when one or both of R.sup.5 or R.sup.6 are H, R.sup.3 and R.sup.4 must not be H,R.sup.7 to R.sup.11 are individually H, or an alkyl or alkoxy group,A is H or an alkyl group and B is an alkyl group or, together with the atoms to which they are attached, A and B complete a carbocyclic or heterocyclic ring group,or,when A and B are not linked together, A and R.sup.2 may together complete an aromatic or nonaromatic carbocyclic group or an aromatic or nonaromatic heterocyclic group,with the proviso that if R.sup.7 to R.sup.11 are all hydrogen then neither R.sub.3 nor R.sub.4 are methyl or hydroxymethyl.

Abstract: Photographic developing compositions are provided that are free of dihydroxybenzene developing agents and are used in the processing of photographic elements. The developing compositions have a pH in the range of from 10.1 to 10.9 and comprise at least 0.17 moles per liter of an ascorbic acid developing agent, 0.3 to 0.5 moles per liter of a sulfite and 0.2 to 0.4 moles per liter of a carbonate buffer. Also provided is an ecologically advantageous method for processing photographic elements which utilizes the non-toxic developing compositions.

Abstract: An alkaline, hydroquinone free, aqueous black-and-white radiographic developer comprising(a) an ascorbic acid developing agent;(b) a 3-pyrazolidone auxiliary developing agent;(c) an organic antifoggant;(d) a sulfite antioxidant;(e) a buffer;(f) a sequestering agent; and(g) A development accelerator selected from formulas I and II as follows: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 represent alkyl of 1 to 8 carbon atoms or R.sub.1, R.sub.2, and R.sub.3 taken together with N atom to which they are attached form a 6 or 7 membered ring and X represents a tosylate ion, halide, or BF.sub.4.sup.-.

Abstract: A process of forming a super high-contrast negative image is disclosed, which comprises the steps of imagewise exposing a negative-working silver halide photographic material comprising a support having thereon one or more hydrophilic colloidal layers, at least one of the one or more hydrophilic colloidal layers being a negative-working silver halide emulsion layer, and then developing the photographic material with a developer containing an aminophenol derivative developing agent and a reductone compound in the existence of an organic compound having a negative reduction potential. A negative-working silver halide photographic material and a photographic developer being used for the image-forming process are also disclosed.

Abstract: A process of developing exposed silver halide elements comprises developing said element in a developer in the presence of a development accelerator compound as defined. The development accelerator compounds include pyridinium, or pyridinium and and imidazolium compounds. The process is applicable to standard and hydrazine-containing films and to hydroquinone and/or ascorbic acid-based developers. The development accelerator may be incorporated into the developer or into the silver halide emulsion.

Abstract: There is described a concentrated photographic silver halide developing solution which comprises from 50 to 150 g/liter of an ascorbic acid type compound of the general formula I: ##STR1## or alkali metal salts thereof, in which the group R represents a hydroxylated alkyl group, and at least one basic compound the anion of which is carbonate, sulphite or hydroxide of which the cation is an alkali metal, especially sodium or potassium, the total sodium to total potassium ion ratio in the concentrated developing solution being from about 50:50 to 0:100 (mole: mole).Preferably the concentrated solution is entirely aqueous but it may comprise a proportion of water-miscible organic solvents such as ethyl alcohol, or glycol solvents.

Abstract: A process of forming a super high-contrast negative image is disclosed, which comprises the steps of imagewise exposing a negative-working silver halide photographic material comprising a support having thereon one or more hydrophilic colloidal layers, at least one of the one or more hydrophilic colloidal layers being a negative-working silver halide emulsion layer, and then developing the photographic material with a developer containing an aminophenol derivative developing agent and a reductone compound in the existence of an organic compound having a negative reduction potential. A negative-working silver halide photographic material and a photographic developer being used for the image-forming process are also disclosed.

Abstract: A developer for developing a silver halide photographic material is disclosed. The developer comprises a compound represented by Formula 1 or Formula 2; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are each a hydrogen atom or an alkyl group having 1 to 3 carbon atoms provided that both of R.sub.1 and R.sub.2 are not hydrogen atoms at the same time; R.sub.5 is a hydroxy group, an amino group or an alkyl group having 1 to 3 carbon atoms; R.sub.6 and R.sub.7 are each a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an acyl group having 1 to 18 carbon atoms or a --COOM.sub.2 group, provided that both of R.sub.1 and R.sub.2 are not hydrogen atoms at the same time, in the above M.sub.1 is a hydrogen atom, an alkali metal atom or an ammonium group; m is an integer 0, 1 or 2; and M.sub.2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkali metal atom, an aryl group or an aralkyl group having not more than 15 carbon atoms.

Abstract: A process for forming a color image comprises the step of developing an image-wise exposed silver halide color photographic material with a color developing composition containing an N-(4-aminophenyl)pyrrolidine derivative such as ##STR1## which produces an excellent hue in a rapid process.

Abstract: An improved photographic developing solution is free of dihydroxybenzene developing agents such as hydroquinone, has a pH in the range of from 9.5 to 11.5 and comprises (1) an ascorbic acid developing agent, (2) an auxiliary super-additive developing agent and (3) a carbonate buffering agent in a concentration of at least 0.5 molar. The developing solution is broadly useful in black-and-white development but is most advantageously employed in a process for forming a high-contrast image utilizing a silver halide photographic element comprising a hydrazine compound which functions as a nucleating agent and an amino compound which functions as an incorporated booster. The developing solution is ecologically advantageous, exhibits excellent stability with respect to seasoning effects, and provides high speed and good upper scale contrast combined with a low level of pepper fog and a moderate degree of chemical spread.

Abstract: An improved photographic developing solution is free of dihydroxybenzene developing agents such as hydroquinone, has a pH in the range of from 9.5 to 11.5 and comprises (1) an ascorbic acid developing agent, (2) an auxiliary super-additive developing agent and (3) a carbonate buffering agent in a concentration of at least 0.5 molar. The developing solution is broadly useful in black-and-white development but is most advantageously employed in a process for forming a high-contrast image utilizing a silver halide photographic element comprising a hydrazine compound which functions as a nucleating agent and an amino compound which functions as an incorporated booster. The developing solution is ecologically advantageous, exhibits excellent stability with respect to seasoning effects, and provides high speed and good upper scale contrast combined with a low level of pepper fog and a moderate degree of chemical spread.

Abstract: A process of forming superhigh-contrast negative images is disclosed. The process comprises the steps of imagewise exposing a substantially surface latent image-type silver halide photographic material which is spectrally sensitized with a sensitizing dye and then developing said photographic material with a developer, wherein said photographic material contains a heterocyclic thione compound and said developer comprises (a) an aminophenol derivative developing agent, (b) a reductone compound, (c) a quaternary ammonium salt, and (d) a compound represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, a nitro group, a halogen atom, or a cyano group, and wherein said development processing is carried out in the existence of at least one kind of a polyalkylene oxide or a derivative thereof. The process provides negative images of superhigh contrast having gamma over 10 substantially free from appearance of pepper.

Abstract: An environmentally-safe, non-toxic non-hydroquinone and non-alkali metal hydroxide containing photographic developer composition is provided comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrazolidone developer compound.

Abstract: A method for processing a silver halide color photographic material is disclosed, which comprises developing a silver halide color photographic material with a color developer comprising:(a) an aromatic primary amine color developing agent;(b) at least one brightening agent represented by formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydroxyl group, an alkoxy group, an amino group, an alkylamino group, an aryloxy group or an arylamino group; provided that R.sub.1 is not the same as R.sub.3 when R.sub.2 is the same as R.sub.4, and R.sub.1 is not the same as R.sub.4 when R.sub.2 is the same as R.sub.3 ; and M represents a monovalent cation; and(c) at least one organic phosphonic acid series chelating agent.

Abstract: The addition to an aqueous alkaline developer composition for silver halide photographic materials of a dialkylaminomethane diphosphonic acid compound sequestering agent increases the resistance of the developer composition against aerial oxidation and inhibits calcareous deposit formation.

Abstract: A silver halide color photographic material having at least one silver halide emulsion layer on a reflective support is, after having been imagewise exposed, subjected to color development with a color developer which does not substantially contain benzyl alcohol and which contains a bromide ion in an amount of 4.times.10.sup.-3 mol/liter or less, for a period of time of 2 minutes or less, to obtain a color images with a high colored density. The silver halide color photographic material specifically has at least one silver chlorobromide emulsion layer which does not substantially contain silver iodide and which contains silver chloride in an amount of 50 mol % or more.In the color images thus formed by the present process, the colored density is high and the fog is less.

Abstract: Process for preparing photographic emulsion comprising bringing aqueous silver and chloride-containing halide salt solutions into contact in the presence of a dispersing medium to form octahedral silver halide grains having a halide content of at least 50 mole percent chloride, based on total moles of silver present, the improvement forming the grains in the presence of a crystal modifying amount of an aminoazapyridine as described in pH range of 2.5 to 9, pCl range of 0 to 3, the aminoazapyridine compound being added after at least about 6% to about 45% of the silver salt solution has been added.The photographic emulsion is useful in x-ray, laser scanner films, as color separation elements and inverse transfer systems, etc.

Abstract: A process for forming an image by silver salt diffusion transfer comprising developing a light-sensitive element which comprises a support having provided thereon a light-sensitive silver halide emulsion layer which has been imagewise exposed to light by an alkaline processing composition in the presence of a silver halide solvent so that at least a part of silver halide unexposed in said emulsion layer is converted to a transferable silver complex salt, and then transferring at least a part of said silver complex salt to an image-receiving layer containing a silver precipitating agent to form an image on said image-receiving layer, wherein the concentration of said silver precipitating agent in said image-receiving layer is in the range of from 2.times.10.sup.-6 to 8.times.10.sup.-6 mol/m.sup.2 and at least one of said light-sensitive element and said alkaline processing composition contains at least one of a compound represented by formula (I) and a compound represented by formula (II) ##STR1## wherein R.

Abstract: A color diffusion photographic film unit comprising (a) a light sensitive element comprising at least one photosensitive silver halide emulsion layer associated with a redox compound adapted to release a diffusible dye, (b) an image receiving element, and (c) an alkaline processing composition element, wherein a 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent of the following general formula (I) or a precursor thereof is incorporated in at least one of said elements (a) through (c) ##STR1## wherein R.sub.1 is methyl or ethyl and R.sub.2 is hydrogen or a group cleavable under alkaline conditions is disclosed.

Abstract: In a process for forming an image by diffusion transfer, this process for forming an image comprises performing the diffusion transfer by using a hydroxylamine represented by the formula: ##STR1## as a developing agent, and using a cyclic imide as a silver halide solvent in the presence of a 1-aryl-3-pyrazolidinone compound represented by the formula: ##STR2##

Abstract: A lithographic type diffusion transfer developing composition which provides high contrast images having sharp toe-gradation for developing silver halide light-sensitive materials contains at least one amine represented by one of the following general formulae (I), (II) or (III):H.sub.2 N-C.sub.n H.sub.2n -X (I) ##STR1## X, X', R.sub.1, n and m are defined in the specification. The process of developing using such a composition is also disclosed.

Abstract: Silver halide photographic materials providing wash-off relief images and having excellent shelf life comprising a support having formed thereon at least a silver halide photosensitive emulsion layer and said silver halide emulsion layer or another hydrophilic colloid layer containing a polyhydroxy-spiro-bis-chroman tanning developing agent and a gallic acid alkyl ester is disclosed with a process forming relief images.

Abstract: A developer for developing a silver halide light-sensitive material and an image forming method using the developer are disclosed. The developer contains a compound represented by the following formula I or II and a compound containing a thioether group. ##STR1## wherein Y, Y.sub.1 and Y.sub.2 are each a hydrogen atom or a mercapto group, and R and R.sub.1 are each a substituent. A silver halide light-sensitive material containing silver halide grains comprising not less than 50 mol % of silver chloride and have a ratio of (100) surface and (111) surface of not less than 5 is preferably used in the image forming method. Developing speed and sensitivity of light-sensitive material can be rised by use of the developer.

Abstract: An image-forming process for silver halide photographic material is disclosed, in which the photosensitive material have at least one silver halide emulsion layer on a support and contains a hydrzaine compound in the emulsion layer or other constitutional layers. The image-forming process comprises developing the photographic material containing the hydrozine compound of formula (I) with the developing agent of formula (II).