Abstract: The present invention relates to a flue gas conditioning agent demand control apparatus for controlling a flow of conditioning agent for removal of entrained particles in a flue gas with an electrostatic precipitator having at least one charging electrode and at least one collecting electrode through the use of a signal determined from a rate of discharge of a charged electrode of the electrostatic precipitator.

Abstract: A flue gas conditioning system features a self-contained sulfur burner control loop that operates to maintain a constant desired temperature supply of sulfur dioxide in air by varying the rate of supply of sulfur fuel to the sulfur burner, and the absence of device in the sulfur flow path to measure or monitor sulfur flow rate. In the system, a conditioning agent demand signal operates either a means to supply the sulfur burner with a flow of air, or an air heater in the air flow path upstream of the sulfur burner, or both, to provide conditions that would increase or decrease the temperature of the sulfur burner output absent the self-contained sulfur burner control loop, and as a result of the operation of the self-contained sulfur burner control loop, systems of the invention can provide a demanded flow of sulfur dioxide and air at a substantially constant concentration and a desired temperature to a catalytic converter in response to a conditioning agent demand signal.

Abstract: Disclosed is an exhaust gas purifying apparatus for an automobile diesel engine including a pair of electrodes disposed at a predetermined interval in an exhaust path of an automobile diesel engine, and a high voltage power source for applying a high voltage to the pair of electrodes whereby an electric field is generated in a space between the pair of electrodes so as to collect diesel particulates. Since the diesel particulates emitted from a diesel engine are charged heavily in negative, and since the exhaust gas purifying apparatus forms an electric field between the pair of electrodes, the diesel particulates are collected on one of the pair of electrodes.

Abstract: Novel azo compounds and their preparation are provided. These compounds have the general formula ##STR1## wherein X is N or CR.sub.4 where R.sub.4 is a hydrogen atom or an optionally substituted alkyl or aryl group, Y is S.sup..sym., N.sup..sym. R.sub.5, O.sup..sym. or N where R.sub.5 is an optionally substituted alkyl or aryl group, R.sub.1 is an optionally substituted alkyl or aryl group, R.sub.1 is a substituted aromatic or heterocyclic group containing a ballasting group, R.sub.2 and R.sub.3 are each hydrogen or alkyl groups having 1 to 4 carbon atoms, or R.sub.2 and R.sub.3 together with the nitrogen atom complete a heterocyclic ring, or one of R.sub.2 or R.sub.3 can be hydrogen and the other of R.sub.2 or R.sub.3 can be aryl. There may be further substitution in either of the benz rings and these rings may be benzannelated. These azo compounds are useful in the photographic field especially in the photographic dye diffusion transfer process for the production of photographic images.

Abstract: In the development of color negatives the same are pre-soaked in an acid-inhibited developing agent bath of typically two to four times normal concentration. Subsequent substantially normal development provides up to 21/2 stops (six times) greater sensitivity of the emulsion after photographic underexposure. Excessive contrast, grain, and fog are minimized, and necessary tracking parallelism of the contrast curves for the three layers of the color-sensitive emulsion is maintained. Deliberate underexposure in studio motion-picture-making can now be allowed, thereby to effect a highly significant saving of electrical energy in stage lighting.

Abstract: A method for forming images which comprises image-amplifying an image-wise exposed photographic element comprising a support having thereon at least one silver halide photographic layer containing an image-wise distributed material having a catalytic action by processing the photographic element with a solution containing (1) at least one cobalt (III) complex and (2) at least one organic phosphonic acid compound in the presence of a reducing agent.

Abstract: An hydroxylamine and a member selected from the group consisting of alkanolamines which are free of carboxyl substitution, aliphatic monoamino monocarboxylic acids of up to three carbon atoms, and aminobenzoic acids, are employed in combination in a photographic color developing composition comprising a primary aromatic amino color developing agent for the purpose of retarding aerial oxidation of the developing agent. This combination can be used to replace all or part of the sulfite that is commonly employed in color developers, to thereby avoid or reduce the disadvantages resulting from the fact that sulfite competes with couplers for oxidized developing agent.

Abstract: A reversal color photographic process which comprises subjecting an exposed silver halide color photographic light-sensitive material to a first black-and-white development and then (a) color developing the light-sensitive material with a color developing solution containing a water-soluble stannous salt and a phosphonocarboxylic acid compound or (b) processing the light-sensitive material with a fogging bath containing a water-soluble stannous salt and a phosphonocarboxylic acid compound and then color developing the light-sensitive material, the phosphonocarboxylic acid compound being represented by the general formula (I): ##STR1## wherein R.sub.1 is --COOM' or --PO(OM).sub.2 ;R.sub.2 is a hydrogen atom, an alkyl group containing 1 to 4 carbon atoms, --(CH.sub.2).sub.n COOM' or a phenyl group;R.sub.3 is a hydrogen atom or --COOM';M and M', which may be the same or different, each is a hydrogen atom, an alkali metal atom or an ammonium group;M is 0 or 1; andN is 1 to 4.

Abstract: A high speed color reversal cine film with latent images recorded thereon is so processed as to color-develop the latent images and concurrently reduce the high contrast at the dark end of the tone scale which is inherent in the prior art development of such film. The new method utilizes in the color developer bath increased amounts (in comparison with prior art color developer baths) of a competing coupler such as citrazinic acid and of a silver halide solvent such as ethylene diamine and reduces the amount of a reversal agent such as t-butylamine borane, and also includes a competing non-coupling developer such as 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, or phenidone, or a derivative thereof.

Abstract: Suitable masking compounds for masking the undesired color side densities of image dyes produced from color couplers are those of the following formula ##STR1## in which R.sup.1 represents hydrogen or one or more substituents such as halogen, alkyl, aryl, a heterocyclic group alkoxy, hydroxyl, amino, acylamino, sulfo, sulfonyl, carboxyl or carbamyl or condensed carbocyclic or heterocyclic ring.R.sup.2 represents alkyl, aryl, a heterocyclic group carboxyl or esters or amide derived from carboxylX represents a dye group optionally containing a solubilizing group.On development with black-and-white or color-forming developers the dye group is released imagewise and is removed by aqueous processing baths leaving back a positive color or masking image.

Abstract: A method for processing a silver halide color photographic light-sensitive material which comprises developing an image-wise exposed silver halide color light-sensitive material in the presence of (a) an aromatic primary amine color developing agent, (b) hydroxylamine or a hydroxylamine derivative, and (c) a 1-aryl-3-pyrazolidone derivative containing two substituent groups at the 4-position thereof.

Abstract: A dye-releasing mechanism is described which employs a nondiffusible dye-releasing compound having a dye or dye-precursor moiety attached thereto through a sulfonamido cleavage linkage so that a diffusible sulfonamide dye or dye-precursor will be released upon oxidation and subsequent alkaline hydrolysis of the compound.

Abstract: A light-sensitive silver halide photographic material having improved anti-fogging properties is described.

Abstract: A photographic process for forming photographic images comprising processing a photographic element comprising a support and at least a silver halide photographic emulsion layer having image-wise distributed therein a material possessing a catalytic action with a cobalt (III) complex with a photographic processing solution containing at least a cobalt (III) complex having a coordination number of 6 in the presence of a primary aromatic amine developing agent, in which the formation of fog is prevented by contacting the photographic processing solution with one side of a fine open-cell porous diaphragm of a hydrophobic material, such as a porous Teflon film, the other side of which is in contact with an acid solution, whereby fogging components in the processing solution are removed from the processing solution into the acid solution through the porous diaphragm.

Abstract: A process is disclosed of forming a reversal dye image. This is accomplished by developing an imagewise exposed photographic element with a black-and-white developer and poisoning the developed silver as a redox amplification catalyst for a peroxide oxidizing agent. The undeveloped silver is then rendered developable to form a silver catalyst image pattern. This latter silver image pattern is then used to catalyze the redox reaction of a peroxide oxidizing agent and a dye-image-generating reducing agent, such as a color-developing agent, or a redox dye-releaser.

Abstract: In a method of processing an image-wise exposed silver halide color photographic material by applying thereto at least a color development processing and a silver removal processing (including performing a bleaching and a fixing separately or simultaneously, (e.g., a blixing)), the improvement which comprises processing, after the color development processing, the silver halide color photographic material with a processing bath containing a compound, as a bleach accelerator, represented by the following general formula (I): ##STR1## wherein R represents an --NR.sup.4 R.sup.5 group, an --O--R.sup.6 group or an --S--R.sup.6 group; R.sup.6 represents an atomic group necessary for forming a ring together with R.sup.1 ; R.sup.1, R.sup.4 and R.sup.5, which may be the same or different, each represents a hydrogen atom or an alkyl group; R.sup.2 and R.sup.

Abstract: A method for forming images which comprises processing a silver halide color photographic light-sensitive element containing in the uppermost layer thereof a matting agent composed of methyl methacrylate-methacrylic acid copolymers having a methyl methacrylate/methacrylic acid molar ratio of 6:4 to 9:1 at a temperature above about 30.degree. C. The matting agent is capable of being dissolved into alkaline processing solutions and does not adversely affect the transparency and graininess of the images formed.

Abstract: A film or paper for producing a colored image from a monochromatic source image comprising four silver halide emulsion layers. A first layer of slow speed emulsion produces an underexposed negative image while a second layer of slow speed emulsion produces an underexposed positive image. The two remaining layers of fast speed emulsion produce an overexposed positive image and an overexposed negative image.A novel process is disclosed wherein the film or paper is developed in a first developer and only two emulsion layers given reversal exposure. The four emulsions are then developed to three opposite tonal gradations in the three subtractive primary colors, thereby producing a false color image.

Abstract: A photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer containing a coupling compound which forms a colorless compound with oxidized developer, said coupling compound having the formula ##STR1## wherein R, X and Y are defined in the specification.

Abstract: Color developers represented by the following general formula are useful as color developing agents: ##STR1## R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are defined herein.

Abstract: An exposed light-sensitive silver halide photographic material containing a coupler is processed with a developing bath and thereafter with an amplifying bath containing hydrogen peroxide, said process being characterized in that a compound acting on the silver halide at the unexposed portion of the photographic material is incorporated into the developing bath or into a bath used for a treatment effected after the development and before processing with the amplifying bath.

Abstract: A yellow color forming photographic coupler represented by the following general formula (I) ##STR1## in which X represents an aliphatic group, an aromatic group or a heterocyclic group; Y represents a hydrogen atom or a coupling off group; R.sub.1 and R.sub.2 each represents an aliphatic group, or R.sub.1 and R.sub.2 can combine to form a ring; and R.sub.3 and R.sub.4 each represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group.

Abstract: My invention is directed to a process of forming dye images. I accomplish this through a first redox amplification reaction in which a cobalt (III) complex oxidizing agent enters into a redox reaction with a reducing agent at the site of a catalyst image. A second redox amplification reaction follows in which a peroxide oxidizing agent is employed along with dye-image-generating reducing agent to form a dye image corresponding to the pattern of the catalyst.

Abstract: An improved method for processing an imagewise exposed light-sensitive silver halide photographic material containing a coupler is described, wherein the siliver halide photographic material is processed with a developing bath and thereafter processed, in the presence of imagewise developed silver and a color developing agent, with a solution containing hydrogen peroxide, whereby, after the development, the developed light-sensitive silver halide photographic material is processed with a solution containing a deactivating agent or a silver halide solvent, and thereafter subjecting the thus processed light-sensitive silver halide photographic material to spraying with and/or intermittent dipping in said solution containing hydrogen peroxide.

Abstract: A process is disclosed of forming a reversal dye image. This is accomplished by developing an imagewise exposed photographic element with a black-and-white developer and poisoning the developed silver as a redox amplification catalyst for a peroxide oxodizing agent. The undeveloped silver is then rendered developable to form a silver catalyst image pattern. This latter silver image pattern is then used to catalyze the redox reaction of a peroxide oxidizing agent and a dye-image-generating reducing agent, such as a color-developing agent, or a redox dye-releaser.

Abstract: My invention is directed to a process of forming dye images. I accomplish this by bleaching a silver image at least in part with a cobalt bleaching agent to form within the silver image pattern an immobile cobalt reaction product. The concurrent presence of the immobile cobalt reaction product, a peroxide oxidizing agent and a dye-image-generating reducing agent within the silver image pattern allows a dye image to be formed which corresponds to the silver image pattern.

Abstract: The present invention is directed to a process of forming a photographic element capable of forming a reversal image including a support and two silver halide emulsion layers primarily responsive to a different portion of the visible spectrum upon imagewise exposure of the photographic element. The emulsion layers are positioned to permit iodide ion migration therebetween upon development. Each emulsion layer contains silver halide grains capable of forming a latent image upon imagewise exposure and a hydrophillic colloid suspending the grains. One of the emulsion layers is comprised of silver haloiodide grains. One other of the silver halide emulsion layers additionally contains suspended in the hydrophilic colloid and interspersed with the latent image forming silver halide grains surface fogged silver halide grains which are spontaneously developable independently of imagewise exposure of the photographic element as though exposed to imaging radiation of maximum intensity.

Abstract: The invention relates to a color-positive process for producing a color surface picture using color paper having diffusion-resistant and protected color couplers or plastic-coated or plastic uncoated color paper of color negatives, and features color developing the picture at a temperature in the range of from about 20.degree. C to about 50.degree. C with a developer having added thereto a development accelerator having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are H, CH.sub.3, or CH.sub.2 --CH.sub.3 and "n" is in the range of from 1 to 4, bleach fixing and stabilizing the picture in a solution having a pH from about 5.5 to about 6.0 without an intermediate step of washing or a stop-fixing bath, and thereafter, washing the picture.

Abstract: The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of a developing agent to release a substance promoting bleaching of developed silver at the bleaching or blixing step after the development treatment is incorporated into at least one layer constituting said photosensitive material.

Abstract: A photographic color coupler in which a hydrogen atom at the coupling position capable of coupling with an oxidation product of an aromatic primary amine developing agent is substituted with a group represented by the following general formula: ##STR1## wherein R and R', which may be the same or different, each represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group, an alkylthio group, an aryloxy group, a hydroxy group, or an amino group, and R and R' can combine each other to form a ring; and X represents an oxygen atom or a sulfur atom. These photographic color couplers are a novel class of two-equivalent color forming couplers which are suitable for use in color photography. A color photographic light-sensitive material containing the above described photographic color coupler and a method of forming a color image comprising developing an exposed photographic light-sensitive material in the presence of the above described photographic color coupler are also disclosed.

Abstract: A method is described of developing a photographic silver halide element containing developable silver halide by development in the presence of a development accelerator which is a compound corresponding to the following general formula and containing in its molecule at least one thioether sulphur atom linked to two carbon atoms: ##STR1## WHEREIN: R is hydrogen, hydroxy, hydroxyalkyl, alkoxy, alkylthio or alkylamino,Alk is en alkylene group which may be interrupted by --O--, --S--, or --N(Q)-- wherein Q is hydrogen or a C.sub.1 -C.sub.

Abstract: An image-forming process which comprises, upon conducting intensification of images using an intensifier containing at least one intensifying agent selected from the group consisting of peroxides, halogenous acids and cobalt (III) complex compounds, on a color photographic element comprising a support having at least one silver halide emulsion layer in the presence of a reducing agent, adding a mercapto group-free and nitrogen-containing hetero ring compound and a compound represented by the following general formula having a polymerization degree of 1 - 8,000;-- (A).sub.x -- (B).sub.y --wherein A represents ##STR1## or --CH.sub.2 --CH.sub.2 --O--, wherein R represents ##STR2## or --OH, with m being an integer of 3 - 7, R.sub.1 is an alkyl group having 1 to 6 carbon atoms, and R.sub.

Abstract: In an image intensification which comprises reacting a photographic element comprising a support having provided thereon at least one silver halide emulsion layer with at least one highly active intensifying agent comprising halogenous acids and peroxides in the presence of a reducing agent, and, if necessary or desired, a color former, a method for forming images which comprises treating the photographic element with an intensifying bath comprising1. at least one nitrogen-containing heterocyclic compound possessing an anti-fogging effect and having no mercapto group;2. bromide ions in an amount of 1 .times. 10.sup.-4 gram ion/liter or more; and3. the highly active intensifying agent in an amount of 0.25 mol/liter or more.

Abstract: The addition of either a borohydride or borane complex anhydrously associated with an aldose to an inhibitor removing bath which does not contain a color reverse agent improves color balance and contributes color agent to the bath. Addition of these anhydrously associated materials avoids possible decomposition in premixed solutions.

Abstract: A color photographic material comprising at least one light-sensitive silver halide emulsion layer having preferably a non-diffusing color coupler associated to it and at least one non-lightsensitive binder layer containing a colloidal silver dispersion provides less contact fog and a better color reproduction if the non-lightsensitive binder layer containing the colloidal silver dispersion contains also a soluble iodide, particularly sodium, potassium or ammonium iodide. Alternatively the soluble iodide may also be contained in a non-lightsensitive binder layer adjacent that binder layer which contains the silver dispersion.

Abstract: An intensification processing in photographic processing for color photographic elements is effectively performed with less formation of fog by incorporating in at least one of the silver halide emulsion layers or in an auxiliary layer adjacent to a silver halide emulsion layer one or more compounds of the general formula--(A).sub.x -- (B).sub.y --wherein A represents ##STR1## (wherein R represents ##STR2## or --OH; m represents an integer of 3 to 7; R.sub.1 represents an alkyl group of 1 to 6 carbon atoms; and R.sub.

Abstract: A method of forming an image which comprises subjecting a photographic element comprising a support and at least one photographic layer in which there is image-wise distributed a substance having a catalytic effect to image-wise intensification in the presence of a reducing agent using a solution containing: (1) at least one of hydrogen peroxide and compounds capable of releasing hydrogen peroxide or a halogenite, and (2) at least one nitro-substituted nitrogen-containing heterocyclic compound represented by the following General Formulae (I) and (II); ##STR1## in which R.sub.1 represents hydrogen atom, an alkyl group, SO.sub.3 M or COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium group, X represents nitrogen atom or CR', wherein R' represents a hydrogen atom or a lower alkyl group, and ##STR2## in which R.sub.2 represents hydrogen atom, an alkyl group, SO.sub.

Abstract: A method is described of developing a photographic silver halide element containing developable silver halide by means of a silver halide developing composition, comprising as development activator a derivative of a polyethylene glycol or a C.sub.1 -C.sub.5 monoalkyl ether thereof corresponding to the formula:R.sub.1 O(CH.sub.2 CH.sub.2 O).sub.n X--A--Y--R.sub.2whereinR.sub.1 is hydrogen, C.sub.1 -C.sub.5 alkyl or the group X--A--Y--R.sub.2n is an integer of at least 4X is CO, SO.sub.2, CONH or, when R.sub.1 is X--A--Y--R.sub.2 may be a chemical monovalent bond,A is alkylene or arylene,Y is a sulphur or selenium atom, andR.sub.2 is an alkyl group.

Abstract: Reversal color images are produced in silver halide photographic elements which employ a leuco dye comprising the reaction product of a color-forming coupler and an N,N-dialkyl-p-phenylenediamine stabilized against aerial oxidation by an electronegative group attached to the benzene ring. A method is disclosed which comprises developing a silver image in imagewise exposed areas of the silver halide element. The residual silver halide in unexposed areas is then fogged and developed while concurrently oxidizing the leuco dye in these unexposed areas to form a dye image which is a reversal of the imagewise exposure. Developed silver is then removed from the element to leave a dye image without oxidizing the leuco dye in the imagewise exposed areas of the element.

Abstract: A light-sensitive color photographic material comprises four silver halide emulsion layer units, one for recording each of the yellow, magenta and cyan partial images and one which serves as a color correction layer. The latter mentioned silver halide emulsion layer is fogged, has a lower light-sensitivity than the light-sensitive partial image recording layer, and contains color couplers for producing a yellow to magenta masking image to compensate for the undesired side densities in at least two image recording layers.

Abstract: A process is disclosed for producing a positive colored image in an imagewise exposed photographic element. The element is comprised of a support having coated thereon at least one layer of a hydrophilic colloid coating containing at least one light-sensitive silver halide and, in association with said silver halide, a substantially colorless, image dye-providing compound. The image dye-providing compound is reactive with oxidized color-forming reducing agent to yield a bleachable image dye. The process is comprised of the following steps: A silver image is developed in the imagewise exposed areas of the photographic element and a low level silver fog is formed in the remaining areas of the element. Image dye-providing compound is then converted to a bleachable image dye uniformly throughout the photographic element using the silver as a catalyst for a redox reaction of a color-forming reducing agent and a cobalt(III) complex amplifier oxidizing agent.

Abstract: A process for forming color photographic images which comprises color-developing at temperatures higher than about 30.degree. C a multilayer color photographic material comprising a support having thereon at least two photosensitive emulsion layers each containing a coupler which can form a non-diffusible colored dye on coupling with the oxidation product of an aromatic primary amino color developing agent and at least one fogged emulsion layer containing a coupler which can form a non-diffusible colored dye on coupling with the oxidation product of an aromatic primary amino color developing agent.

Abstract: A photographic silver halide emulsion containing a yellow color forming coupler, in which one hydrogen atom of an active methylene group is replaced by a 2,5-dioxo-1-imidazolidinyl group, in which a nitrogen atom at 3-position and a carbon atom at 4-position are connected to form a ring through a divalent aliphatic radical, a photographic element containing the emulsion and a method for forming color photographic images which comprises developing the image-exposed photographic silver halide emulsion with a primary aromatic amino developing agent. These yellow color forming couplers have a high coupling reactivity as well as no adverse effect on the bleaching of developed silver and thus they are suitable for use in rapid processing type color photographic materials.

Abstract: A light-sensitive silver halide color photographic material comprising a new development inhibitor releasing type compound and a hardening agent and a process for developing thereof.

Abstract: A process for the preparation of 4-amino-3-methyl-N-substituted or unsubstituted alkylanilines comprising acylating and/or sulfonylating 4-amino-3-methyl-nitro-benzene having the formula (I) ##STR1## with an acylation or sulfonylation agent to obtain a compound having the general formula (II) ##STR2## wherein R.sub.1 represents a hydrogen atom or an acyl group, R.sub.2 represents an acyl group or a sulfonyl group, or R.sub.1 and R.sub.2 can combine as a difunctional acyl group; reducing the nitro group of the compound having the general formula (II) with hydrogen in the presence of a metal hydrogenation catalyst to obtain a compound having the general formula (III) ##STR3## wherein R.sub.1 and R.sub.2 are as above defined; alkylating the amino group of the compound having the general formula (III) with an alkylation agent selected from the group consisting of an alkyl halide, a substituted alkyl halide and an alkylene oxide to obtain a compound having the general formula (IV) ##STR4## wherein R.sub.1 and R.

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 photographic silver halide material with at least one halide emulsion layer and at least one substance in heterogeneous contribution emulsified in oilformer compounds and a process of preparing the said photographic silver halide materials. The substances are introduced into photographic emulsions prior to coating by way of adding a hydrophilic phase containing in emulsified form the substances which are emulsified in the hydrophilic phase in form of a solution containing at least one substantially diffusion-resistant, substantially water-insoluble, substantially non-coupling dispersible .beta.-diketo compound with at least 9 carbon atoms, .beta.-keto carboxylic acid ester, .beta.-keto carboxylic acid amide, cyanoacetyl compound or .beta.-dicarboxylic acid ester with at least 13 carbon atoms as oilformer. The photographic material shows advantageous results i.a. with respect of stability of the emulsified substances in the layers and excellent sensitometric results.

Abstract: Positive color diffusion transfer images are produced by a process that employs light-sensitive photographic elements containing dye-releasing redox agents. The dye-releasing redox agents may be a sulfonamido compound or a hydroquinone derivative which are capable of cleaving to release a diffusible color-providing moiety. A preferred process involves the use of black-and-white developer compositions and comprises1. developing only a negative silver image in the imagewise exposed areas of the photographic element;2. fogging the residual silver halide;3. developing the residual silver halide in the fogged element to silver and concurrently releasing a diffusible dye or dye precurser in the non-image, fogged silver halide areas; and4. at least a portion of the diffusible dye or dye precurser compound diffusing to a dye image-receiving layer.

Abstract: In a method for developing, bleaching and fixing an exposed silver halide photographic material, the improvement which comprises bleaching the photographic material with a bleaching solution containing a ferric salt, then processing the photographic material with a solution containing an organic acid.

Abstract: reversal color images are produced in photographic elements which contain a ballasted primary aromatic amine and conventional ballasted color couplers. The photographic element is imagewise-exposed and a negative silver image is formed without forming a dye image. The residual silver halide in the photographic element is then fogged and developed to silver while concurrently forming a color dye image in the nonimagewise-exposed areas of the element. The developed silver is removed without removing the dye image.