Abstract: A photographic light-sensitive material comprises a support having thereon at least one silver halide emulsion layer. At least 70% of a total number of silver halide grains contained in the emulsion layer are regular crystal grains not having a twinning plane. At least 50 mol% of the regular grains are silver chloride. The regular crystal grains have a (111) crystal plane on 30% or more of a total grain surface and are chemically sensitized in the presence of a gold compound or sulfur and gold compounds.

Abstract: The present inventions relate to a processing method for processing, with a developing time of not more than 180 seconds, a silver halide color photographic light-sensitive material comprising a support, provided thereon, with at least one silver halide emulsion layer, and at least one emulsion layer containing silver iodo-bromide with not less than 0.5 mole% of silver iodine, in particular to an active processing method wherein, a light-sensitive material B not only containing silver iodo-bromide with an iodine content of not less than 0.5 mole% but also a magenta coupler and providing a maximum magenta density, after exposed, and being capable of only satisfying the maximum magenta dye density M of M<2.0 if exposed under specific conditions and then subjected to color developing of a duration of three minutes 15 seconds at 38.degree. C. with a specific developer solution, is capable of offering a maximum magenta density satisfying M.gtoreq.2.

Abstract: A process for the rapid development of imagewise exposed silver halide recording materials which contain on a layer support at least three light sensitive silver halide emulsion layers of different spectral sensitivity, with which a cyan coupler, a magenta coupler and a yellow coupler are in each case spectrally associated, comprising the following treatment steps:1. treatment of the photographic material with a solution I of a color developing agent or a salt thereof at pH 1 to 8 over a period of 1 to 10 seconds,2. treatment of the photographic material impregnated with the developing agent with an alkali-containing solution II at pH 10 to 14 over a period of 1 to 10 seconds.produces maximum color densities of the kind otherwise only obtained by conventional development over a period of 45 seconds.

Abstract: A color image-forming process is disclosed, which comprises imagewise exposing a silver halide color photographic material comprising a support having thereon at least one light-sensitive layer containing at least one coupler capable of forming a dye upon a reaction with an oxidation product of an aromatic primary amine color developing agent and a silver halide emulsion spectrally sensitized with a dye represented by the following general formula (I), (II) or (II), substantially excluding silver iodide, and containing about 80 mol % or more silver chloride, processing the exposed photographic material with a color developer, then processing it with a solution having a pH of not more than about 6.5 and having a bleaching ability within about 75 seconds: ##STR1## wherein the symbols have the meanings described hereinafter. A silver halide color photographic material to be processed in accordance with the method described above is also disclosed.

Abstract: A method of forming a color image wherein a color print original is printed on a printing color photographic material and the thus printed material is then subjected to color development to give a color print, which is characterized in that a band stop filter having a half width of the spectral transmittance curve of said filter in a wavelength range outside the region of the maximum spectral sensitivity wavelength (.lambda.max).+-.20 nm of at least one light-sensitive layer of the printing color photographic material is provided between the light source to be used in said printing step and the light-sensitive layer of said printing color photographic material, and in that a compound of a general formula (I):(C.sub.p).X (I)wherein C.sub.

Abstract: A color image is formed by imagewise exposing a color photosensitive material comprising at least a silver halide and a coupler and subjecting the material to intensified development with a processing solution containing a reducing agent and an intensifier. A substantially water-insoluble basic metal compound is previously contained in the silver halide based color photosensitive material, while the processing solution contains a compound capable of complexing reaction with the metal ion of the substantially water-insoluble basic metal compound to release a base.

Abstract: A method for processing a silver halide color photographic material which comprises, after color development of a silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and at least one compound capable of releasing, upon a reaction with an oxidation product of a developing agent, a compound which is capable of releasing a development inhibitor upon a reaction with another molecule of an oxidation product of a developing agent, treating said photographic material with a liquid having a fixing ability, followed by processing thereof while replenishing washing water or a stabilizing solution in an amount of from 2 to 50 times the amount carried over from the preceding bath per unit area of the silver halide color photographic material.

Abstract: Photographic compound (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement exhibits increased resistance to hydrolysis when the compound contains in a coupling position a coupling-off group represented by the formula: ##STR1## wherein Q, R.sub.q, R.sub.1, R.sub.2, R.sub.3, n and PUG are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process.

Abstract: Photographic compounds capable of releasing a photographically useful group (PUG) by means of an intramolecular nucleophilic displacement provide increased image acutance when a coupling-off group in the coupling position of the compound is a group of the formula: ##STR1## wherein PUG is a photographically useful group; Q is N or C--R where R is hydrogen or a substituent that does not adversely affect imaging; and Z represents atoms completing a non-aromatic, heterocyclic ring. The photographic compounds are useful in photographic materials and processes.

Abstract: A silver halide photographic material is described, comprising a support having provided thereon at least one silver halide photographic emulsion layer and comprising a bleach accelerator-releasing coupler, wherein said bleach accelerator-releasing coupler is represented by formula (I)A--(TIME).sub.n --S--X--(Y).sub.m --(Z)l]a (I)wherein A represents a coupler residual group; TIME represents a timing group; n represents 0 or 1; X represents a cyclic aliphatic group or a saturated heterocyclic group; Y represents an aliphatic group having from 1 to 8 carbon atoms which may contain a group of --O--, a group of --S--, a group of --COO--, a group of --CO--, a group of ##STR1## a group of ##STR2## a group of --SO.sub.2 --or a group of ##STR3## in its chain; m represents an integer of from 0 to 3, and when m represents 2 or more, the two or more Y groups may be the same or different; Z represents a group of --OH, a group of --COOM, a group of --SO.sub.

Abstract: A process for the manufacture of a relief element useful in liquid crystal display panels to control the gap-width of the liquid crystal layer, which process comprises the steps of:(I) pattern-wise photo-exposing a photographic silver halide emulsion material comprising on a support a single gelatin containing silver halide emulsion layer to form a latent pattern of exposed silver halide, and(II) treating the exposed silver halide emulsion layer with an aqueous solution containing a developing agent for said halide in the presence of a colorless coupling agent capable of forming with oxidized developing agent a diffusion resistant colorless reaction product increasing the thickness of said emulsion layer in the exposed regions.The treating step (II) can occur also in the presence of a color developing agent reactive with the oxidized developing agent to form a colored reaction product in the exposed regions.

Abstract: There is disclosed a method for processing a light-sensitive silver halide color photographic material in which a light-sensitive silver halide color photographic material having at least one silver halide emulsion layer is exposed imagewise to light and then subjected to processing including at least a color development treatment or a color development treatment followed by a bleach-fixing treatment, the improvement wherein said at least one silver halide emulsion layer is a silver halide emulsion layer in which not less than 80 mole % of the total silver halide in the layer is silver chloride and the pH value of the bleach-fixing solution used in said bleach-fixing treatment is in the range of 4.5 to 6.8.

Abstract: A method for processing a silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer and containing a magenta dye forming coupler represented by formula (I) shown below and a compound represented by formula (II) shown below in the same layer is described, wherein the silver halide color photographic material is subjected to color development using a replenisher for a color developing solution, whose concentration of bromide is not more than 3.times.10.sup.-3 mol per liter and the amount of the replenisher for a color developing solution is not more than 900 ml per m.sup.2 of the silver halide color photographic material, wherein ##STR1## wherein R.sub.1 represents an aromatic group, an aliphatic group or a heterocyclic group; R.sub.2 represents a substituent; Za, Zb, Zc and Zd, which may be the same or different, each represents an unsubstituted methine group, a substituted methine group or --N.dbd.; and formula (II) is represented by(R'--COO.sup.

Abstract: A color image is formed by subjecting a silver halide photosensitive material comprising at least a photosensitive silver halide, a two equivalent coupler, a binder, and a substantially water-insoluble basic metal compound on a support, to development with a processing solution comprising a complexing compound capable of complexing reaction with the metal in ionic form of said substantially water-insoluble basic metal compound in the presence of water to release a base.

Abstract: Disclosed is a method for processing a light-sensitive silver halide color photographic material, which comprises including at least the step of color developing, the step of processing with a liquor having fixing ability and the step of processing with a washing solution substitute as the final processing step, after imagewise exposure of a light-sensitive silver halide color photographic material containing at least one silver halide emulsion layer on a support, characterized in that at least one layer of the silver halide emulsion layer contains at least one coupler selected from the magenta couplers and the cyan couplers; washing solution substitute contains at least one compound selected from the group consisting of from 2.0.times.10.sup.-5 to 2.5.times.10.sup.-2 mol per liter of the washing solution substitute of the aldehydes, from 2.0.times.10.sup.-5 to 8.0.times.10.sup.-2 mol per liter of the washing solution substitute of the aldehyde derivatives and from 2.0.times.10.sup.-5 to 8.0.times.10.sup.

Abstract: A method for the formation of a color image is described, wherein a silver halide color photographic material comprising a photographic layer provided on a reflective support is imagewise exposed and then subjected to development for a period of time within 2 minutes and 30 seconds with a color developer which contains an aromatic primary amine developing agent but does not substantially contain benzyl alcohol, wherein said photographic layer contains at lesat one specific non-coloring coloration accelerator selected from the group consisting of compounds represented by formulae (I) through (VII) defined in the specification.

Abstract: A processing solution for developing a silver halide color photographic material. The material has a color developing agent and at least one compound selected from the group consisting of an aminocarboxylic acid and an aminophosphonic acid. The processing development solution has a surface tension ranging from 20 to 60 dynes/cm.

Abstract: A silver halide photographic material is disclosed. The material has at least one silver halide emulsion layer on a support, said silver halide emulsion layer containing a coupler which forms a mobile dye by coupling reaction with the oxidized product of a color developing agent, and said silver halide emulsion layer having in association therewith a non-light sensitive layer containing substantially non-light sensitive fine silver halide grains.

Abstract: A method of processing of a silver halide color photographic light-sensitive material is disclosed. The color photographic material to be processed comprises a support and photographic component layers including a blue-sensitive, green-sensitive and red-sensitive silver halide emulsion layers, and at least one of the photographic emulsion layers comprises a silver halide containing 0.5 to 25 mol % of silver iodide. The total thickness of the photographic component layers is from 8 to 25 .mu.m and the swelling rate T1/2 of this layers is not more than 25 sec. At least one of the emulsion layers contains a specific coupler. The color photographic material is processed with a bleach-fixing solution containing an organic acid ferric complex after a developing treatment.The processing by this invention provides high sensitivity and minimized cyan dye loss of the photographic material.

Abstract: A quick desilvering process of silver halide color photographic materials is provided, wherein the total amount of coated silver is 5.2 g/m.sup.2 or less, an average iodide content in the whole light-sensitive silver halide grains is 5.5 mol % or less; and a 2-equivalent magenta polymer coupler is included as a magenta coupler, and bleach-fixing treatment, or bleaching treatment at a pH of 5.5 or less, or desilvering treatment in the presence of a specific desilvering accelerator is carried out. Silver halide color photographic materials which permit the quick desilvering are also provided. These contain a specific desilvering accelerator.

Abstract: A color image-forming process is disclosed, which comprises imagewise exposing a silver halide photographic material comprising a reflective support having provided thereon at least one light-sensitive silver halide emulsion layer constituted by at least two kinds of monodispersed silver halide grains containing substantially no silver iodide and substantially deffering from each other in mean grain size, and developing the exposed photographic material for a developing time of within 2 minutes and 30 seconds using a color developer containing substantially no benzyl alcohol.

Abstract: A silver halide color light-sensitive material is described, which is increased in sensitivity, is adapted to form an image of high contrast, or is accelerated in development by incorporating a small amount of a specific compound which imagewise releases a foggant or a development accelerator. This compound is represented by the formula: Coup-(TIME).sub.n -FA (wherein Coup represents a coupler radical capable of undergoing a coupling reaction with an oxidized product of an aromatic primary amine developing agent; TIME represents a timing group which is eliminated from Coup by the coupling reaction and, thereafter, releases FA; n is 0 or 1; and FA represents a group which is eliminated from Coup in the coupling reaction when n is 0, whereas FA is released from TIME when n is 1. The FA has adsorption properties with respect to silver halide grains and also has a substantial fogging action with respect to the silver halide grains).

Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein the photographic light-sensitive material has a layer containing both a non-diffusible coupler which forms a properly smearing diffusible dye upon reaction with the oxidation product of a color developing agent and a silver halide emulsion in which a diameter corresponding to the projected area of grains that takes 40% or more of the projected area of whole silver halide grains is 1.5 .mu.m or more.The silver halide photographic light-sensitive material has improved graininess as well as has high sensitivity.

Abstract: A scavenger-spreader element adapted for use with a photosensitive element to form a negative image is disclosed as well as methods for processing said photosensitive element to produce the negative image. The scavenger-spreader element comprises a support carrying a hydrophilic layer, a cross-linking agent for the polymeric thickener of the photographic processing composition, a barrier layer to control diffusion of said cross-linking agent and a layer adapted to possess substantial adhesion for the cross-linked polymeric thickening agent.

Abstract: In the presence of a novel antifoggant represented by the general formula (I), a silver halide photographic material which has at least one light-sensitive silver halide emulsion layer on a support is development-processed. The developing solution is one containing both dihydroxybenzenes and 3-pyrazolidones, a developing solution containing both dihydroxybenzenes and aminophenoles, or a developing solution containing a primary aromatic amine developer to suppress markedly fog generation at much reduced sacrifice of sensitivity: ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, NH.sub.4 or a mercapto group-protecting moiety which can be split-off in the presence of an alkali; n represents 1, 2 or 3; R.sup.1 represents a hydrogen atom or --COOR.sup.2 ; and R.sup.2 represents a hydrogen atom, an alkali metal atom, NH.sub.4, or an unsubstituted or substituted alkyl, aryl or aralkyl group.

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer and a compound represented by the following general formula (I): ##STR1## wherein COUP represents a coupler residue capable of being subjected to a coupling reaction with an oxidation product of an aromatic primary amine developing agent; TIME represents a timing group which is released upon the coupling reaction and subsequently releases ##STR2## Z represents a monocyclic or condensed heterocyclic ring consisting of a nitrogen atom and a carbon atom; L represents a divalent linking group; R.sup.1 represents a hydrogen atom or an alkoxycarbonyl group; R.sup.2 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group, a thioacyl group or a thiocarbamoyl group; R.sup.3 represents a hydrogen atom; R.sup.2 and R.sup.

Abstract: A silver halide emulsion rich in chloride is described which has grains having a layered grain structure with a core and at least one layer encasing the core.

Abstract: A chloride-rich silver halide emulsion with grains having in the interior thereof a zone having a high bromide content is described.

Abstract: A photographic process for providing a silver image enhanced by the presence of a dye in which a substantially insoluble silver salt is formed from fixed silver prior to color development in the presence of a color coupler or a dye-forming developing agent.

Abstract: A photographic material suited for the production of (an) azine dye image(s), and having at least one silver halide emulsion layer and/or a separate layer in water-permeable relationship with such an emulsion layer which contains:(1) a heterocyclic hydrazone compound,(2) a phenol, naphthol or active methylene coupler compound capable of forming on oxidative coupling with compound (1) an azine dye,(3) an electron transfer agent or ETA-compound capable of forming a positively charged semiquinone on oxidation with exposed silver halide,(4) a reducing agent capable of reducing the thus-formed semiquinone in acidic medium, and having in the pH range of 2-5, a polarographic half-wave potential (E 1/2) which is at least 40 mV more negative (according to the European Convention) than the polarographic half-wave potential of the ETA-compound in the same pH range, said material being suited for processing with a simple aqueous alkaline liquid, and(5) an acidic medium.

Abstract: Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein certain polyamino stabilizing agents, such as N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of such stabilizing agents. Undesirable precipitate formation is also effectively avoided.

Abstract: A method for forming a color image comprising color developing a color photographic silver halide light-sensitive material containing at least one compound represented by formula (I) ##STR1## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and each of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is a hydrogen atom, an alkyl group, or an aryl group,using a color developer containing a p-phenylenediamine-based and/or p-aminophenol-based color developing agent and without performing black-and-white development.

Abstract: In a dye-forming imaging material comprising (a) a dye-forming coupler, and (b) an organic reducing agent that is capable in its oxidized form of reacting with the dye-forming coupler to form a dye, improvements are provided by a reducing agent that is a ureidoaniline silver halide developing agent free of strong electron withdrawing groups. Such an imaging material can be a photographic silver halide material. The imaging material can be a photothermographic material for producing a dye image comprising, in reactive association, (a) photographic silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image forming combination comprising (1) an organic silver salt oxidizing agent, and (2) an organic reducing agent for the organic silver salt oxidizing agent, wherein the reducing agent is a ureidoaniline which is capable in its oxidized form of reacting with the dye-forming coupler to form a dye.

Abstract: A process for forming a photographic image comprising imagewise exposing a silver halide photographic light-sensitive material to light and processing the silver halide photographic light-sensitive material with an alkaline processing solution, wherein the improvement comprises the silver halide photographic light-sensitive material contains a compound represented by formula (I) ##STR1## wherein R represents an alkyl group having from 6 to 22 carbon atoms, a substituted alkyl group having from 6 to 22 carbon atoms, an aryl group having from 6 to 22 carbon atoms, a substituted aryl group having from 6 to 22 carbon atoms, an alkenyl group having from 6 to 22 carbon atoms, a substituted alkenyl group having from 6 to 22 carbon atoms or an aralkyl group having from 7 to 22 carbon atoms; X represents an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a halogen atom; and n represents an integer from 1 to 3.

Abstract: Radiation is directed toward a support through an ordered array of lateral walls to form interlaid radiation-exposed and shadowed microareas on the support. A first composition is then located on the support in either the shadowed or unshadowed microareas. At least one additional composition is then positioned on the support in laterally displaced microareas forming an interlaid pattern with the first microareas.

Abstract: A process for the production of photographic color images by the silver dye bleach process, by exposure, silver development, dye formation, dye bleach, silver bleach and fixing of a photographic material which, in a light-sensitive silver halide emulsion layer or in an adjacent layer, contains, dispersed in oil, an oil-soluble triazene of the formula ##STR1## and an oil-soluble coupling component of the formula ##STR2## in which Ar.sub.1 is aryl or an aromatic heterocyclic radical, R.sub.1 is hydrogen, alkyl, aryl, hydroxyl, --(CH.sub.2 CH.sub.2 O).sub.r --L.sub.1 or --OL.sub.1, in which L.sub.1 is alkyl and r is 1, 2 or 3, or R.sub.1 is ##STR3## in which V is hydrogen or alkyl, and R.sub.2 is alkyl, aryl or --(CH.sub.2 CH.sub.2 O).sub.r --L.sub.1, or R.sub.1 and R.sub.2, conjointly with the nitrogen atom to which they are bonded, form a ring, A.sub.1 and A.sub.2 independently of one another are an amine of the formula --NT.sub.1 T.sub.2, in which T.sub.1 and T.sub.

Abstract: The present invention is directed towards a silver halide photographic material which has a reducing agent for silver halide or a precursor thereof and a compound M.sub.1 H.sub.m (PO.sub.n).sub.i.jH.sub.2 O which generates base when heat is applied. M is a metal from the Groups IA and IIA of the Periodic Table, 1 and i are individually integers from 1 to 3, m is an integer from 0 to 4, n is 3 or 4, and j is an integer from 0 to 12.

Abstract: Photographic silver halide material which comprises at least one silver halide emulsion layer coated on a support, there being present in the silver halide emulsion layer(s), or in a layer in operative contact with at least one silver halide emulsion layer, a compound of the formula ##STR1## wherein W is hydrogen, alkyl, --NHCOR.sup.1 or --COR.sup.1, wherein R.sup.1 is alkyl or alkenyl, cycloalkyl, aralkyl, aryl, phenoxymethylamino or halogen; X is a substituent in the coupling position and is a leaving group selected from hydrogen, chlorine, bromine, --SR.sup.11 wherein R.sup.11 is alkyl, aryl or a heterocyclic group, or X is a nitrogen-containing heterocyclic residue attached at a ring nitrogen atom; Y is a group having the formula ##STR2## wherein Q is selected from the residues: (a) --COOR.sup.4 or --CONR.sup.4 R.sup.5 where R.sup.4 is hydrogen, alkyl optionally interrupted by 1 or more oxygen atoms, alkenyl, cycloalkyl, aralkyl or aryl, and R.sup.5 is hydrogen or alkyl or R.sup.4 and R.sup.

Abstract: Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.

Abstract: A low priced multicolor optical filter having optical black and a process for producing the same are disclosed; the filter comprising a base having thereon one black-and-white silver halide emulsion layer in which at least two color dye patterns and at least one optical black area comprising silver or silver and a dye are formed.

Abstract: A method of forming dye images by processing a photographic material containing imagewise distributed catalyzer substance in the presence of hydrogen peroxide, a coupler and certain aromatic primary amine compounds.

Abstract: A process for producing a color filter plate is described, which comprisesforming a color filter pattern on a silver halide emulsion layer of a photographic material comprising a transparent support with the emulsion layer thereon, while the emulsion layer of areas to be removed is subjected to imagewise exposure, development and an etch-bleaching treatment to remove the emulsion layer of the areas,adhering a transparent plate to the emulsion layer, andabrading thereafter either the transparent support or the transparent plate to a desired thickness.

Abstract: A photographic recording material contains in a silver halide layer an emulsion mixture of at least one light sensitive silver halide and a comparatively non-light sensitive silver salt and in a second layer, which is in waterpermeable arrangement, an antifogging agent or a precursor compound thereof.

Abstract: Photographic elements, multicolor filters and receivers are disclosed having supports providing microvessels for materials such as radiation-sensitive materials, imaging materials, mordants, silver precipitating agents and materials which are useful in conjunction with these materials. Processes of forming microvessels and introducing materials therein are also disclosed. Processes of forming images are disclosed employing microvessel containing elements. Image transfer processes are disclosed for producing one or a combination of silver and multicolor subtractive primary images alone or in combination with multicolor additive primary images.

Abstract: The present invention is concerned with photographic products and processes employing certain pH-sensitive xanthene compounds as light-screening dyes, which compounds may be represented by the formulae ##STR1## wherein A and A', the same or different, are selected from ##STR2## each R is hydrogen or an electron-withdrawing group; each R.sup.1 is hydrogen or alkyl; each R.sup.2 is hydrogen, alkyl or an electron-withdrawing group; R.sup.3 is hydrogen or alkyl; R.sup.4 is alkyl; and n is 0 or 1 and which compounds in their colored, i.e., ring-opened form may be represented by the formulae ##STR3## wherein A, A', R.sup.3, R.sup.4 and n have the same meaning given above and Z is an anion.

Abstract: A process of developing a color photographic material with a color developer, a diphosphonic acid and a water soluble metallic salt of magnesium, aluminum, zinc, barium or zirconium.

Abstract: A method for processing an exposed color photographic material containing a color developing agent or precursor by developing with a color developer which is replenished.

Abstract: Photographic elements containing image-wise developable silver halide are developed in the presence of an oxathioether development activator according to the formula:R.sup.1 --A--(OCH.sub.2 CH.sub.2).sub.n --S--A'--(X--A").sub.m --Y--R.sup.2wherein:R.sup.1 is H, alkyl, hydroxyalkyl, or R.sup.2 --Y--(A"--X).sub.m --A'--S--,A, A', and A" is alkylene, with the proviso that A is a monovalent bond when R.sup.1 is hydrogen or alkyl or hydroxyalkyl,X is --OCO--, --SO.sub.2 --, --CONH--, or Y,Y is ligand or complexing function of the type of --S-- and --N(Q)-- (Q=H or alkyl),R.sup.2 is alkyl, which may be substituted by OH, or when Y is --N(Q)--, R.sup.2 together with Q may represent the atoms needed to complete a nitrogen-containing saturated ring,n is at least 2, and m is 0 or 1.The development activators can be used in black-and-white development or in color development. They can be incorporated in the photographic material or in the developing solution.

Abstract: A method for producing a multicolor optical filter, which comprises exposing a photographic material comprising a support and at least one black-and-white silver halide emulsion layer to light through a first pattern; developing the exposed emulsion layer with a first coupler-containing color developer to form a pattern of a first dye; then exposing an unexposed portion of said emulsion layer to light through a second pattern; developing the exposed area with a second coupler-containing color developer to form a pattern of a second dye; optionally repeating exposure and development to form patterns containing dyes of third and subsequent colors, thereby to form color patterns of at least two colors; and subjecting the product to a silver removal treatment after the final color development step.

Abstract: Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein a combination of sequestering agents, one of which is an aminopolyphosphonic acid compound and another of which is an aromatic polyhydroxy compound. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of this combination of sequestering agents. Undesirable precipitate formation is also effectively avoided.