Abstract: A method of processing a silver halide-containing photosensitive material for color photography includes the silver-removing step in which silver which is formed by reduction in the color developing step is oxidized by a bleaching agent and further changed into a soluble silver complex by the action of a fixing agent. In this process, bleaching is carried out in both a bleaching bath and a bleach-fixing bath, and fixing is effected in the bleach-fixing bath. In the bleach-fixing bath, a stream of bleach-fixing solution is brought into contact with the emulsion coating surface of the color photosensitive material at a higher flow velocity than that of a stream of bleach-fixing solution which is circulated in the bath.

Abstract: A method of forming a color image and a silver halide color photographic material comprising a reflective support having thereon at least one light-sensitive layer containing at least one coupler which forms a dye upon a coupling reaction with an oxidation product of an aromatic primary amine color developing agent and a silver halide emulsion which contains at least 80% by mol of silver chloride and substantially no silver iodide the method comprising processing with a color developing solution which contains not more than 0.002 mol of a bromine ion per liter and substantially no benzyl alcohol for a development time of not more than 2 minutes and 30 seconds in the presence of at least one compound represented by the following formulae (I), (II), or (III), as defined in the specification.The method of forming a color image and the silver halide color photographic material according to the present invention enable rapid processing to be conducted while controlling the fog formation with high sensitivity.

Abstract: A negative silver halide photographic material comprising a support and at least one silver halide emulsion layer on the support, the emulsion layer or other hydrophilic colloid layer containing a hydrazine derivative, wherein the photographic material further contains an acid polymer and in which the pH of the surface of the photographic material is not more than 5.8. Also, a method for forming a superhigh contrast negative image using the above photographic material is disclosed.

Abstract: In a process for the continuous treatment of silver halide color photographic light-sensitive materials with supplying a replenisher to a developing bath, the amount of the replenisher is 900 m or less per m.sup.2 of the light-sensitive materials, and the light-sensitive materials contain a certain type of mercapto heterocyclic compounds. Constant results in finished development and lower fog are attained and fogging during storage of raw light-sensitive materials is suppressed even when the amount of the replenisher is very small.

Abstract: A method of processing a silver halide photographic material comprising processing the silver halide photographic material in the presence of an antifoggant which is an organic compound which loses its developing restraining function by a reduction oxidation reaction with oxidized developers. The method improves the discrimination between image and non-image areas of the silver halide photographic material by the novel antifoggant which restrains fog selectively in non-image areas without decreasing photographic sensitivity and image density. The organic compound can be an anti-foggant which possesses a moiety according to the Kendall-Pelz rule and either a mercapto group or a cyclic NH group.

Abstract: A data card for optical information featuring a gelatin layer having a thin black crust at the top of the layer. The crust is formed by developed black irregular oblong silver particles within the top 0.5 micron of the gelatin colloid matrix. The remainder of the colloid matrix is substantially clear gelatin and a reflective metallic layer is disposed below the gelatin. The strip is laminated into a wallet-size card and may be pre-patterned during formation of the crust with control indicia or pre-recorded data. User data may be recorded by modifying the black silver particles in the crust with a laser to expose the reflective underlayer. A laser or other light source is used to read data on the medium with optical contrast between the black surface metallic layer underlying the gelatin layer which can be observed in the recorded spots.

Abstract: A novel process for the formation of a high contrast negative image is provided which comprises processing a silver halide photographic material with a developing solution, wherein said developing solution contains a dihydroxybenzene developing agent, a 1-phenyl-3-pyrazolidone auxiliary developing agent and/or p-aminophenol auxiliary developing agent, 0.3 mol/liter or more of sulfite, and a compound represented by formula (I) ##STR1## wherein Y and Z, which may be the same or different, each represents N or CR.sup.2 wherein R.sup.2 represents a substituted or unsubstituted alkyl or aryl group; R.sup.1 represents an alkyl, aryl or heterocyclic group which is substituted by at least one group selected from the group consisting of --SO.sub.3 M, --COOM, --OH, --NHSO.sub.2 R.sup.3, --SO.sub.2 NR.sup.3 R.sup.4 and --NR.sup.5 CONR.sup.3 R.sup.4 or a group formed by alkyl groups, aryl groups or heterocyclic groups via linkage groups; R.sup.3, R.sup.4 and R.sup.

Abstract: A process for processing a silver halide color photographic material which comprises processing, after color development, a silver halide color photographic material with a processing solution having a bleaching faculty using an aminopolycarboxylic acid ferric complex salt as an oxidizing agent, said color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and at least one compound releasing by the reaction with an oxidation product of a developing agent a group releasing or forming development inhibitor by the reaction with another molecule of an oxidation product of a developing agent.

Abstract: A silver halide photographic material for use in a bright room is disclosed comprising a support having thereon at least two silver halide emulsion layers, each of the emulsion layers having a different sensitivity and comprising silver chloride grains or silver chlorobromide grains having at least about 80 mol % silver chloride, each of the silver halide emulsions layers containing from about 1.times.10.sup.-7 mol to about 1.times.10.sup.-4 mol of a rhodium salt per mol of silver, wherein the sensitivity of the lower emulsion layer (the emulsion layer coated nearer to the support) is higher than the sensitivity of the upper emulsion layer (the emulsion layer coated farther from the support) and at least one of the silver halide emulsion layers or different hydrophilic colloid layers contains a hydrazine derivative and at least one of the silver halide emulsion layers of different hydrophilic colloid layers contains a dry compound having a .sup..lambda. max of from about 400 nm to about 550 nm.

Abstract: A silver halide photographic material for a bright room and a process for producing the photographic material are disclosed, wherein the silver halide photographic material for a bright room comprises a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol % silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the .gamma. value of the silver halide photographic material being at least 10.

Abstract: In a method for forming a direct positive color image which comprises image-wise exposing to light a light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer contaiing unfogged internal latent image type silver halide grains and a color image-forming coupler; developing the light-sensitive material with a surface developing solution containing an aromatic primary amine type color developing agent in the presence of a nucleating agent and/or fogging exposure; bleaching and fixing the resulting material to form the direct positive color image, the improvement is characterized in that the developing solution has a pH of 11.5 or less and does not substantially contain benzyl alcohol; the color coupler is a compound which forms or releases a substantially non-diffusive dye by oxidation coupling with a developing agent, and the internal latent image type silver halide grains have a particular core/shell structure.

Abstract: An optical recording media formed of a composite film the coloration of which changes when exposed to a focused laser to store multiple bits of information at a single spot. The media is formed by depositing a metal film on a substrate; oxidizing a layer of the metal film to form an amorphous film; and depositing a dielectric-like film on the amorphous film.

Abstract: A silver halide photographic material in which a silver iodobromide emulsion having an iodide content of 2 mole % or more and an organometallic salt functioning as a development inhibitor are employed in combination, whereby an improvements in graininess and sharpness of a developed image are achieved and high photographic speed is retained.A process for producing silver images using the silver halide photographic material is also disclosed.

Abstract: A silver halide photographic material which contains at least one blocked photographic reagent having in the molecule thereof at least one ##STR1## structure and capable of releasing a photogrpahically useful reagent by cleavage of the ##STR2## bond by a nucleophilic attack of a nucleophilic reagent on the structure and a subsequent intramolecular electron transfer reaction or an intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer. There is provided a photogrphic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer.

Abstract: The present invention, relates to a method for the bleaching-fixation processing of silver halide color photographic materials. The present invention provides for sufficient desilvering in a short period of time without deterioration of the photographic characteristic of the materials as processed while minimizing the amount of replenisher which is used. Accordingly, the present invention is a method for the processing of silver halide color photographic materials wherein, after the color-development, the material is processed by bleaching-fixation with at least two continuous bleaching-fixation baths to which a replenisher is fed in a countercurrent system, wherein the total bleaching-fixation processing time in the bleaching-fixation step is to be 0.37 minutes or more per g/m.sup.2 of the silver amount coated on the material and wherein the processing time in the first bleaching-fixation bath is to be 45% or less of the total bleaching-fixation processing time.

Abstract: A negative type silver halide photographic material and a method for processing the photographic material to form a super high contrast negative image are disclosed. The photographic material comprises a support and at least one emulsion layer on the support, said emulsion layer comprising silver halide grains comprising a core of silver halide containing silver iodide and a shell covering the core, said shell consisting essentially of silver bromide, silver chloride, or silver chlorobromide and having a thickness of from 0.01 to 0.08 .mu.m, wherein the emulsion layer or a hydrophilic colloid layer other than the emulsion layer of the photograpic material contains a hydrazine derivative.

Abstract: A negative type silver halide photographic material and a method for forming a super high contrast negative image using the photographic material are disclosed. The photographic material comprises a support, at least one silver halide emulsion layer on the support, and at least one light-insensitive colloid layer on the support, said emulsion layer or light-insensitive hydrophilic colloid layer containing a hydrazine derivative, and further contains the tertiary amine salt of an acid polymer.

Abstract: The present invention provides a process for preparing a negative image of high contrast comprising developing an exposed silver halide photographic material which is substantially a surface latent image-type material in the presence of a hydrazine derivative, wherein said material is processed with a water-soluble alkaline developer having a pH value of from 10.5 to 12.3 and at least comprising the following components (1) through (3):(1) a dihydroxybenzene-type developing agent;(2) 0.3 mole/liter (developer) or more of a sulfite preservative; and(3) from 0.01 to 0.30 mole/liter (developer) of a compound of formula (A) ##STR1## in which R.sub.2 represents an alkyl group having from 3 to 6 carbon atoms; R.sub.3 and R.sub.4 each represents an alkyl or hydroxyalkyl group having from 1 to 10 carbon atoms.The formed negative images are of high contrast and are almost free from silver stain. The sensitivity is high and the dot image quality is good.

Abstract: A process for processing silver halide photographic material is disclosed, which comprises development-processing a silver halide photographic material in the presence of a compound represented by formula (I) or a salt thereof with an inorganic or organic acid: ##STR1## wherein Z represents an atomic group of carbon atoms, nitrogen atoms, or a combination thereof forming a 5-, 6-, or 7-membered unsaturated heterocyclic ring, said unsaturated heterocyclic ring being optionally fused with a monocyclic or bicyclic aryl group;R.sup.0 represents ##STR2## R.sup.1 represents an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group;R.sup.2 and R.sup.3 each represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, an alkoxy group, a substituted alkoxy group, an amino group, or a substituted amino group;R.sup.4 represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; andR.sup.

Abstract: A process for processing a silver halide color reversal photographic light-sensitive material is disclosed, which comprises developing an imagewise exposed silver halide color reversal photographic light-sensitive material with a black-and-white developer containing at least one compound selected from the compounds of Group A, at least one compound selected from the compounds of Group B, and preferably further at least one compound selected from the compounds of Group C, whereinGroup A consists of organic heterocyclic compounds represented by formulae (A-I), (A-II), (A-III), and (A-IV) ##STR1## Group B consists of benzoimidazole, indazole, benzotriazole, benzooxazole and benzothiazole compounds, not containing a thiol group, a thioether bond, a thioketone group, or a disulfide bond.Group C consists of compounds represented by formulae (C-I) and (C-II). ##STR2## wherein the symbols are as defined in the appended claims.

Abstract: A novel photographic element is disclosed. The element comprises a light-sensitive element including a light-sensitive silver halide emulsion layer coated on a support, wherein said silver halide emulsion layer or other photographic layers contain at least one development inhibitor precursor represented by formula (I) ##STR1## wherein A represents a phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring group; L represents a chemical bond or divalent linking group; p and q each represents an integer of 1 or 2; and n represents 0 or 1.

Abstract: Disclosed are novel antifoggant precursors having the general formula (I) or (II) which are sufficiently stable in a wealkyl acidic medium, are markedly effective in restraining over-development fog and besides cause little loss of sensitivity: ##STR1## (wherein Y represents oxygen atom or ##STR2## X represents OR.sub.3 when Y is oxygen atom and R.sub.3 when Y is ##STR3## where R.sub.1 and R.sub.2 each represents hydrogen atom, alkyl group aryl group and R.sub.3 represents hydrogen atom, alkyl group or phenyl group; R.sub.4 -R.sub.6 each represent hydrogen atom, halogen atom, alkyl group, carboxyl group, alkoxycarbonyl group or phenyl group, R.sub.4 and R.sub.5 may form together a benzene ring; R.sub.7 represents hydrogen atom, alkyl group or phenyl group; and A represents a heterocyclic group of the mercapto antifoggant.) ##STR4## (wherein X, Y, R.sub.4 -R.sub.5 and A are the same as defined for the general formula (I) and R.sub.4 and R.sub.5 or R.sub.5 and R.sub.6 may form together a benzene ring.).

Abstract: An image-forming process is disclosed, which comprises exposing a silver halide color photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing tabular silver halide grains having a diameter-to-thickness ratio of 5 or more, subjecting the exposed photographic material to color development processing, then processing the photographic material in a bath mainly having a bleaching ability and successively in a bath having a bleach-fixing ability.

Abstract: Photographic elements and processes are described which employ a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; wherein:(a) the hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent,(b) the azo group formation causes the release of the photographically useful group, and(c) the released photographically useful group does not contain the linking group or the nitrogen atoms of the hydrazide moiety.

Abstract: A silver halide photographic material having on a support at least one hydrophilic colloid layer and at least one silver halide emulsion layer containing tabular silver halide grains having a grain diameter of at least 5 times the thickness of the grains and at least one compound represented by general formula (I) ##STR1## wherein R.sup.1 represents a methyl group and R.sup.2 represents an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group.

Abstract: A silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer and a surface protecting layer, said silver halide photographic light-sensitive material comprising photosensitive silver halide grains and internally fogged silver halide grains, said internally fogged silver halide grains having adsorbed thereon at least one compound represented by the formula (I): ##STR1## wherein X represents --O--, --NH-- or --S--, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen atom or a substituent, and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, which is bonded directly or through a divalent linkage group, to the aromatic nucleus.

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 method of processing a photographic material which contains a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent by ring cleavage of a 4- to 7-membered ring containing at least one carbonyl group in the presence of a hydroxylamine, whereby both high stability of the photographic material upon storage and timely release of the photographically useful agent upon processing are achieved.

Abstract: A silver halide photographic light-sensitive material is described, comprising at least one light-sensitive silver halide emulsion layer on a support, wherein the emulsion in said light-sensitive silver halide emulsion layer comprises a silver iodobromide emulsion containing 3 mol % or more of iodide, and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a polyoxyethylene type surface active agent and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a meso-ionic triazolium compound represented by formula (I) ##STR1## wherein X represents a sulfur ion or --N--R.sup.4, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represents a hydrogen atom or a substituted or nonsubstituted alkyl group, aryl group, or heterocyclic group, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 can together form a heterocyclic ring.

Abstract: A silver halide photographic light-sensitive material for obtaining a silver image comprising a water-impermeable support having at least one silver halide emulsion layer, and containing in association with the emulsion layer a compound selected from the group consisting of: (a) a compound represented by the following general formula (I): ##STR1## (b) a compound represented by the following general formula (II): ##STR2## and (c) a combination of a compound represented by the following general formula (III) and a compound represented by the following general formula (IV): ##STR3## (all the symbols are as defined in the appended claims), and a method of forming silver images using the above-defined silver halide photographic light-sensitive material, are disclosed.

Abstract: A method of developing silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally-fogged silver halide emulsion, in which the internally-fogged emulsion has internal fogging nuclei at a depth of 0.02.mu. or more below the surface of the grains is disclosed. The photographic material is developed in the presence of at least one compound selected from the group consisting of tetraazaindenes containing at least one mercapto group, purines containing at least one mercapto group, triazaindenes containing at least one mercapto group and pentaazaindenes containing at least one mercapto group, to increase photographic speed, contrast and maximum density as well as remove uneven stain.

Abstract: A photographic element comprised of a support having provided thereon at least one silver halide emulsion layer, the element containing a development inhibitor precursor, is disclosed. The development inhibitor precursor is a compound represented by following general formula (I): ##STR1## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; Q represents a naphthalene skeleton; R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, independently represent a hydrogen atom or a monovalent substituent; and n represents 1 or 2. The photographic element gives improved image quality particularly in the low Dmin area. The element can be processed over a wide range of different processing temperatures and has improved preservability.

Abstract: A color diffusion transfer photographic light-sensitive material comprising a support, at least one silver halide layer on the support, said emulsion layer being associated with a dye-providing compound, and an image-receiving layer on the same support as above or on another support, wherein said photographic light-sensitive material is able to provide a transferred dye image composed of a diffusible dye or its precursor released or derived from the dye-providing compound as a result of development under a strong alkaline condition in the presence of at least one meso ionic 1,2,4-triazolium-3-thiolate compound. In the present material, fog can be prevented efficiently without causing the problems of a reduction in sensitivity and a decrease in rate of development.

Abstract: A method for developing a silver halide photographic material in the presence of an amino compound represented by the following general formula (I) or the salt thereof to increase photographic speed and/or gamma without being attended by a concomitant increase in generation of fog: ##STR1## wherein R.sup.1 represents an alkyl group, an aryl group, an aralkyl group or a cycloalkyl group; R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group or an alkylcarbonyl group, or R.sup.2 and R.sup.3 may combine with each other and form a ring; and A represents a divalent aliphatic linkage group.

Abstract: This invention relates to nitrogen containing heterocyclic compounds represented by the general formula ##STR1## wherein Z is non-metallic atoms necessary to form a tetrazole, a benzotriazole or a benzothiazole, either substituted or unsubstituted, n is either 1 or 2 and R is alkyl or phenyl. The above mentioned compounds can be suitably used in a photographic material as a development inhibitor precursor.

Abstract: A silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally fogged silver halide emulsion is development-processed in the presence of at least one compound selected from the group consisting of compounds represented by the general formulae (I) and (II) and at least one azaindene having a mercapto group to exhibit high photographic speed, high contrast and high maximum image density:R.sub.1 --(R.sub.3).sub.l X}.sub.n R.sub.3 '--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aryl group, an aryl group, or a heterocyclic group; R.sub.3 and R.sub.3 ' each represents an alkylene group, an arylene group, a heterocyclic group; X presents ##STR1## R.sub.4 represents a hydrogen atom or --R.sub.5 --Y}.sub.m R.sub.5 '--R.sub.6 ; R.sub.5 and R.sub.5 ' have the same meanings as R.sub.3 and R.sub.3 '; R.sub.6 has the same meaning as R.sub.1 and R.sub.2 ; Y represents ##STR2## R.sub.7 has the same meaning as R.sub.1 and R.sub.

Abstract: Novel compounds which release thio- or selenourea moieties or derivatives thereof upon contact with aqueous alkaline compositions and are therefore useful in photographic applications. The compounds include, in addition to the thio- or selenourea moiety, a uracil blocking moiety and an anion.

Abstract: A method for processing a color photographic light-sensitive material by subjecting an exposed silver halide color photographic light-sensitive material to color development processing then to bleaching processing and fixing processing or to bleach-fixing processing, which process comprises using a ferric ion complex salt or a persulfate as a bleaching agent in the bleaching processing or bleach-fixing processing and incorporating a compound represented by the general formula (I) described below or a salt thereof in a bath of the bleaching processing or bleach-fixing processing or in a pre-bath thereof. ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom or a lower alkyl group; X represents a --NH.sup.3 R.sup.4 group, a --COOM group, a --SO.sub.3 M group or a hydroxy group; R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom or a substituted or unsubstituted alkyl group or R.sup.3 and R.sup.

Abstract: A photographic element comprised of a support having provided thereon at least one silver halide emulsion layer, the element containing a development inhibitor precursor. The development inhibitor precursor is represented by the following general formula (I): ##STR1## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R.sup.1 represents a hydrogen atom or a monovalent substituent; and R.sup.2 represents an organic ballasting group. The element is capable of providing color images having improved image quality particularly with respect to having a low density in the Dmin areas. The photographic element can be processed over a wide range of processing temperatures. Further, the element can be preserved for long periods of time without having a reduction in the density in the Dmax areas.

Abstract: This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety comprising a 1,3-sulfur-nitrogen group, said 1,3-sulfur-nitrogen group (a) being capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex, and (b) possessing an amide substituent on the carbon atom in the 2-position that undergoes an intramolecularly accelerated cleavage reaction following the cleavage of said 1,3-sulfur-nitrogen group, which moiety maintains said precursor in its colorless form at least until the 1,3-sulfur-nitrogen group undergoes said cleavage. In a further embodiment, the cleavage of the amide substituent following the cleavage of the 1,3-sulfur-nitrogen group is used to provide an imagewise distribution of a photographically useful reagent, which reagent may be, for example, a photographically active reagent.

Abstract: A silver halide light-sensitive photographic material comprises a support and a Lippmann emulsion layer on the support containing a silver halide and at least one compound of the following formula in a quantity of at least 3.5.times.10.sup.-3 mole per mole of the silver halide of the Lippmann emulsion layer: ##STR1## wherein Z represents an atomic group necessary to form a heterocyclic ring; Y is a hydrogen atom or --S--R.sub.1 group; R and R.sub.1 are each a hydrogen atom, an alkali-metal atom, ammonium or an alkyl group; X and X.sub.1 are each a divalent organic group; m and m.sub.1 are each 0 or 1; and n is an integer of up to 3, provided if n is 0, Y is --S--R.sub.1 group.The silver halide light-sensitive photographic material is developed in a developer containing at least 0.6 mole per liter of sulfurous ions.

Abstract: A redox release compound that is capable upon oxidation of releasing a silver ion complexing heterocyclic thio moiety enables reduction of the concentration of silver required in a photographic silver halide material comprising a combination of (i) photographic silver halide capable of forming a surface latent image, and (ii) a photographic silver halide capable of forming an internal latent image. The silver halide capable of forming an internal latent image preferably has lower photosensitivity than the silver halide capable of forming a surface latent image. The redox release compound preferably comprises a silver ion complexing 1,2,4-triazolium-3-thio moiety. An image is developed in such an exposed photographic silver halide element by means of a surface type silver halide developer.

Abstract: An optical information recording medium capable of recording optical information thereon by application of high density energy beams thereto, the recorded information being thereafter reproducible therefrom, comprising a base and a recording layer formed on the base, the recording layer comprising a fluorine phthalocyanine of the following formula and capable of absorbing light with a wavelength of 700 nm or more: ##STR1## where M represents a member selected from the group consisting of hydrogen, a metal, a metal oxide and a metal halide, X represents fluorine; and n is an integer from 1 to 16.

Abstract: The present invention deals with novel antifogging compounds and their use in a method of photographic reproduction comprising developing a photographic material having at least one exposed silver halide emulsion layer in the presence of a 1-phenyl-5-mercaptotetrazole compound wherein the phenyl group bears a substituent comprising at least one thioether function.

Abstract: Herein are disclosed a light-sensitive silver halide photographic material comprising a support and, coated thereon, a hydrophilic colloid layer or layers including a silver halide emulsion layer, at least one of said hydrophilic colloid layer or layers containing a 1H-tetrazolium compound, and an image-forming method which comprises processing a light-sensitive silver halide photographic material mentioned above.The light-sensitive silver halide photographic material and the image-forming method according to the present invention can provide a high contrast silver image and a clear dot quality.

Abstract: Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl;R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl;X is a middle chalcogen;Z represents the atoms completing an aromatic nucleus;n is an integer of 1 or 2; andM.sup..sym.n is a cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.

Abstract: There is disclosed a silver halide photosensitive material which contains in at least one of silver halide emulsion layers and colloid layers at least on antifoggant precursor compound represented by the general formula: ##STR1## wherein A, Z, R.sub.1 and R.sub.2 are the same as defined previously. This photosensitive material is stabilized against overdevelopment fogging.

Abstract: A process for the development of color photographic light-sensitive material is described. The process comprises color developing an exposed light-sensitive material in the presence of a compound of the general formula: ##STR1## wherein M is a hydrogen atom, an alkali metal atom, NH.sub.4 or a protective group for the mercapto group which undergoes cleavage by the action of an alkali; R is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and R' is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms. This process prevents the formation of color development fog without seriously reducing sensitivity.

Abstract: A process for development-processing a silver halide photographic light-sensitive material is described, comprising processing with a developing solution containing 0.1 mol/liter or more of sulfite ion and at least one compound represented by formula (I) ##STR1## wherein n represents an integer of from 2 to 6; each of R.sub.1 and R.sub.2 represents hydrogen or an alkyl group having from 1 to 6 carbon atoms; and M represents hydrogen or an alkali metal atom.According to the process, the generation of silver sludge and the formation of fog are prevented when a black-and-white photographic light-sensitive material is processed with a developing solution containing sulfates in a high concentration.

Abstract: Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl;R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl;X is a middle chalcogen.[.;.]. .Iadd.chosen from the class consisting of sulfur and selenium; .Iaddend.Z represents the atoms completing an aromatic nucleus;n is an integer of 1 or 2; andM.sup..sym.n is a cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.