Abstract: There is disclosed a direct positive silver halide light-sensitive material which can be processed in ultra-rapid processing and have a higher sensitivity, a lower Dmin, an excellent antistatic property and less flactuation of the properties in storing. The light-sensitive material contains an electron-accepting compound in a silver halide emulsion layer, and a fluorinated surfactant and/or at least one of the compounds represented by Formulas I-a to II-b in a photographic component layer: ##STR1## wherein R.sub.1 to R.sub.4 represent independently a hydrogen atom, a lower alkyl group, an alkoxy group, a carboxy group, an alkoxycarbonyl group, a sulfo group, a halogen atom, and a nitro group, provided that at least one of R.sub.1 and R.sub.2 is a carboxy group, an alkoxycarbonyl group or a sulfo group.

Abstract: Black-and-white continuous tone reproductions may be obtained under daylight conditions with a photographic recording material in which the silver halide consists to an extent of at least 75 mol % of silver chloride and has been prepared in the presence of a 1-phenyl-5-mercaptotetrazole compound. The material is particularly suitable for reprophotographic work, e.g. for the production of continuously graduated masks.

Abstract: A silver halide color negative photographic light-sensitive material is disclosed which is improved on stability to fluctuation of processing conditions applied thereon, and has a sufficient wide exposure latitude. The photographic material is also improved on standing stability of silver halide emulsion in the course of manufacturing thereof. The photographic material comprises a support having thereon photographic component layers including at least one silver halide emulsion layer containing at least two groups of silver halide grains each being substantially different in desensitizing agent content from each other.

Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a carbonyl coordination ligand and a transition metal chosen from groups 8 and 9 of the periodic table of elements.

Abstract: A silver halide black and white photographic material for printing a developed transparent color photographic material is disclosed, which comprises a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the emulsion layer is composed of a silver halide emulsion which maintains a spectral sensitivity substantially between 520 nm and 620 nm and contains substantially no iodine.

Abstract: A photographic element is disclosed for handling under a first radiation source and imagewise exposure to a second radiation source having a solid particle dispersion filter dye layer that absorbs radiation emitted to which the element is sensitive emitted by the first source.

Abstract: A silver halide light-sensitive photographic material having an improved safe-light insensitivity and, therefore, capability of being easily handled in the light room is disclosed. The material comprises a support; at least one silver halide emulsion layer being provided on one side of the support and containing silver halide grains containing at least 50 mol % of silver chloride, 10.sup.-4 to 10.sup.-8 mol per 1 mol of silver halide of a rhodium salt and a desensitizing dye; and at least one hydrophilic colloidal layer being provided on the other side of the support and containing at least one dye so that the absorbancy of the dye at the maximum spectral sensitivity wavelength (.lambda.max) of the densenitizing dye is not less than 0.3 and the absorbance ratio at the maximum spectral sensitivity wavelength against that at 450 nm is not less than 0.2.

Abstract: A silver halide photographic light-sensitive material is disclosed, which is suitable for contact printing in photomechanical process and capable of being handled in daylight room. The light-sensitive material comprises a support having thereon a silver halide emulsion layer containing a silver halide emulsion and a hydrazine compound or a tetrazolium compound, a layer being provided on the surface of said emulsion layer farther from said support and containing a compound having a maximum spectral absorption at a wavelength of at least 50 nm longer than that of the maximum spectral sensitivity of said silver halide emulsion, and a layer being interposed between said support and said emulsion layer and containing a macromolecular compound having a heterocyclic group having a sulfo group or an alkylsulfo group. The light-sensitive material is excellent in reverse-text quality and inhibited in formation of pin-holes.

Abstract: A compound of the general formula (I): ##STR1## (in which EAG represents an electron accepting group; R.sup.1 and R.sup.2 each represents a substituent except hydrogen; and R.sup.1 and R.sup.2, R.sup.1 and EAG, and R.sup.2 and EAG may be bonded together to form a ring) is incorporated into a silver halide photographic material. The compound of the formula (I) becomes oxidative after cleavage of the nitrogen-oxygen single bond in the molecule, and the compound displays an action as an antifoggant, a stabilizer and/or a black spot preventing agent in the photographic material.

Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains containing greater than 50 mole percent chloride and less than 5 mole percent iodide, based on total silver, with any residual halide being bromide, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands. The emulsions exhibit increased sensitivity.

Abstract: An ultra-high contrast silver halide photographic material which is suitable for daylight use and which has at least one silver halide emulsion layer on a support, wherein the emulsion layer contains cubic silver halide grains having a mean grain size of 0.15 .mu.m or less and containing silver chloride in an amount of 99 mol % or more. The material can contain a rhodium salt or an organic desensitizer for lowering the sensitivity while maintaining the high contrast photographic property thereof.

Abstract: Photographic emulsions are disclosed comprised of radiation sensitive silver bromide grains optionally containing iodide. The grains exhibit a face centered cubic crystal lattice structure and are formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands.

Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a nitrosyl or thionitrosyl coordination ligand and a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements.

Abstract: A silver halide photographic material that has a photographic emulsion layer formed on a support comprising paper base coated with a resin on both sides is disclosed. In this photographic material, a hydrophilic colloidal layer containing a material that has an absorption in the wavelength region in which the photographic emulsion layer has sensitivity is provided between the emulsion layer and the support. The surface of the support on the side where the hydrophilic colloidal layer is to be coated has a center-line-average roughness, Ra, of 0.3-1.5 .mu.m, and the thickness of this hydrophilic colloidal layer is at least one half the center-line-average roughness, Ra, of the surface of said support. This photographic material has the advantage of imparting improved sharpness and a high degree of whiteness, as well as high sensitivity.

Abstract: A silver halide light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, and containing a compound containing a repeating unit, said compound containing a repeating unit being connected at the repeating unit to a compound represented by formula (I) at the position of the PWR or Time moiety:PWR--Time.sub.t PUG (I)wherein PWR represents a moiety capable of releasing (Time.sub.t PUG upon reduction, and PUG represents a group which can fulfil a photographically useful function after the release; Time represents a moiety capable of releasing PUG through a reaction subsequent to the release from PWR in the form of --Time.sub.t PUG; and t represents 0 or 1.

Abstract: An ultra-high contrast silver halide photographic material which is suitable for daylight use and which has at least one silver halide emission layer on a support, wherein the emulsion layer contains cubic silver halide grains having a mean grain size of 0.15 .mu.m or less and containing silver chloride in an amount of 99 mol % or more. The material can contain a rhodium salt or an organic desensitizer for lowering the sensitivity while maintaining the high contrast photographic property thereof.

Abstract: A direct positive light-sensitive silver halide photographic material having at least one silver halide emulsion layer containing at least two kinds of internal latent image type silver halide grains not previously fogged and having the same spectral sensitivity, and capable of obtaining a direct positive image by effecting surface development while applying and/or after applying overall exposure after imagewise exposure; wherein said at least two kinds of internal latent image type silver halide grains have different sensitivity from each other and at least one of silver halide grains having lower sensitivity is desensitized with use of an organic or inorganic desensitizer, and a method of use of the direct positive light-sensitive silver halide photographic material for carrying out development at a higher temperature.

Abstract: A superhigh contrast negative type silver halide photographic material, comprising a support having provided thereon at least one silver halide emulsion layer, wherein the emulsion layer or at least one other hydrophilic colloid layer contains at least one hydrazine derivative and at least one organic desensitizer having at least one water-soluble group or alkali-dissociative group. The material has a reduced sensitivity suitable for processing in a bright room while enjoying the effect of the hydrazine derivative to increase contrast.

Abstract: A silver halide photographic light-sensitive material is disclosed, which has high sensitivity and can be handled under bright safelight. The photographic material comprises a support bearing thereon photographic component layers including at least one silver halide emulsion layer containing a silver halide emulsion sensitized so as to have a maximum spectral sensitivity on the side of a wavelength shorter than at least 600 nm and at least one non-light-sensitive hydrophilic colloid layer arranged to the side of the silver halide emulsion layer opposite to the support. And at least one of the hydrophilic colloid layers contains a water-soluble dye having a maximum light-absorption within the wavelength region of not less than 700 nm.

Abstract: There is disclosed a silver halide photosensitive material for use under room-light wherein at least one silver halide emulsion layer contains (1) a spectrally unsensitized negative silver halide having an average grain size of 0.1 to 0.3 .mu.m and containing at least 80 mol % of silver chloride and (2) an organic desensitizer having an anodic polarographic potential and a cathodic polarographic potential which give a positive sum and this photosensitive material satisfying at least one of the following requirements:(a) said emulsion has undergone substantially no chemical ripening;a spectrally non-sensitizing dye capable of absorbing chiefly the rays in the range of from about 500 to 600 nm is contained in at least one of said photographic layers; and(c) at least one of the compounds from (i) to (v) as disclosed in the specification is contained in said emulsion layer.

Abstract: A silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing a compound represented by formula (I): ##STR1## wherein EAG represents an aromatic group bonding to N.sub.A and capable of accepting an electron;N.sub.A and N.sub.B each represents a nitrogen atom;R.sup.1 represents a lone pair, a .pi.-bond, a .sigma.-bond, or a substituent other than a hyudrogen atom;n represents 2 or 3;m represents 0 when n represents 2, or m represents 1 and N.sub.B has a positive charge when n represents 3;X.sup..crclbar. represents an anion;the groups or bonds represented by R.sup.1 may be combined with each other or may be combined with EAG to form a ring;R.sup.2 represents R.sup.3 --CO--, R.sup.3 --SO.sub.2 --, R.sup.3 --CO--N.dbd.CH--, or R.sup.3 --SO.sub.2 --N.dbd.CH--, wherein R.sup.3 represents an alkyl group, an aryl group, or a heterocyclic group;the group represented by R.sup.2 may be combined with at least one of R.sup.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, at least one layer of the silver halide photographic material comprising at least one compound represented by formula (I):PWR--Time--.sub.t --POL (I)wherein PWR represents a group capable of releasing (Time--.sub.t POL upon reduction; Time represents a divalent organic group capable of releasing POL via a subsequent reaction after (Time--.sub.t POL is released from PWR; t is 0 or 1; and POL represents a polymer group.The compound represented by formula (I) is a useful functional polymer whose properties are drastically changed upon reduction and reveal photographically useful function.

Abstract: UV-sensitive direct positive silver halide photographic elements for duplicating processes which can be safely handled under white light, said elements comprising a support base, a hydrophilic colloidal silver halide emulsion layer comprising fogged silver halide grains, and one or more hydrophilic colloidal layers, wherein said silver halide emulsion is reactively associated with a water-removable UV-absorbing compound having at least 80% of the absorption in the range from 350 to 400 .mu.m.

Abstract: A silver halide photographic material which may be handled in a bright room, which comprises a support having provided thereon at least one silver halide emulsion layer containing silver chlorobromide grains (bromide content: not more than 20 mol %) or silver chloride grains, said emulsion layer containing 1.times.10.sup.-7 mol to 5.times.10.sup.-4 mol of a rhodium salt per mol of silver, and said emulsion layer or at least one other hydrophilic colloid layer containing at least one hydrazine derivative represented by the following general formula (I): ##STR1## wherein R represents an organic group having 1 to 30 carbon atoms; A represents a substituted or unsubstituted phenylene group or a substituted or unsubstituted naphthylene group; X represents --NH--or --O--; L.sub.

Abstract: A process for manufacturing a silver halide direct positive type emulsion comprising primarily silver bromide prepared in the presence of a water-soluble rhodium salt said process comprising; simultaneously adding and mixing a silver aqueous solution and a halide aqueous solution to form an aqueous solution containing a hydrophilic colloid, said resultant mixture having a silver potential maintained with a range of from 100 mV to 200 mV, the speed at which the solutions are added being not more than the critical growth speed of existing silver halide grains, and fogging said silver halide grains.

Abstract: A method for the production of a photographic image by silver complex diffusion transfer processing wherein a negative working silver halide emulsion material having particularly high exposure latitude and being manipulatable under room light conditions without prohibitive fogging is used, said material having a low intensity reciprocity failure (L.I.R.F). The material is contact-exposed with visible light through a sheet support carrying paper paste-up material with its information facing the silver halide emulsion layer of the photographic material, and the resulting latent image is developed in the presence of a silver halide complexing agent and the thus developed silver halide emulsion material is contacted with an image-receiving material to form according to a preferred embodiment a planographic printing plate.

Abstract: A photographic silver halide emulsion is disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure and internally containing rhenium ions.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer; wherein said emulsion layer comprises a silver chloride emulsion or a silver chlorobromide emulsion containing 90 mol % or more silver chloride, which is prepared in the presence of a water-soluble rhodium salt in an amount of 1.times.10.sup.-7 to 2.times.10.sup.-5 mol per mol of silver halide; and wherein at least one of said emulsion layer and hydrophilic colloidal layers of said material contains a dye compound represented by formula (I) ##STR1## wherein: R.sub.1 represents an alkyl group, an alkoxy group, a hydroxy group, an amino group, a substituted amino group, an alkoxycarbonyl group, a carboxy group, a cyano group, a carbamoyl group, a sulfamoyl group, an ureido group, a thioureido group, an acylamido group, a sulfonamido group or a phenyl group, Q represents a sulfoalkyl group, a sulfoalkoxyalkyl group, or an aryl group having at least one sulfo group; R.sub.

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: The present invention provides silver halide photographic materials containing a havel compound, which when reduced, releases a photographically useful group as triggered off by the cleavage of the nitrogen-oxygen single bond in the compound and which is represented by the following general formula (I): ##STR1## wherein EAG represents a group which accepts an electron from a reducing substance; N and O each represents nitrogen atom and an oxygen atom, respectively; R.sup.1 and R.sup.2 each represents a substituent other than a hydrogen atom, and when R.sup.1 or R.sup.2 is bonded to --(Time).sub.t PUG, R.sup.1 or R.sup.2 is a mere bond or a substituent other than a hydrogen atom, and R.sup.1 and R.sup.

Abstract: A silver halide photographic material which has at least one silver halide emulsion layer comprising silver chloride or silver chlorobromide grains which has a bromide content of 5 mol % or less, and containing a rhodium salt in an amount of from 1.times.10.sup.-6 to 5.times.10.sup.-4 mole per mole of silver in said layer, and contains both a hydrazine derivative and a dye having an absorption peak in the wavelength region of from 400 nm to 550 nm in at least one of said emulsion layer another hydrophilic colloid layer, to thereby control the ratio of sensitivity at 360 nm to sensitivity at 400 nm (S.sub.360 /S.sub.400 ratio) to not less than 30, thereby achieving ultra-high contrast, high sensitivity, and a satisfactory aptitude for safelight.

Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a monodisperse silver halide emulsion of 0.30 .mu.m or less in average silver halide grain size containing at least 75 mol % silver chloride and 2 mol % or less silver iodide, and having incorporated in said emulsion a dye represented by the formula (I) ##STR1## wherein Z represents atoms forming a thiazoline nucleus, a thiazole nucleus, or a benzothiazole nucleus,X represents an oxygen atom or a sulfur atom, andR.sub.1 and R.sub.2 each represents an unsubstituted or substituted aliphatic group or an unsubstituted or substituted aromatic group.

Abstract: Disclosed is a negative fine grain silver halide photographic emulsion capable of afford hard tone and high D.sub.max and have a markedly higher sensitivity than convertional roomlight handlable light-sensitive materials and free from defects such as fogging and decrease in sensitivity under roomlight conditions. This emulsion contains at least 70 mol % of silver chloride and an organic desensitizer which has an anodic polarographic potential and a cathodic polarographic potential which when added together give a positive sum, the amount of said organic desensitizer being such that necessary to reduce the sensitivity of said emulsion by not more than log E=1.3 (log E=1.0 in the case of silver chloride). This emulsion may further contain a rhodium salt.

Abstract: A process for preparing a silver halide emulsion wherein a sulfur-containing silver halide solvent which accelerates growth of silver halide grains and an oxidizing agent capable of reducing or eliminating the grain growth effect of the sulfur-containing silver halide solvent are used, and a silver halide photographic light-sensitive material containing the silver halide emulsion prepared by the process are disclosed. The grain growth effect of the sulfur-containing silver halide solvent can be controlled at any necessary stage without accompanying substantial deterioration in photographic properties.

Abstract: Photographic elements and assemblages are described which employ nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds which are capable of releasing photographically useful groups in an imagewise manner as a function of silver halide development.

Abstract: Photographic elements and assemblages are described which employ nondiffusible compounds which release photographically useful groups in an imagewise manner as the result of a .beta.-elimination reaction.

Abstract: A method of preparing a silver halide photographic emulsion comprising silver chloride as a principal component, which comprises adding to an aqueous solution of a hydrophilic colloid, an aqueous solution of a water-soluble silver salt and an aqueous solution of a water-soluble halide according to a simultaneous mixing method, and maintaining the rate of addition of the aqueous solution of a water-soluble silver salt and that of the aqueous solution of a water-soluble halide at a level not higher than the critical growth rate of silver halide grains and, at the same time, setting and maintaining the EAg value during the addition of the aqueous solution of a water-soluble silver salt and the aqueous solution of a water-soluble halide to a level not lower than 130 mV and not higher than 160 mV, said silver halide photographic emulsion being prepared in the presence of a water-soluble rhodium salt which is added during the course of emulsification and physical ripening of the emulsion.

Abstract: Silver halide photographic material for radiography comprising a transparent support having a hydrophilic colloid layer coated on each side thereof said layer comprising (a) photosensitive silver halide grains, (b) silver halide grains having surfaces covered with a solubility reducing agent and which, in the absence of said solubility reducing agent, are more soluble in a material capable of dissolving silver halide than said (a), said (b) having a sensitivity to light generally less than 1/10 that of said (a), and (c) physical development nuclei, wherein the molar ratio of (a) to (b), based on the silver content of each, is between 1:0.1 to 1:0.8 on each side of said support and the total silver content of (a) and (b) is from 1 to 8 g/m.sup.2.

Abstract: A direct positive silver halide material is disclosed. The material is comprised of a support base having a silver halide emulsion layer thereon which contains at least one phenazine series compound represented by the general formula (I), (II) or (III) and at least one compound represented by the general formula (IV), (V) or (VI). The structural formulae are shown within the specification wherein their substituents are defined. By including one compound of each of these groups within the material the resulting material provides images with a reduced minimum density without reducing the contrast of the images formed.

Abstract: Isoindoline derivatives monosubstituted in the 1-position corresponding to the general formula ##STR1## in which the cyclic radical R is an aromatic ring, a substituted aromatic ring, a tetrahydrogenated aromatic ring, a nitrogen-containing heterocyclic ring, or a sulfur-containing heterocyclic ring, and R.sub.1 is a substituent represented by the general formula ##STR2## where Y is an atom of oxygen, nitrogen, sulfur, or carbon, Z is the atom or atoms necessary to form a 5-membered or 6-membered heterocyclic ring which may have a fused-on aromatic ring selected from phenyl and naphthyl groups, R.sub.2 is an alkyl, sulfoalkyl, or carboxyalkyl radical, and X.sup.- is the anion for the cationic quaternary nitrogen. The derivatives are dyes having hydrophilic properties. They are useful for dyeing and printing textile fibers and for photographic applications.

Abstract: Direct positive silver halide photographic materials comprising a support, a silver halide emulsion layer comprising fogged silver halide particles prepared in the presence of a water soluble iridium salt or a water soluble rhodium salt, and a hydrophilic colloidal layer comprising (a) a compound selected from Formula I and II and (b) at least one compound selected from the group consisting of Formula III and a gold compound, said Formula I being ##STR1## wherein R.sub.1 is hydrogen, alkyl, --SO.sub.3 M, or --COOM, wherein M is selected from hydrogen, alkali metals, and ammonium, and R.sub.2 is selected from hydrogen and lower alkyls, said Formula II being ##STR2## wherein R.sub.3 is selected from hydrogen, alkyl, --SO.sub.3 M, and --COOM, and R.sub.4 is selected from hydrogen, alkyl, and --CH.sub.2 --S--(CH.sub.2).sub.n --Y', wherein n is an integer of from 1 to 3, and Y' is selected from hydrogen and --SO.sub.3 M, and said Formula III beingH.sub.2 N--Y--NH--Y].sub.m NH.sub.

Abstract: A method for producing a photographic emulsion is disclosed. The method includes the process of adding a dispersion of a substantially water-insoluble photographic additive to a photographic emulsion. The dispersion being prepared merely by mechanically grinding and dispersing the photographic additive in a form of fine grain having a size of 1.mu. or less in an aqueous system adjusted to a pH value of 6 to 8 and controlled to a temperature of 60.degree. to 80.degree. C. The additive is included in the photographic emulsion without the need of an organic solvent. The emulsion of the invention can be easily and quickly coated to form a uniform layer.

Abstract: Many photographic materials must be handled under special lighting conditions in order to prevent exposure of the material. The use of large concentrations of bleachable light absorbing layers over the photosensitive emulsion tends to leave an undesirable residual stain. The inclusion of a specific class of low intensity reciprocity failure inducers to silver halide emulsions enables the emulsions and their photographic articles to be safely handled under white light conditions.

Abstract: Small amounts of radical traps resorcylaldehyde oxime and 2,2-diphenyl-1-picrylhydrazyl and organic oxidants 2-chloro-5-nitrobenzylchloride, p-nitro-o-chlorobenzyl thiosulfate and 2-(p-nitrobenzyl)thiopyridinium bromide reduce the fog and stabilize the aging of medical X-ray emulsion with little or no effect on speed.

Abstract: A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula: ##STR1## wherein: R.sup.10 and R.sup.20 (same or different)(1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form,(2) represent an aryl group including a substituted aryl group, or(3) represent a heterocyclic ring residue including such residue in substituted form, orR.sup.10 and R.sup.20 are ringclosed, either R.sup.10 or R.sup.20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid;L.sup.1 and L.sup.2 (same or different) represent a ##STR2## --SO.sub.

Abstract: A photographic element containing a compound represented by formula (I) ##STR1## wherein G represents --OR.sup.1 or --NHR.sup.2, R.sup.1 represents hydrogen or a hydrolyzable moiety, R.sup.2 represents hydrogen or an alkyl group containing from 1 to 50 carbon atoms, Z represents a photographically useful group, A represents an atomic group forming an aromatic ring, Ball represents an organic immobilizing group on the aromatic ring, which cntains from 8 to 50 carbon atoms, m represents an integer of 1 or 2, X represents a divalent organic group, Nu represents a nucleophilic group, and n represents an integer of 1 or 2, and X with the nucleophilic group Nu is capable of forming a 5- to 12-membered ring by oxidation having an electrophilic center at the carbon atom substituted by the --NHSO.sub.2 Z group.

Abstract: A silver halide photographic material having a hydrophilic colloid layer comprising fine polymer particles loaded with a hydrophobic photographic addenda provided on a support wherein the polymer has repeating units formed from a nonionic hydrophobic monomer. The nonionic hydrophobic monomer has the formula ##STR1## R.sub.1 and R.sub.2 individually are a hydrogen atom or methyl group, R.sub.3 is a hydrogen atom, an alkyl or aryl group, and m and n are integers of from 2 to 100 individually.

Abstract: Photosensitive silver halide emulsions are provided with enhanced stability by the following sequence of steps:(a) providing sufficient stabilizer to the emulsion to stop chemical ripening but insufficient to interfere with spectral sensitization;(b) spectrally sensitizing said emulsion; and(c) adding to said emulsion a water soluble bromide salt, 1-phenyl-5-mercaptotetrazole; and a stabilizer selected from the group consisting of an hydroxy triazaindene, an amino triazaindene, an hydroxy tetrazaindene, an amino tetrazaindene, an hydroxy pentazaindene and an amino pentazaindene.

Abstract: Photographic negative material which has at least one layer which contains a desensitized silver halide emulsion, the desensitizer used being a trinuclear heptamethinecyanine or a halogenated trinuclear tetramethinecyanine which has three identical heterocyclic ring systems, which can have different substituents and are linked to one another by three identical methine systems, which can be mesomeric, is suitable for processing in subdued daylight but nevertheless has an adequate sensitivity on exposure to intense light.