Abstract: Vinyl sulfone and/or .beta.-halo sulfone compounds have been found to improve fog stability on shelf aging of photothermographic imaging elements. These elements comprise a photosensitive silver halide, silver salt oxidizing agent and reducing agent for silver ion in a binder.

Abstract: A silver halide light sensitive photographic material is disclosed, comprising a support having thereon hydrophilic colloid layers including a silver halide emulsion layer, wherein (i) at least 50% of the total projected area of silver halide grains contained in the emulsion layer is accounted for by tabular grains having an aspect ratio of 3 to 15, (ii) the tabular grains each comprising an inner region which accounts for 70% by volume of the grain and a residual outer region, the outer region containing at least 75% of total iodide contained in the grain, and (iii) the tabular grains each having an outermost layer, a halide content distribution among the tabular grains with respect to the outermost layer being not more than 20%; and wherein at least one of the hydrophilic colloid layers contains a sulfur containing compound, which has a water-solubilizing group.

Abstract: A photothermographic material contains an organic silver salt, a photosensitive silver halide, a reducing agent, a binder, and a compound of the formula: X--L.sub.1 --D wherein D is an electron donative group of atoms, X is an adsorption promoting group to silver halide, and L.sub.1 is a valence bond or a linking group. It has high sensitivity in the red to infrared region and experiences a minimal change of photographic properties under different developing conditions.

Abstract: A silver halide photographic material is described, which contains at least one compound represented by the following formula (I) and at least one compound represented by the following formula (II): ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents an aryl group or a heterocyclic group; R.sub.1 and R.sub.2 each represents an alkyl group; M.sub.1 represents a counter ion for charge balance; and m.sub.1 represents a number of 0 or more necessary for balancing a charge in the molecule of the compound; ##STR2## wherein either Z.sub.1 or Z.sub.2 represents an oxygen atom and the other represents a sulfur atom; V represents a monovalent substituent; R.sub.3 and R.sub.4 each represents an alkyl group; M.sub.2 represents a counter ion for charge balance; and m.sub.2 represents a number of 0 or more necessary for balancing a charge in the molecule of the compound.

Abstract: A silver halide photographic material is described which contains at least one compound represented by the following formula (I) and at least one compound represented by the following formula (II): ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group; W represents a hydrogen atom, a methyl group or an ethyl group; V.sup.1, V.sup.2, V.sup.3 and V.sup.4 each represents a hydrogen atom, a fluorine atom, a chlorine atom, an alkoxyl group, a hydroxyl group or a carboxyl group; X.sup.1 represents a counter ion; and m represents a number of 0 or more necessary for neutralizing a charge in the molecule; ##STR2## wherein R.sup.3 and R.sup.4 each represents an alkyl group, and at least one of R.sup.3 and R.sup.4 represents a carboxyalkyl group or an alkanesulfonylcarbamoylalkyl group; Z represents a hydrogen atom, a methyl group or an ethyl group; Y represents an aryl group or a heterocyclic group; V.sup.5 and V.sup.

Abstract: A color photographic silver halide material having a support and at least one silver halide emulsion layer containing couplers, which layer contains as couplers a 2-equivalent magenta coupler and both at least one compound of the formula (III) and at least one compound of the formula (IV): ##STR1## in which R.sub.4 means H, alkoxy or alkylmercapto,R.sub.5 means alkyl, halogen or R.sub.4,R.sub.7 means OH, NHCHO, NHCONH-alkyl, CO-alkyl, COOH, COO-alkyl, CONH.sub.2, SO.sub.3 H, SO.sub.2 NH-alkyl, CH.sub.2 CH.sub.2 COOH andR.sub.7 means H, alkyl, halogen, OH or alkoxyis distinguished by improved pressure sensitivity.

Abstract: A photothermographic recording material comprising a photo-addressable thermally developable element including a substantially light-insensitive organic silver salt, photosensitive silver halide in catalytic association with the substantially light-insensitive organic silver salt, in a quantity of 0.1 to 35 mol % relative to the organic silver salt and spectrally sensitized to infra-red light with a dye, a supersensitizer for the dye, a reducing agent in thermal working relationship with the substantially light-insensitive organic silver salt and a binder, wherein the binder comprises a water soluble polymer, a water-dispersible polymer or a water soluble polymer and a water-dispersible polymer and the dye is represented by formula (I): ##STR1## wherein Z.sup.1 and Z.sup.2 independently represent S, O or Se; R.sup.1 and R.sup.

Abstract: A photosensitive element which comprises on a support at least one photosensitive silver halide emulsion layer and at least a non-light sensitive layer, wherein the silver halide emulsion layer comprises a chalcogenic compound satisfying formula (1): ##STR1## wherein: X represents Se or Te, forming a double bond with its neighbouring C-atom,Nu represents a nucleophilic group which brings an electron pair in heterolytic bond formation; Nu has a pK.sub.a -value of at least 2.0 if Nu is an acidic group,L represents a divalent linking group representing each group which can position an electron donating atom in any of the 5th to the 8th position vis-a-vis the carbon atom of the carbon-chalcogen double bond,AQB represents the necessary atoms to form a heterocyclic 5- or 6-membered ring, provided that when A is a Nitrogen-atom, B is an atom selected from the group consisting of NR.sup.1, O, S, Se and Te,R.sup.

Abstract: A silver halide photographic light-sensitive material having at least one silver halide emulsion layer formed on a support, wherein silver halide grains in the emulsion layer are reduction-sensitized and contain at least one compound represented by formula (I) below. ##STR1## In formula (I), R is an alkyl group represented as follows. ##STR2## Each of R.sub.a, R.sub.b, R.sub.c, ad R.sub.d represents an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, or an amino group, each of Q.sub.a, Q.sub.b, Q.sub.c, and Q.sub.d represents a methylene group, and each of r, s, t, and u represents an integer from 1 to 10.Each of L.sub.1 and L.sub.2 represents a methine group. p1 represents 0 or 1. Z.sub.1 represents atom groups required to neutralize a 5- or 6-membered nitrogen-containing heterocyclic ring. M.sub.1 represents a charge-balancing counterion, and m.sub.1 represents a number from 0 to 10 required to form electric charge of a molecule.

Abstract: A method is disclosed of manufacturing radiation-sensitive emulsions by a pulsed flow double-jet process in which high chloride silver halide grains are grown in the presence of a thioether ripening agent in the dispersing medium in the reaction vessel the silver halide grains exhibiting an average grain roundness coefficient n in the range of from 2 to less than 15.

Abstract: Disclosed is a photographic element comprising a non-light sensitive layer containing elemental silver and a heterocyclic thiol compound having a Clog P of at least 2.0 but less than 12.0, provided that the ring system of the compound comprises a --N.dbd.C--S--H group or its tautomer and does not react with an oxidized developer. The invention provides improved minimum densities in imaging layers.

Abstract: A black-and-white silver halide photographic material is disclosed, said material comprising a support and on both sides thereof two light-sensitive emulsion layers and a protective antistress layer as an outermost layer, wherein per side of the support a total amount of silver, expressed as equivalent amount of silver nitrate of at least 5 g is coated, wherein the light-sensitive emulsion layer more close to the said outermost layer is provided with at least one spectrally sensitized silver halide emulsion having tabular emulsion crystals with {111} or {100} major faces, and wherein the emulsion layer more close to the said support is provided with at least one non-spectrally sensitized emulsion having essentially cubic silver halide emulsion crystals, characterized in that the said cubic emulsion crystals or the said tabular emulsion crystals or both have a halide composition including bromide.

Abstract: A recording material comprising a support, a thermosensitive element and a protective layer therefor, the thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the thermosensitive element further comprises in reactive association with the substantially light-insensitive organic silver salt and the organic reducing agent a substituted, exclusive of groups having an exclusively electron withdrawing character, or unsubstituted compound with an unsaturated 5-membered heterocyclic ring annulated with an aromatic ring system, the ring consisting of nitrogen and carbon atoms with at least one of the nitrogen atoms having a hydrogen atom and none of the carbon atoms being directly linked to a sulfur atom or being part of a carbonyl-group; a production process therefor and a thermal image recording process utilizing the recording material.

Abstract: A heat developable photographic material comprising a reducible silver salt, a reducing agent, a contrast enhancer, and a binder further contains a thiosulfonic acid ester compound and/or a thiosulfonic acid compound. The material exhibits ultrahigh contrast and low fog and is minimized in the variation of photographic characteristics with heat development conditions.

Abstract: A photographic element comprises at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of formulaZ-(L-XY).sub.kwherein:Z is a light absorbing group;L is a linking group containing a least one C, N, S, or O atom; andk is 1 or 2; andXY represents a fragmentable electron donor moiety wherein:1) XY has a an oxidation potential between 0 and about 1.4 V;2) X is an electron donor group;3) Y is a leaving group other than hydrogen; and4) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment the radical X.sup..cndot. has an oxidation potential of .ltoreq.-0.7 V.

Abstract: Disclosed is a novel silver halide color photographic light-sensitive material comprising a support and photographic constituent layers formed thereon, said photographic constituent layers including at least one photographic light-sensitive layer comprising light-sensitive silver halide, said silver halide color photographic light-sensitive material being capable of forming an image thereon after exposure and simple heat development thereof, wherein the light-sensitive material contains a specific compound acting as an anti-fogging agent and wherein at least one silver halide emulsion contained in the light-sensitive material is characterized in that silver halide grains of the emulsion have a silver chloride content of 50 mol % or more, the tabular grains whose principal faces are each made up of a (111) plane account for 50% or more of the total projected area of the silver halide grains of the emulsion, the tabular grains have an average thickness of 0.3 .mu.

Abstract: A method of making a thermally processable imaging element which comprises:i) forming a solution of poly(vinyl alcohol) in water;ii) adding matte particles to the resulting aqueous medium;iii) adding a compound of the formula I or formula II to the aqueous medium in an amount sufficient to inhibit agglomeration of the matte particles: ##STR1## wherein: the substituents are as described in the specification; iv) coating an image recording layer onto one side of a support;v) coating the aqueous medium containing the matte particles as an overcoat layer over the image recording layer or as backing layer on the side of the support opposite the image recording layer.

Abstract: A silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer, wherein silver halide grains of said emulsion layer are reduction sensitized and contain at least one compound represented by the following formula (I): ##STR1## wherein A represents a divalent linking group having at least one atom other than a carbon atom; Z.sub.1 represents an atomic group necessary for forming a 5- or 6-membered nitrogen-containing heterocyclic ring; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; M.sub.1 represents a counter ion for balancing a charge; m.sub.1 represents a number of from 0 to 10 necessary for neutralizing a charge in the molecule; and Q represents a group necessary to form a methine dye.

Abstract: A photothermographic material comprising a photosensitive silver halide, an organic silver salt, a reducing agent, and an ultrahigh contrast promoting agent, typically a hydrazine derivative. In one embodiment, a compound having a group for promoting adsorption to the silver halide is contained for suppressing occurrence of pepper fog. In another embodiment, a 5- or 6-membered heterocyclic mercapto compound having at least two nitrogen atoms or a tetraazaindene compound is contained for suppressing a change of photographic properties, typically image enlargement with a variation of developing conditions. In either case, the photothermographic material can form super-high contrast images of quality.

Abstract: A silver halide color photographic material comprises at least one silver halide emulsion layer on a reflex support silver halide grains containing at least 90 mol % silver chloride and having a silver bromide-rich region in the vicinity of at least one grain corner, but having an average silver bromide content of 15 mol % or less at the grain surface, (ii) at least one yellow coupler represented by the following general formula (I); and (iii) at least one compound represented by the following general formula (II): ##STR1## wherein R.sub.1 represents an aryl group or a tertiary alkyl group; R.sub.2 represents a fluorine atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkylthio group, or an arylthio group; R.sub.

Abstract: The invention relates to a photographic emulsion comprising silver iodochloride grains, said grains further comprising iridium, said grains chemically sensitized with gold in an amount of between 120 and 200 mg gold per silver mole and sulfur in an amount between 0.1 and 20 mg sulfur per silver mole, 1-(3-acetamidophenyl)-5-mercaptotetrazole, 1-phenyl-5-mercaptotetrazole, and a disulfide compound represented by the following formula: ##STR1## wherein X is independently --O--, --NH-- or --NR--, where R is a substituent;m and r are independently 0, 1 or 2;X is --H or a cationic species;Ar is an aromatic group; andL is a linking group, where p is 0 or 1.

Abstract: A recording medium comprising a support having thereon a recording layer comprising an organic silver salt, a developing agent for the organic silver salt, a water-soluble binder and an antifoggant in an amount of from 10 mol % to 40 mol % based on the organic silver salt. The recording material has a long shelf life and provides a high-density image.

Abstract: A radiographic element is disclosed containing in a high bromide tabular grain emulsion layer a 5-mercaptotetrazole to increase covering power. The 5-mercaptotetrazole is additionally capable of increasing imaging speed and producing colder image tones when provided with a phenyl substituent in the 1 ring position, which phenyl substituent is in turn substituted in its para position with a substituent satisfying the formula R(OCH.sub.2 CH.sub.2).sub.n O-- wherein n is an integer of from zero to 5; when n is 1 to 5, R is hydrogen, methyl or ethyl; and, when n is zero, R is methyl.

Abstract: There is disclosed a silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support, wherein the silver halide grains in at least one of the emulsion layers are subjected to reduction sensitization, and at least one of the emulsion layers contains at least one compound represented by general formula (I): ##STR1## wherein R represents a sulfonylalkenyl group; L.sub.1 and L.sub.2 each represent a methine group; p.sub.1 is 0 or 1; Z.sub.1 represents a group of atoms required to form a 5- or 6-membered nitrogen-containing heterocycle; M.sub.1 represents a counter ion for balance of a charge; m.sub.1 is a number of from 0 to 10 required to neutralize a charge of the molecule; and Q represents a methine or polymethine group substituted with a heterocyclic or aromatic group. The material has high sensitivity, low fog, and excellent storage stability.

Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains at least one red sensitizing dye.

Abstract: A color photographic recording material having at least one light-sensitive silver halide emulsion layer, the silver halide emulsion whereof is spectrally sensitized with a cyanine dye of the formula I, exhibits increased sensitivity, ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.6 to R.sup.9 are H, halogen, alkyl, methoxy, aryl, 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 2-furanyl, 3-furanyl, 2-thienyl, 3-thienyl, 1-indolyl, 2-isoindolyl or N-carbazolyl; or R.sup.7 together with R.sup.6 or R.sup.8 denote the group required to complete an optionally substituted fused benzene ring or napthylene ring system;R.sup.4 and R.sup.5 are alkyl, sulphoalkyl, carboxyalkyl, --(CH.sub.2).sub.n --SO.sub.2 --NH--SO.sub.2 -alkyl, --(CH.sub.2).sub.n --SO.sub.2 --NH--CO-alkyl, --(CH.sub.2).sub.n --CO--NH--SO.sub.2 -alkyl, or --(CH.sub.2).sub.n --CO--NH--CO-alkyl;X denotes --O--, --S--, --Se--, or --NR.sup.10 (R.sup.10 =optionally substituted alkyl);L.sup.1, L.sup.2, L.sup.

Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains a thiosulfonate and a sulfinate or seleninate and at least one red sensitizing dye.

Abstract: A black-and-white, negative-acting, silver halide emulsion is described which gives improved image tone when used in a photographic element. The toning agents are based on dithio-substituted compounds having the following general structures: ##STR1## where R.sub.1 and R.sub.2, independently, are selected from the group consisting of alkyl, aryl and heterocyclic groups, or R.sub.1 and R.sub.2 together complete a ring;n and m are integers from 1 to 5; Y is a hydrogen; R.sub.3 is a hydrogen or alkyl group;and X is selected from the group consisting of O, S, N--OH and N--N(R).sub.2, where R is a hydrogen or alkyl group.

Abstract: A photothermographic material has a photosensitive layer containing a binder, organic silver salt, reducing agent, and silver halide on one surface of a support. The photosensitive layer further contains a specific sulfur-containing compound and a merocyanine dye of specific structure and has an absorbance of 0.15-1.0 at an exposure wavelength. Sharpness, sensitivity, and aging stability are improved.

Abstract: A colour photographic silver halide material having a support and at least one silver halide emulsion layer, which contains a sensitiser of the formula (I), a stabiliser of the formula (II) and a stabiliser of the formula (III) ##STR1## in which R.sub.1 to R.sub.14, X.sub.1, X.sub.2, X.sup..crclbar., L.sub.1 to L.sub.5 and n have the meaning stated in the description, is distinguished by improved storage stability.

Abstract: A surface latent image type silver halide photographic material comprises a support and at least one surface latent image type silver halide emulsion layer provided thereon. Surface latent image type silver halide grains of the emulsion layer contain a cyano-chromium-complex ion represented by the formula (I):?Cr(CN).sub.6-n L.sub.n !.sup.m- (I)wherein L is H.sub.2 O or OH; n is 0 or 1; and m is 3 or 4.

Abstract: A silver halide photographic element comprising a silver halide emulsion which is greater than 50 mole % silver chloride, said emulsion being in reactive association with a dithiolone 1-oxide compound represented by the following formula: ##STR1## wherein b is C(O), C(S), C(Se), CH.sub.2 or (CH.sub.2).sub.2, and R.sup.1 and R.sup.2 are independently H, or aliphatic, aromatic or heterocyclic groups, alkoxy groups, hydroxy groups, halogen atoms, aryloxy groups, alkylthio groups, arylthio groups, acyl groups, sulfonyl groups, acyloxy groups, carboxyl groups, cyano groups, sulfo groups, or amino groups, or R.sup.1 and R.sup.2 together represent the atoms necessary to form a five or six-membered ring or a multiple ring system; and a sulfinate compound.

Abstract: A photosensitive element which comprises a support, at least one silver halide emulsion layer and at least a non-light sensitive hydrophilic colloidal layer, wherein the silver halide emulsion layer comprises a selenium compound represented by formula (1): ##STR1## wherein: Q represents R.sup.1 SO.sub.2 or R.sup.2 R.sup.3 P=X;each of R.sup.1, R.sup.2 and R.sup.3 the same or different represents OR.sup.4, NR.sup.5 R.sup.6, SR.sup.7, SeR.sup.8 an alkyl group, an aryl group or a heteroaryl group;X represents O, S or Se;each of R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 the same or different represents hydrogen, an alkyl group, an aryl group or a heteroaryl group, or R.sup.5 and R.sup.6 together represents the atoms necessary to form a N-containing ring.The invention also provides a method for the preparation of a photosensitive element as disclosed hereinbefore comprising the step of chemically sensitizing at least one of the silver halide emulsions by means of a selenium compound as defined.

Abstract: The present invention discloses a heat developable silver halide color photographic light-sensitive material comprising a support having thereon photographic constituent layers which comprise at least one photographic light-sensitive layer comprising a light-sensitive silver halide emulsion, a developing agent, a compound capable of forming a dye by a coupling reaction with the oxidation product of the developing agent, and a binder, wherein at least one photographic constituent layer contains at least one of the compounds expressed by the formula (I), (II), (III), or (IV) below, and wherein at least 50% of the total projected area of silver halide grains contained in the light-sensitive silver halide emulsion is taken up by tabular silver halide grains at least 50% of which are composed of silver chloride.

Abstract: Chemical sensitization of silver halide photothermographic emulsions used in photothermographic elements, can be effected by the decomposition of sulfur containing compounds on or around the surface of the silver halide grains, usually under oxidizing conditions at elevated temperatures. Alignment of the sulfur containing compounds on the surface of the grains, can be accomplished with spectral sensitizing dyes and appears to be particularly effective in providing strong chemical sensitization effects.

Abstract: This invention relates to a silver halide photographic element comprising a silver halide emulsion precipitated and/or chemically sensitized in the presence of an sulfenimide compound represented by the formula: ##STR1## wherein M represents the atoms necessary to form, with R.sup.1 and R.sup.2, a five or six-membered ring or a multiple ring system; w is 1 or 0, wherein when w is 0, R.sup.1 and R.sup.2 are independently substituted or unsubstituted aliphatic, aromatic or heterocyclic groups, and when w is 1, R.sup.1 and R.sup.2 are independently carbonyl or sulfonyl groups; R.sup.3 is independently a substituted or unsubstituted aliphatic, aromatic or heterocyclic group and x is 0 or 1.

Abstract: A photothermographic material contains a compound of formula (I): ##STR1## wherein X represents --N.dbd., --N(R)--, --O--or --S--wherein R represents hydrogen, hydroxy, aliphatic hydrocarbon, aryl or heterocyclic group, Z represents a valence bond or a group of non-metallic atoms necessary to form a 5 to 7-membered ring with X, and each of Q.sub.1 and Q.sub.2 represents a group of non-metallic atoms necessary to form an aromatic hydrocarbon ring or aromatic heterocycle fused to the ring completed by Z. The material has high sensitivity in the infrared region and a minimal sensitivity change with varying storage conditions.

Abstract: A silver halide photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer, on a support, and comprising a reducing agent for color formation of carbamoyl-substituted hydrazine, a dye-forming coupler and at least one photographic stabilizer selected from five groups of compounds.

Abstract: A silver halide photographic light sensitive material is disclosed, comprising a support having thereon a silver halide emulsion layer comprising a silver halide emulsion, wherein the silver halide emulsion comprises silver halide grains having an average iodide content of 0 to 1 mol %, at least 50% of total grain projected area is accounted for by tabular grains having an aspect ratio of 2 to 20; and the silver halide grains being spectrally sensitized with a sensitizing dye represented by the following formula (1) or (2): ##STR1##

Abstract: This invention provides a thermally processable imaging element comprising a support and a thermographic or photothermographic imaging layer, said imaging layer comprising a sulfenimide compound represented by the formula: ##STR1## wherein M represents the atoms necessary to form, with R.sup.1 and R.sup.2, a five or six-membered ring or a multiple ring system; w is 1 or 0, wherein when w is 0, R.sup.1 and R.sup.2 are independently substituted or unsubstituted aliphatic, aromatic or heterocyclic groups, and when w is 1, R.sup.1 and R.sup.2 are independently carbonyl or sulfonyl groups; R.sup.3 is independently a substituted or unsubstituted aliphatic, aromatic or heterocyclic group and x is 0 or 1.In one embodiment the thermally processable imaging element comprises:(a) photographic silver halide, and(b) an image-forming combination comprising(i) an organic silver salt oxidizing agent, with(ii) a reducing agent for the organic silver salt oxidizing agent.

Abstract: A silver halide photographic laight-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer provided on the support, wherein at least one of the silver halide emulsion layer and the non-light-sensitive hydrophilic colloid layer contains a compound represented by the following Formula 1, and the silver halide emulsion layer contains tabular silver halide grains having an average aspect ratio of not less than 2.0 account for at least 50 % of total grain projected area of the emulsion, and the tabular grains have an average silver iodide content is not more than 1 mole-%;Formula 1R.sub.11 --(S).sub.n --R.sub.12wherein R.sub.11 and R.sub.12 are each independently represent an aliphatic group, an aromatic group or a heterocyclic group, the groups represented by R.sub.11 and R.sub.12 may be the same or different and they may be bonded with together to form a ring; and n is an integer of from 2 to 6.

Abstract: The invention relates to a photographic element comprising at least two photographic emulsions wherein the grains of said at least two emulsions are the same and wherein at least one of said at least two emulsions is treated with a speed decreasing compound.

Abstract: The invention relates to a photographic element comprising at least two photographic emulsions wherein the grains of said at least two emulsions are the same and wherein at least one of said at least two emulsions is treated with a speed decreasing compound of Formula I:Z.sup.1 --X.sup.1 O.sub.2 S--M.sup.1 (I)and a compound of Formula II:Z.sup.2 --X.sup.2 O.sub.x --M.sup.2 (II)wherein X.sup.1 is sulfur and X.sup.2 is selected from the group consisting of sulfur and selenium, M.sup.1 and M.sup.2 are independently selected from group consisting of a metal ion and ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of hydrogen and an alkyl of 1-3 carbon atoms, and Z.sup.1 and Z.sup.

Abstract: The invention relates to a photographic emulsion comprising silver iodochloride grains, said grains further comprising osmium and ruthenium, said grains chemically sensitized with gold in an amount of between 0.1 and 120 mg gold per silver mole and sulfur in an amount between 0.1 and 20 mg sulfur per silver mole and a disulfide compound represented by the following formula: ##STR1## wherein X is independently --O--, --NH-- or --NR--, where R is a substituent;m and r are independently 0, 1 or 2;M is --H or a cationic species;Ar is an aromatic group; andL is a linking group, where p is 0 or 1.

Abstract: In a silver halide color photographic photo-sensitive material comprising a reflective support having thereon photographic structural layers comprising one or more silver halide emulsion layers, pH of a coating of the silver halide color photographic photo-sensitive material ranges from 4.0 to 6.5 and at least one of the silver halide emulsion on layers contains at least one mercapto heterocyclic compound and tabular silver halide grains having {100} planes was main planes and having a silver chloride content of not less than 80 mol %, the silver halide grains containing at least one selected from the group consisting of metal complexes of Fe, Ru, Re, Os, Rh and Ir.

Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises comprising a support, having thereon, a silver halide emulsion layer and optionally a hydrophilic colloid layer, in which the silver halide emulsion layer comprises silver halide grains sensitized by a selenium compound or a tellurium compound, and a polysulfide compound, and at least one of the silver halide emulsion layer and the hydrophilic colloid layer contains a tabular particle of a silicate compound.

Abstract: The invention is generally accomplished by a method of sensitizing comprising providing tabular silver bromoiodide grains or bromoiodide grains doped with Se and Iridium bringing said grains into contact with a benzothiazolium salt or hydrolyzed benzothiazolium salt comprising ##STR1## wherein R.sub.1 is hydrogen, alkyl of from 1 to 8 carbon atoms, or aryl of from 6 to 10 carbon atoms,R.sub.4 and R.sub.5 are independently hydrogen or halogen atoms, aliphatic or aromatic hydrocarbon moieties optionally linked through a divalent oxygen or sulfur atom; or cyano, amino, amido, sulfonamido, sulfamoyl, ureido, thioureido, hydroxy, --C(O)M, or --S(0).sub.2 M groups, wherein M is chosen to complete an aldehyde, ketone, acid, ester, thioester, amide, or salt;Y.sub.1 is a charge balancing counter ion; andQ is a substituent of the formula:--LCONHS0.sub.2 R, --LCONHS0.sub.2 NHCOR alkyl, sulfoalkyl, phosphoalkyl, hydroxyalkyl, or L--CONH.sub.

Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one silver halide photographic emulsion layer of a silver halide emulsion, wherein the emulsion layer comprises monodisperse cubic silver halide grains which contain at least one metal atom of group VIII in the Periodic Table, and the silver halide emulsion is spectrally sensitized so as to have a sensitization maximum at a wavelength of 750 nm or more and further contains at least one of compounds represented by the following formulae (I-a), (I-b) and (I-c): ##STR1## wherein Z represents an alkyl group containing 1 to 18 carbon atoms, an aryl group containing 6 to 18 carbon atoms, or a heterocyclic group; Y represents atoms necessary to complete an aromatic ring containing 6 to 18 carbon atoms, or a hetero ring; M represents a metal atom or an organic cation; and n represents an integer of from 2 to 10.

Abstract: A radiation sensitive emulsion is disclosed containing iridium doped composite silver halide grains comprised of (a) host portions having an average aspect ratio of less than 1.3 and consisting essentially of monodisperse silver iodochloride grains containing from 0.05 to 3 mole percent iodide, based on total silver forming the host portions, with maximum iodide concentrations located nearer the surface of the host portions than their center and (b) epitaxially deposited portions containing the iridium dopant and silver bromide accounting for from 0.1 to 5 mole percent of total silver forming the composite grains.The emulsions are prepared by (a) first providing an emulsion containing grains which form the host portions of the grains and (b) modifying the performance properties of the host grains by a combination of silver bromide addition, iridium dopant incorporation and antifoggant addition, in which, prior to antifoggant addition, silver bromide in the amount of from 0.1 to 5.

Abstract: This invention relates to a silver halide color photographic element comprising a support, a silver halide emulsion and poly(thioether)s wherein greater than 50 percent of the poly(thioether)s have acidic functional end groups with an aqueous pKa.ltoreq.10, or end groups which will react to form acidic functional end groups with an aqueous pKa.ltoreq.10 during development, on both termini and wherein the poly(thioether)s have a molecular weight greater than 800.