Abstract: A silver halide photosensitive material containing a compound selected from Types 1-4 below which is capable of undergoing a one-electron oxidation to form a one-electron oxidation product (OEOP), and a reducing compound (Type 1) the OEOP is capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction, (Type 2) the OEOP is capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and the compound having, in its molecule, two or more groups adsorptive to silver halide, (Type 3) the OEOP is capable of releasing further one or more electrons after going through a subsequent bond forming process, and (Type 4) the OEOP is capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction.

Abstract: A silver halide emulsion is disclosed, comprising at least one monovalent Au(I) complex coordinated with a compound represented by the following formula (1): R1-Ch-2??(1) wherein R1 and R2 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, R1 and R2 may combine with each other to form a 3-, 4-, 5-, 6- or 7-membered ring, and Ch represents a sulfur atom, a selenium atom or a tellurium atom.

Abstract: A silver halide color photosensitive material has at least one blue-sensitive silver halide emulsion layer containing a yellow coupler, at least one green-sensitive silver halide emulsion layer containing a magenta coupler, at least one red-sensitive silver halide emulsion layer containing a cyan coupler, and at least one non-lightsensitive layer, on a support. The photosensitive material contains, in at least one of the layers, a compound having a reducing group and a compound having at least three hetero atoms capable of increasing a photographic speed of the photosensitive material in comparison with the case where the material does not contain the same.

Abstract: This invention relates to a silver halide photographic emulsion in which a silver emulsion high in silver iodide content of 80% by mol to 100% by mol based on the silver iodide content is chemically sensitized by at least one of methods of chalcogen sensitization and gold sensitization under the conditions that pAg is from 1.5 to 7.0, as well as a thermally developable photosensitive material having at least one image forming layer containing at least a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent and a binder on a support, and having at least one non-image recording protection layer to the image forming layer on the side remote from the support, and exposed by a laser beam in which the material contains the silver emulsion high in silver iodide content.

Abstract: Disclosed are a silver halide photographic light-sensitive material comprising silver halide containing a metal complex having a cyanide ligand in a silver halide emulsion layer and comprising a hydrazine compound having an onium group in the molecule, and a method of developing the silver halide photographic light-sensitive material with a developer having a pH of 9.0-11.0. The silver halide photographic light-sensitive material of the present invention can provide high sensitivity, high processing stability and high contrast images.

Abstract: This invention relates to a silver halide photographic element comprising a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of the dye image forming units contains layers of differing sensitivities, and the layer of highest sensitivity contains a development promoting agent or a specific coupler as described herein, or a combination thereof, and a silver halide emulsion comprising tabular silver halide grains having associated therewith at least two dye layers comprising (a) an inner dye layer adjacent to the silver ha

Abstract: A silver salt photothermographic material exhibiting enhanced image quality and superior uniformity without causing uneven density is disclosed, comprising on a support a light-sensitive layer comprising a light-sensitive emulsion containing organic silver salt grains and light-sensitive silver halide grains, a reducing agent and a binder and a conductive layer, wherein the conductive layer contains at least one of compounds represented by the following general formulas: (Rf2)—(A2)s LiO3S—(CF2)m—SO3Li MO3S—(CF2)t—SO3M L[O3S—(CF2)u—SO3]

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains, wherein at least 50% of total grain projected area is accounted for by tabular grains having an aspect ratio of 10 to 100 and at least 50% by number of total grains is accounted for by tabular grains having at least 30 dislocation lines per grain in the fringe portion of the grain, and the emulsion contains a compound having a function of permitting injection of at least two electrons into silver halide via photoexcitation by a single photon.

Abstract: A silver halide photographic lightsensitive material comprising a support having thereon at least one lightsensitive silver halide emulsion layer, wherein the lightsensitive material contains at least one compound represented by general formula (I) and at least one photographically useful group-releasing compound represented by general formula (II) or (III) that is capable of forming a compound having substantially no contribution to a dye after its coupling with an oxidized form of a developing agent:

Abstract: Disclosed is a highly sensitive photothermographic material containing on a support a silver salt of an organic acid, a photosensitive silver halide, a reducing agent, a binder and, for example, a compound of which one-electron oxidized derivative produced by one electron oxidation of the compound is capable of releasing two or more electrons with a bond cleavage.

Abstract: An object of the present invention is to provide a silver halide photographic light-sensitive material which is reduced in the various problems ascribable to the multilayer adsorption of the sensitizing dye. A silver halide photographic emulsion comprising a silver halide grain having adsorbed on the surface thereof a sensitizing dye in multiple layers is described, wherein the variation coefficient of the light absorption strength distribution among the grains is 100% or less.

Abstract: A silver halide photographic material containing silver halide grains onto which a sensitizing dye in the first layer and a sensitizing dye or dyes in the second or after layers are multilayer-adsorbed, wherein the fluorescence life time of the dye or dyes in the second or after layers on the silver halide grain surface measured at a maximum wavelength of fluorescence spectrum is shorter than the fluorescence life time of the dye or dyes in a gelatin dry film measured at a maximum wavelength of fluorescence spectrum when the sensitizing dyes are multilayer-adsorbed onto the silver halide grain surface.

Abstract: The thermally developable photosensitive material of the present invention has a support and including on at least one surface of the support a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for thermal development, a binder and a compound represented by the following general formula (1): wherein R1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; X represents a chalcogen atom; and Y represents an amino group, an N-alkylamino group, an N,N-dialkylamino group, an anilino group, a hydroxyl group, an alkoxy group, an aryloxy group, an acylamino group or a sulfonamide group, and wherein when Y represents an alkoxy group, an alkylamino group, a dialkylamino group, an acylamino group or a sulfonamide group, Y and R1 may be bonded to each other to form a 5- to 7-membered ring.

Abstract: A silver halide emulsion which exhibits superior latent image stability when subjected to subjected to digital exposure at a high intensity for a short time is disclosed, comprising silver halide gains containing at least 90 mol % chloride, 0.02 to 5.0 mol % bromide and 0 to 2.0 mol % iodide, based on silver and occluding at least one Group 8 metal compounds and at least one iridium compound, and the silver halide grains are subjected to selenium sensitization which is undergone in the presence of at least one of compounds represented by the following formulas and silver or gold sulfide grains. A preparation method of the emulsion is also disclosed.

Abstract: A silver halide emulsion comprising tabular grains having a very small thickness with the main surfaces thereof having a very large surface area and being (111) face, is disclosed. More specifically, a silver halide emulsion is disclosed, comprising light-sensitive silver halide grains having a silver bromide content of 70 mol % or more, with 60 % or more of the entire projected area of said silver halide grains being occupied by tabular grains having an average grain thickness of less than 0.04 &mgr;m, an average equivalent-circle diameter of 4 &mgr;m or more, and (111) face as main surfaces.

Abstract: A black and white monosheet thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is represented by formula (I): 1

Abstract: A photothermographic material that comprises a support having thereon one or more thermally-developable imaging layers comprising a binder and in reactive association, a photosensitive silver halide, a non-photosensitive source of reducible silver ions, and a reducing composition for the non-photosensitive source reducible silver ions. The thermally-developable layers further comprises one or more radiation absorbing compounds that provide a total absorbance of greater than 0.6 and up to and including 3 in the thermally-developable imaging layer(s). These photothermographic materials are independently coated and dried while the material is conveyed at a rate of at least 5 meters per minute.

Abstract: A silver halide emulsion comprising silver halide grains containing at least 90 mol % chloride, 0.02 to 5.0 mol % bromide and 0 to 2.0 mol % iodide, which is prepared by a process comprising (i) forming a silver halide grain emulsion, (ii) subjecting the silver halide emulsion to desalting and (iii) subjecting the desalted silver halide emulsion to chemical sensitization by adding a chemical sensitizer, wherein in the step (iii), at least one compound represented by the following formula (1) to (4) is added before adding a chemical sensitizer and at least one compound represented by the following formula (1) to (4) is further added after adding a chemical sensitizer.

Abstract: Disclosed is a color photographic element comprising at least one light sensitive silver halide emulsion layer containing a compound that does not react with oxidized developer, has a Log Kow high enough to improve speed, compared to the same layer without the compound, and comprises

Abstract: Thermally developable compositions such thermographic and photothermographic emulsions include certain triazine-thione compounds. These emulsions can be used in thermally developable materials such as thermographic and photothermographic materials to provide increased image density and shortened development time, and to allow development at lower temperatures. Such materials can have imaging layers on one or both sides of the support.

Abstract: The invention is a heat-developable light-sensitive material having, on a face of a support thereof, a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder. In first and second aspects, the silver iodide content of the silver halide is from 5 mol % to 100 mol %, and the material contains a compound (eg. silver iodide complex-forming agent) capable of substantially lowering through heat development a spectral absorption intensity derived from the silver halide in visible and ultraviolet regions. In the first aspect, the silver halide is photosensitive silver halide grains having a mean diameter of 0.001 to 0.08 &mgr;m. In its second aspect, the material is exposed to light shorter than 700 nm.

Abstract: A silver halide photographic emulsion which contains at least two sensitizing dyes represented by the following formula (I): Dye-((A)rQ)q(M)m  (I) wherein Dye represents a dye moiety; A represents a linking group; Q represents a dissociable group; r represents 0 or 1; q represents an integer of 2 or more; provided that at least one Q represents —SO3H and at least one Q represents a dissociable group other than —SO3H; M represents a counter ion; and m represents a number of 0 or more necessary to neutralize the electric charge in the molecule, and when 2 represents 2 or more, M's need not be the same.

Abstract: A photothermographic material is described, which comprises a support having provided on at least one side thereof a photosensitive silver halide, a photo-insensitive organic silver salt, a reducing agent for silver ion and a binder, wherein at least one layer constituting the photothermographic material comprises an oxazoline compound, by which sufficiently high image density is developed within practically feasible reaction time and temperature, and sufficiently suppressed background coloration is exhibited when stored for a prolonged period after development processing.

Abstract: A black and white monosheet substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is selected from compounds represented by formula (I): 1

Abstract: A silver halide photographic material is disclosed, comprising at least one silver halide emulsion layer provided on a support, the emulsion layer comprising a silver halide emulsion containing at least two sensitizing dyes represented by the following general formula (I): wherein X represents an oxygen atom, sulfur atom, selenium atom or NR′; R and R′ each represent a substituted or unsubstituted alkyl, aryl or heterocyclic group; D represents a group required to form a methine dye; M represents a counter ion; and m represents a number of not smaller than 0 required to neutralize the electric charge in the molecule.

Abstract: The present invention relates to a silver halide color photographic light-sensitive material wherein at least one of light-sensitive silver halide emulsion layers includes a silver halide emulsion having a silver chloride content of at least 95 mol % and a silver iodide content of 0.05 mol % to 0.75 mol % and/or a silver bromide content of 0.05 mol % to 4.

Abstract: A silver halide photographic light-sensitive emulsion comprising a silver halide and a compound represented by the following Formula (I): wherein each X3 and X4 represents independently N, P, S, Se or Te; each Y1 and Y2 represents independently a group of carbon atoms necessary to complete a 6 to 12 membered heterocyclic ring with X3 and X4.

Abstract: A silver salt photothermographic dry imaging material including non-photosensitive aliphatic carboxylic acid silver salts; a photosensitive emulsion containing photosensitive silver halide grains; a silver ion reducing agent; a binder; and a cyan coloring leuco dye. A percentage of the photosensitive silver halide grains having a mean particle size of 0.01 or more &mgr;m and 0.04 &mgr;m or less is 5% or more by mass and 50% or less by mass of total photosensitive silver halide grains by conversion into a silver amount.

Abstract: A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one stabilizer selected from the group consisting of 1-phenyl-5-mercaptotetrazole compounds in which the phenyl group is substituted with a substituent containing an optionally substituted aryl group; and 1

Abstract: Photothermographic materials prepared using aqueous formulations include silver halides that are chemically sensitized using certain tellurium-containing compounds. Such tellurium-containing chemical sensitizing compounds are generally provided in aqueous solution or in an aqueous solid particulate dispersion and can be represented by the following Structure I, II, or III: Te(L)m(X1)n  (II) Pd(X2)2[Te(R′)2]2  (III) wherein X represents the same or different COR, CSR, CNRRa, CR, PRRa, or P(OR)2 groups, R and Ra are independently alkyl, alkenyl, or aryl groups, L is a ligand derived from a neutral Lewis base, X1 and X2 independently represent a halo, OCN, SCN, S2CNRRa, S2COR, S2CSR S2P(OR)2, S2PRRa, SeCN, TeCN, CN, SR, OR, alkyl, aryl, N3, or O2CR group, R′ is an alkyl or aryl group, p is 2 or 4, m is 0, 1, 2, or 4, and n is 2 or 4 provided that when m is 0 or 2, n is 2 or 4, and when m is 1 or 4, n is 2.

Abstract: The present invention provides a photothermographic material comprising a substrate and a composition provided thereon. The composition includes a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for thermal development and a binder. Each of organic compounds comprised in an amount of approximately 0.05 g/m2 or more in the composition has a volatilization remaining ratio of 50% or more at 160° C. The photothermographic material preferably comprises, as a color tone adjuster, a combination of a phthalazine acid and a phthalic acid compound each having a specific structure. The invention further provides a method for producing the imaged photothermographic material. In the production of this material, a thermal developing device having a filter for collecting volatilized material is used.

Abstract: A silver halide emulsion is disclosed, comprising at least one monovalent Au(I) complex coordinated with a compound represented by the following formula (1):

Abstract: Thermally developable compositions such thermographic and photothermographic emulsions include certain triazine-thione compounds. These emulsions can be used in thermally developable materials such as thermographic and photothermographic materials to provide increased image density and shortened development time, and to allow development at lower temperatures. Such materials can have imaging layers on one or both sides of the support.

Abstract: A photothermographic imaging material comprising a support having thereon a photosensitive layer comprising a photosensitive silver halide, a light-insensitive organic silver salt, a binder, and a reducing agent for silver ions, wherein the reducing agent is represented by the following Formula (S):  wherein Z is a group of atoms necessary to form a non aromatic ring of 3 to 10 members; Rx is a hydrogen or an alkyl group; each Ro′ and Ro″ is independently a hydrogen, an alkyl group, an aryl group, or a heterocyclic group; Qo is a substituent; and each n and m is independently an integer of 0 to 2; and plural Qos may be the same or different.

Abstract: This invention relates to a silver halide photographic element comprising a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of the dye image forming units contains layers of differing sensitivities, and the layer of highest sensitivity contains a development promoting agent or a specific coupler as described herein, or a combination thereof, and a silver halide emulsion comprising tabular silver halide grains having associated therewith at least two dye layers comprising (a) an inner dye layer adjacent to the silver ha

Abstract: Photothermographic imaging materials having increased photospeed are provided by certain tellurium chemical sensitizers that are added during the formulation of a photothermographic emulsion.

Abstract: Disclosed is a photothermographic material comprising, on one side of a support, a photosensitive silver halide, a non-photosensitive silver salt of an organic acid, a reducing agent for silver ions and a binder, which is characterized by containing one or more phenol compounds as the reducing agent and one or more compounds satisfying at least one of the following requirements A and B in combination:

Abstract: The present invention provides the photothermographic material including a photosensitive silver halide, a reducing agent for reducing silver ions, a binder and a non-photosensitive organic silver salt, wherein the photosensitive silver halide has a silver iodide content ranging from 40 mol % to 100 mol %, and has a particle size ranging from 5 nm to 80 nm, and wherein the non-photosensitive organic silver salt is prepared in the presence of the photosensitive silver halide which has been preformed, such that the non-photosensitive organic silver salt includes the photosensitive silver halide.

Abstract: Disclosed is a silver halide photographic light-sensitive material comprising at least one silver halide emulsion layer on a support, which contains a compound of which one-electron oxidized derivative produced by one electron oxidation of the compound is capable of releasing two or more electrons with a bond cleavage and has a characteristic curve drawn in orthogonal coordinates of logarithm of light exposure (x-axis) and optical density (y-axis) using equal unit lengths for the both axes, on which gamma is 5.0 or more for the optical density range of 0.3-3.0. This silver halide photographic light-sensitive material shows high contrast and high sensitivity.

Abstract: A silver halide photosensitive material contains a compound of the following general formula (I): wherein A1a represents a group selected from among CR1aR2a, NR1a, an oxygen atom and sulfur atom, A1b represents a group selected from among CR1bR2b, NR1b, an oxygen atom and sulfur atom, and each of R1a, R2a, R1b, R2b and R3 represents a hydrogen atom or a substituent, provided that, in the groups of CR1aR2a and CR1bR2b, R1aR2a and R1bR2b may represent a single divalent substituent, n represents an integer of 1 to 4, provided that, when n is 2 or more, a plurality of A1bs may be the same or different.

Abstract: Aqueous-based photothermographic materials comprise a hydrophilic binder, preformed silver halides, an organic silver salt, a reducing agent composition, and one or more benzothiazolium, benzoselenazolium, or benzotellurazolium salts as antifoggants. These photothermographic materials can be used in combination with phosphor intensifying screens for radiographic imaging.

Abstract: The present invention provides a photothermographic material, comprising a photosensitive silver halide, a non-photosensitive organic solvent salt, a reducing agent for a silver ion, and a binder on one face of a support, for being applied by using an organic solvent, the photothermographic material further comprising at least one compound selected from the group of compounds consisting of: a compound represented by the following general formula (1), a compound having a &bgr;-lactam ring, a compound having a group that is adsorptive to a silver halide and a group that reduces a silver halide and a precursor thereof: 1

Abstract: A color photographic silver halide material which can be developed to form a negative, at least 95 mol % of the silver halides of which consist of AgCl, and which contains at least one light-sensitive silver halide emulsion layer, the silver halide of which contains at least one compound of formulae (I), (II) and (III): [IrClnF6-n]2−M2+  (I) wherein n denotes 0 or an integer from 1 to 6 and M2+ denotes 1 or 2 cations with a total number of 2 positive charges, [Fe(CN)6]m−Mm+  (II) wherein m denotes 2 or 3 and Mm+ denotes 1 to 3 cations with a total number of m positive charges, wherein o denotes 0, 1 or 2 and R denotes an alkyl, aryl or aralkyl, is distinguished under scanning exposure and on analogue exposure by sharp contrast which is independent of exposure time and by a stable latent image.

Abstract: A photothermographic imaging material comprising a support having thereon a photosensitive layer, wherein the photosensitive layer has a silver coverage of 0.8 to 2.5 g/m2 and comprises a compound represented by Formula (A) or Formula (B): wherein each R3, R4 and R5 is independently an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, provided that R5 includes a silyl containing group, wherein Z2 represents OR22, X2, or OH; n2 is an integer of 1 to 3; each R21 and R22 is independently an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, provided that R21 contains at least one primary amino group or at least two selected from the group consisting of primary and secondary amino groups; and X is a chlorine atom or a bromine atom.

Abstract: A silver halide emulsion comprises an electron-releasing compound of Types 1 to 4: (Type 1) a compound capable of undergoing a one-electron oxidation (1-EO) to form a one-electron oxidation product (1-EOP), the 1-EOP capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction, (Type 2) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and having, in its molecule, two or more adsorptive groups acting on silver halides, (Type 3) a compound capable of undergoing 1-EO to thereby form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent bond forming process, and (Type 4) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction.

Abstract: The invention provides a photothermographic material including, on a same surface of a substrate, photosensitive silver halide grains, a non-photosensitive organic silver salt, a reducing agent and a binder, in which the photosensitive silver halide grains include iridium and a metal of groups 3 to 10 of the periodic table other than iridium, and 90% or more of the total iridium amount within the grain are contained in a core of 50% or less of the grain.

Abstract: A silver halide photosensitive material comprises at least one light sensitive silver halide emulsion layer on a support. The silver halide photosensitive material contains at least one compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, the one-electron oxidation product being capable of releasing further one or more electrons, and at least one reducing compound having a C/H value of 3 or less; and another reducing compound having a C/H value of more than 3, the C/H value representing a ratio of (the number of Group IV elements)/(the sum of Groups III, V, VI and VII elements).

Abstract: This invention relates to a photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a water soluble Au(I) complex having the formula [L—Au—L]n−M+n wherein the complex is symmetrical; L is an organothiosulfonato ligand which is an antifogging, stabilizing, or sensitizing compound, n is 1 to 4, and M is a cationic counterion. This invention further relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organothiosulfonato Au(I) complex having the formula [A—SO2S—Au—SSO2—A]n−M+n wherein M is a cationic counterion; A is a substituted or unsubstituted organic group; and n is 1 to 4; and wherein the compound is symmetrical. It further relates to a method of preparing a silver halide emulsion utilizing said organothiosulfonato Au(I) complexes.

Abstract: A thermal development photosensitive material suitable for medical diagnoses, industrial photography, printing and COM. The material contains at least one photosensitive silver halide, a non-photosensitive organic silver salt, a binder, at least one of compounds represented by the following formula (I) and at least one of compounds represented by the following formula (II) on one surface of a substrate. The material has high sensitivity and provides an image with a tone close to a pure black tone.

Abstract: Provided are a silver halide photographic emulsion containing a metal complex represented by the following formula (I):