Abstract: Photothermographic imaging materials having increased photospeed are provided by certain selenium chemical sensitizers that are added during the formulation of a photothermographic emulsion. These selenium chemical sensitizers can be used alone or in combination with other sulfur, tellurium, or gold chemical sensitizers as well as with oxidatively decomposed sulfur-containing compounds.

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: 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: The present invention provides a photothermographic material having an image-forming layer that contains a non-photosensitive silver salt of an organic acid, a photosensitive silver halide, a specific nucleating agent, a compound represented by the formula (1) and a binder on at least one side of a support: wherein P represents an oxygen atom, a sulfur atom or NH, Q represents an oxygen atom or a sulfur atom, Y represents OH, OM (M represents a counter ion) or NH2, L represents a divalent bridging group, and Z represents an alkyl group, an aryl group or a heterocyclic group.

Abstract: A silver halide photographic light-sensitive emulsion comprising a silver halide and a compound represented by the following Formula (I): 1

Abstract: A radiographic silver halide film material and a radiographic screen/film combination has been disclosed, said material having in at least one light-sensitive layer thereof an emulsion comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range between 540 and 555 nm by the presence of a combination of at least one J-aggregating spectrally sensitizing cyanine dye according to the formula (I) and of at least one additional cyanine dye providing a shift of maximum absorption wavelength of said combination of less than 10 nm versus in the absence thereof, wherein said additional cyanine dye is at least one monomethine cyanine dye according to the formula (II), essentially having a solubilizing group or a latent solubilizing group, said dyes having been given in the description and in the claims of the present invention.

Abstract: A silver halide photographic light-sensitive material is disclosed, comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein said emulsion layer contains a compound represented by the following formula (1):

Abstract: A silver halide photographic light-sensitive material having at least one emulsion layer comprising silver halide grains, with the emulsion layer further comprising at least one compound represented by the following formula (I) and at least one compound represented by the following formula (II), (III), (IV-1), (IV-2), (V-1), (V-2), (V-3) or (VI): (X&Parenclosest;1&Parenopenst;L&Parenclosest;m&Parenopenst;A—B)n  (I)  (Het&Parenclosest;k1&Brketopenst;&Parenopenst;Q1&Parenclosest;k2&Parenopenst;Hy)]k3  (III) wherein the substituents as defined herein the specification.

Abstract: A process of sensitizing a tabular grain emulsion containing the steps of (i) providing a tabular grain host emulsion comprised of a dispersing medium and silver halide grains including tabular grains having {111} major faces and an aspect ratio of at least 2, which contain greater than 50 mole percent bromide, based on silver, and which account for greater than 50 percent of total grain projected area; (ii) adding a thiosulfonate compound of the following Formula I at the surface of the tabular grains of the host emulsion: Z1SO2SZ2  (I) where Z1 represents is a substituted or unsubsituted aliphatic, aromatic, or heterocyclic group, and Z2 represents a substituted or unsubsituted aliphatic, aromatic, or heterocyclic group, or a monovalent metal or organic cation, where Z1 and Z2 may combine together to form a ring structure or either of Z1 or Z2 may comprise a polymeric backbone wherein the thiosulfonate group may be repeated; and (iii) adding silver and halide ions, where the halide

Abstract: A silver halide photographic element comprises at least one silver halide emulsion layer comprising a silver halide emulsion comprising core/shell silver halide grains wherein the core region comprises silver bromide with from about 5 to about 20% silver iodide and the shell region comprises silver bromide with about 0.1 to about 10% silver iodide and said layer contains a fragmentable electron donor compound of the formula X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein X is an electron donor moiety, Y′ is a leaving proton H or a leaving group Y, with the proviso that if Y′ is a proton, a base, &bgr;−, is covalently linked directly or indirectly to X, and wherein: 1) X—Y′ has an oxidation potential between 0 and about 1.

Abstract: A fluorocompound denoted by general formula (1) below (wherein R1 denotes a substituted or unsubstituted alkyl group having a total of at least six carbon atoms, with R1 not being an alkyl group substituted with a fluorine atom; Rf denotes a perfluoroalkyl group having not more than six carbon atoms; either X1 or X2 denotes a hydrogen atom and the other denotes SO3M; M denotes a cation; and n denotes an integer of not less than 1) was disclosed. A silver halide photographic light-sensitive material having at least one layer comprising a light-sensitive silver halide emulsion layer on a support and comprising a compound denoted by general formula (1) above was also disclosed.

Abstract: A silver salt photothermographic material is disclosed, comprising a support having provided thereon a light-sensitive layer containing light-sensitive silver halide, a light-insensitive organic silver salt and a binder, wherein the photothermographic material exhibits a gradation of 2.0 to 5.0 within the density region of 0.5 and 2.0 on a photographic characteristic curve obtained when the photothermographic material is subjected to exposure of 50 &mgr;J/cm2 and thermal development at 124° C. for 16 sec.; the light-sensitive layer comprises lower and upper layers and a glass transition temperature of a binder contained in the lower layer being higher than that of a binder contained in the upper layer.

Abstract: The second silver halide photosensitive material comprises a substrate and at least one photosensitive silver halide emulsion layer formed thereon, the silver halide photosensitive material comprising at least two types of silver halide grains with different projected areas having photosensitivity in the same photosensitivity range; silver halide grains having a larger projected area having a refractive index n1 and an average thickness a, and silver halide grains having a smaller projected area having a refractive index n2 and an average thickness b; and the silver halide grains satisfying the conditions defined by the following equation (1):

Abstract: A silver halide photographic emulsion is disclosed, comprising a silver halide grain having a spectral absorption maximum wavelength of less than 500 nm and a light absorption intensity of 60 or more or having a spectral absorption maximum wavelength of 500 nm or more and a light absorption intensity of 100 or more, wherein assuming that a maximum value of the spectral absorption factor of said emulsion by a sensitizing dye is Amax, the distance between the shortest wavelength showing 80% of Amax and the longest wavelength showing 80% of Amax is 20 nm or more and the distance between the shortest wavelength showing 50% of Amax and the longest wavelength showing 50% of Amax is 120 nm or less.

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: High-speed black-and-white photothermographic emulsions and materials comprise chemically sensitized photosensitive silver halide grains, at least 70% of the total photosensitive silver halide projected area being provided by tabular silver halide grains comprising at least 70 mole % bromide (based on total silver halide). The tabular grains have an average thickness of at least 0.02 &mgr;m and up to and including 0.10 &mgr;m, an equivalent circular diameter of at least 0.5 &mgr;m and up to and including 8 &mgr;m, and an aspect ratio of at least 5:1. These high-speed materials can be imaged in any suitable fashion using ultraviolet, visible, infrared, or X-radiation. In one embodiment, they have one or more thermally developable layers on both sides of the support and can be imaged using X-radiation with or without a phosphor intensifying screen in an imaging assembly.

Abstract: Aqueous-based photothermographic materials that are sensitive to visible or X-radiation contain X-radiation sensitive phosphors in association with specific chemically sensitized tabular silver halide grains. The silver halide grains comprise at least 70 mol % bromide, based on total silver halide, have an average thickness of at least 0.02 &mgr;m and up to and including 0.10 &mgr;m, an equivalent circular diameter (ECD) of at least 0.5 &mgr;m and up to and including 8 &mgr;m, and an aspect ratio of at least 5:1. These materials can be imaged in any suitable fashion but preferably they have one or more photothermographic layers on both sides of the support and can be imaged using X-radiation with or without an associated phosphor intensifying screen.

Abstract: A silver halide emulsion comprising at least one gold-containing compound represented by composition formula (1): [Au(0)Lm]Xn  (1) wherein Au(0) is an Au atom having a valence of zero, L is a compound having at least one group capable of being adsorbed to or coordinating with Au(0), m is a value of 0 or more including decimals, X is an ion required for neutralizing electric charge of the compound, and n is a value of 0 or more including decimals.

Abstract: A radiation-sensitive emulsion comprised of silver halide grains (a) containing greater than 50 mole percent chloride, based on silver, (b) having greater than 50 percent of their surface area provided by {100} crystal faces, and (c) having a central portion accounting for up to 99 percent of total silver and containing (i) a first dopant comprising an iridium coordination complex containing at least one thiazole ligand and (ii) a second dopant comprising an iridium coordination complex containing at least one substituted thiazole ligand. The combined use of first and second iridium dopants in accordance with the invention provides enhanced toe contrast softening, and can also result in improved latent image keeping stability relative to that expected from the individual effects of such dopants.

Abstract: Disclosed is a method for chemical sensitization of a silver halide emulsion comprising a sensitization step of subjecting the silver halide emulsion to chemical sensitization with a chalcogen compound or a chalcogen compound and a gold compound to produce silver chalcogenide or gold silver chalcogenide, wherein the chemical sensitization is performed under such conditions that at least a part of the silver chalcogenide or gold silver chalcogenide produced in the sensitization step can be amorphized. This method can provide a silver halide emulsion showing high sensitivity without increasing fog and degrading storability and such a silver halide emulsion.

Abstract: Photothermographic materials prepared using aqueous formulations include silver halides that are chemically sensitized using certain tellurium-containing compounds.

Abstract: Aqueous-based thermally sensitive emulsions and imaging materials include two or more hindered phenol silver ion reducing agents in a non-crystalline reducing agent composition. Such compositions can be provided as evaporated dispersions and can be formulated in aqueous coating compositions to provide thermally developable materials such as thermographic and photothermographic materials.

Abstract: Disclosed is a photothermographic material containing at least a photosensitive silver halide, a non-photosensitive silver salt of an organic acid, a reducing agent for silver ions and a binder on one surface of a support, wherein the material contains a compound producing imagewise a chemical species that can form development initiation points on and in the vicinity of the non-photosensitive silver salt of an organic acid or the like and an organic gold compound and the photosensitive silver halide has a mean grain size of 0.12 &mgr;m or less. This photothermographic material shows high sensitivity, low fog, high Dmax (maximum density), little increase of fog during storage and low temperature and humidity dependency during development.

Abstract: A high-sensitive silver halide photographic light-sensitive material is provided.

Abstract: A silver halide color negative photographic lightsentive material comprises at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive silver halide emulsion layer on a support. The lightsensitive material has an ISO speed of 640 or more, the total silver content of 3.0 to 9.0 g/m2. Each of the red-sensitive emulsion layer, green-sensitive emulsion layer and blue-sensitive emulsion layer comprises two or more silver halide emulsion sub-layers having the same color sensitivity but different in speed to each other, and each of the red-sensitive sub-layer having the highest speed, green-sensitive sub-layer having the highest speed and blue-sensitive emulsion sub-layer having the highest speed has a silver content of 0.3 to 1.3 g/m2.

Abstract: A light-sensitive silver halide photographic element comprising a support and at least one hydrophilic colloid layer comprising a binder and a vinylsulfonyl type hardener coated thereon, wherein at least one of said hydrophilic colloid layers is a silver halide emulsion layer containing tabular silver halide grains having an average diameter:thickness ratio of at least 3:1, characterized in that said tabular silver halide grains are chemically sensitized by at least one gold sensitizer and at least one thiosulfonate sensitizer in the presence of a palladium compound added during chemical sensitization. The silver halide photographic elements of the present invention can be advantageously developed in hardener free developer and used in high temperature rapid processing in automatic processors which include transporting rollers, have good photographic and physical characteristics and are free from surface defects.

Abstract: A silver halide color photographic light-sensitive material has a support provided thereon a photographic constitutional layer including at least one photographic light-sensitive layer that contains a light-sensitive silver halide, an organosilver salt having a nitrogen-containing heterocycle, a compound capable of forming a dye by coupling reaction with an oxidized developing agent, and a binder, wherein the light-sensitive layer contains: (A) as the silver halide, a silver halide emulsion composed of tabular silver halide grains having a main face made up of a (111) plane, an average diameter of an equivalent circle of at least 0.70 &mgr;m, and an average thickness of less than 0.20 &mgr;m; and (B) as the organosilver salt, a compound in which a hydrogen on a 5- or 6-membered nitrogen-containing heterocycle having at least one —NH— group is replaced with Ag.

Abstract: The invention relates to an emulsion comprising chemically and spectrally sensitized silver halide grains having formate on the surface of said grams.

Abstract: This invention comprises a photographic element comprising at least one light-sensitive silver halide emulsion layer containing a fragmentable electron donating compound of the formula: X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein X is an electron donor moiety, Y′ is a leaving proton H or a leaving group Y, with the proviso that if Y′ is a proton, a base, &bgr;−, is present in the emulsion layer, and wherein: 1) X—Y′ has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of X—Y′ undergoes a bond cleavage reaction to give the radical X• and the leaving fragment Y′; and 3) the radical X• has an oxidation potential ≦−0.

Abstract: A silver halide photographic emulsion wherein a variation coefficient of an equivalent-circle diameter of all the silver halide grains is 40% or less, and 50% or more of the total projected area is occupied by tabular grains satisfying requirements (i) to (v):

Abstract: This invention comprises a photographic element comprising at least one light-sensitive silver halide emulsion layer containing a fragmentable electron donating compound of the formula: X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein

Abstract: The present invention provides a thermally developable photosensitive material including a support, the image-forming layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent, a binder and a compound represented by the following formula (I), wherein after the material is exposed and thermally developed at 121° C.

Abstract: A fluorocompound denoted by general formula (1) below 1

Abstract: A red or infrared sensitive silver halide emulsion is disclosed, comprising at least a compound represented by the following formula. A photographic material containing the emulsion is also disclosed.

Abstract: A photothermographic material disclosed, comprising on a support a light sensitive layer containing an organic silver salt, light sensitive silver halide grains and a solvent, wherein the organic silver salt comprises tabular organic silver salt grains exhibiting an average needle ratio of not less than 1.1 and less than 10.0, the light sensitive silver halide grains having been subjected to chemical sensitization.

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): 1

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: A compound represented by the following formula (1) and a silver halide photographic material containing the compound: 1

Abstract: A silver halide color photographic lightsensitive material comprising at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive silver halide emulsion layer on a support, wherein the lightsensitive material has an ISO speed of 640 or more, and has a variation, in terms of a SNGR ratio, of magenta and cyan colors of 0 dB or more when the lightsensitive material is subjected to each of white light exposure, white fluorescent lamp exposure and three band fluorescent lamp exposure.

Abstract: A radiographic silver halide film material and a radiographic screen/film combination has been disclosed, said material having in at least one light-sensitive layer thereof an emulsion comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range between 540 and 555 nm by the presence of a combination of at least one J-aggregating spectrally sensitizing cyanine dye according to the formula (I) and of at least one additional cyanine dye providing a shift of maximum absorption wavelength of said combination of less than 10 nm versus in the absence thereof, wherein said additional cyanine dye is at least one monomethine cyanine dye according to the formula (II), essentially having a solubilizing group or a latent solubilizing group, said dyes having been given in the description and in the claims of the present invention.

Abstract: The present invention provides a silver halide photographic material that is excellent in photographic speed as well as image graininess and exhibits low residual color even after rapid processing. The silver halide photographic material contains a compound represented by formula (I) and a compound represented by formula (II), as defined.

Abstract: This invention comprises multicolor photographic element comprising a support bearing a cyan dye image-forming unit comprising 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, 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 said red-sensitive or green-sensitive layers comprises a fragmentable electron donating compound of the formula: X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein the speed gain deriving from addition of said compound to said layer is less than or equal to 0.

Abstract: A silver halide color photographic light-sensitive material has a support provided thereon a photographic constitutional layer including at least one photographic light-sensitive layer that contains a light-sensitive silver halide, an organosilver salt having a nitrogen-containing heterocycle, a compound capable of forming a dye by coupling reaction with an oxidized developing agent, and a binder,

Abstract: Photothermographic materials have increased photospeed provided by gold(III)-containing chemical sensitizers that are used combination with sulfur- and/or tellurium-containing chemical sensitizers. Increased photographic speed is achieved with minimal increase in Dmin. The gold(III)-containing chemical sensitizers are represented by the following Structure GOLD: Au(III)L′rYq GOLD wherein L′ represents the same or different ligands, each ligand comprising at least one heteroatom that is capable of forming a bond with gold, Y is an anion, r is an integer of from 1 to 8, and q is an integer of from 0 to 3.

Abstract: Photothermographic emulsions and materials that are highly sensitive to imaging radiation and that provide high contrast images are provided by making the emulsions with photosensitive silver halide grains that have been formed in the presence of a hydroxytetrazaindene or an N-heterocyclic compound comprising at least one mercapto group, such as a mercapto tetrazole. Such grains can then be chemically sensitized before or after mixing with an organic silver salt using a sulfur-, tellurium-containing, or gold-containing chemical sensitizing compound, or mixtures thereof.

Abstract: The present invention is to provide a silver halide photographic light-sensitive material comprising a support having thereon a light-sensitive silver halide emulsion layer comprising a compound represented by Formula,

Abstract: A silver halide color photographic light sensitive material is disclosed, comprising a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layers, wherein at least one of the silver halide emulsion layers contains a coupler represented by the following formula:

Abstract: A film material has been provided with emulsions comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range shorter than 420 nm by the presence of at least one blue spectral sensitizer and of at least one azacyanine dye, the formula of which has been given in the description and in the claims. A radiographic screen/film combination or system has also been provided comprising a duplitized film sandwiched between a pair of supporting or self-supporting X-ray intensifying screens, characterized in that i) said pair of supported or self-supporting X-ray intensifying screens essentially consists of luminescent phosphor particles emitting at least 50% and more preferably at least 80% of their emitted radiation in the wavelength range shorter than 420 nm, ii) said film corresponds with the film material disclosed hereinbefore.

Abstract: A system has been disclosed for use in radiographic industrial non-destructive testing materials and personal monitoring, making use therefor, of tabular silver brom(oiod)ide emulsion grains having {111} major faces, an average equivalent circular diameter of at least 0.5 &mgr;m and an average thickness of less than 0.30 &mgr;m, having been chemically sensitized by the steps of adding at least a gold salt in order to provide the surface of said tabular grains with at least 6000 atoms of gold per &mgr;m2 of its grain surface and per (0.1 &mgr;m of thickness)2; and at least a sulfite salt in such an amount that the ratio of the number of gold atoms per &mgr;m2 and (concentration of said sulfite salt, expressed in mmole per mole of silver)2 is at least 200000.

Abstract: A silver halide emulsion is disclosed, comprising tabular grains having dislocation lines in the fringe portion, the tabular grains comprising a silver halide phase (V3) having a maximum iodide content, a silver halide phase (V6), internal to V3, having an average iodide content of A6 mol %, and a silver halide phase (V7), external to V3, having an average iodide content of A7 mol %, and 0≦A6/A7≦1.0; and wherein the dislocation line forming region comprises a shell accounting for 10 to 50% by volume of the grain and having an average iodide content of 4 to 20 mol %; the shell comprising an outermost sub-shell accounting for to 15% by volume of the grain and having an average iodide content of 0 to 3 mol %.