Abstract: The present invention relates to polymethine spectral sensitising dyes comprising at least one intracyclic thioether function macrocycle.These special sensitising dyes may be used in silver halide photographic products.These spectral sensitising dyes improve the sensitivity of the photographic products whilst reducing the residual dye stain.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, where at least one silver halide emulsion layer contains a silver halide emulsion obtained by treating a silver halide emulsion containing a dye previously added thereto with a solid adsorbent which is a porous organic synthetic resin without any ion exchange group to thereby desorb the dye adsorbed.

Abstract: A photosensitive element having a photosensitive medium comprising silver halide in reactive association with an organoborate salt and wherein said medium is selected from:(a) silver halide photographic emulsions comprising a cationic dye, and(b) photothermographic media comprising in one or more layers a reducible silver source, a reducing agent for silver ion and an antifoggant.

Abstract: The invention relates to a method of sensitizing (111) high chloride tabular grains having {111} major faces comprising providing the high chloride tabular grains, and sensitizing using temperatures greater than 70.degree. C.

Abstract: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, (e) exhibiting an average thickness of less than 0.07 .mu.m, and (f) having latent image forming chemical sensitization sites on the surfaces of the tabular grains, are spectrally sensitized and improved by employing in forming the surface chemical sensitization sites at least one silver salt epitaxially located on the tabular grains.

Abstract: A silver halide emulsion having a high silver chloride content of about 95 mol % or more, wherein about 30% by number or by weight or more of the silver halide grains are those having one twin plane in the crystal such that the crystal planes constituting the surface of each grain consist essentially of (100) planes and having a silver bromide-localized phase having a relatively higher silver bromide content in the part of intersection of the twin plane and the surface of the grain and suitable for rapid processing with high sensitivity and excellent gradation characteristic and reciprocity law characteristic.

Abstract: Disclosed herein is a silver halide color photographic light-sensitive material which has a specific photographic sensitivity of 320 or more, and which comprises a support layer and silver halide emulsion layers formed thereon. The material has a film thickness of 22 .mu.m or less, measured from the light-sensitive layer closest to the support layer up to the surface of the material facing away from the support layer. At least one of the silver halide emulsion layers contains a spectral sensitizer represented by the following formula (I): ##STR1## In the formula, R.sup.1 and R.sup.2 are alkyl groups, at least one of which at least one carbon atom bonds together with at least three atoms other than hydrogen atoms, X is an anion, p is 0 or 1, k is 0, 1 or 2, L.sub.1 and L.sub.2 are a methyne group or a substituted methyne group, Z.sup.1 and Z.sup.2 are groups of atoms numerous enough to form a 5- or 6-membered nitrogen-containing heterocyclic ring.

Abstract: Disclosed is a silver halide photographic material containing a compound of formula (1) or (2): ##STR1## where DYE represents a methine dye residue; G and G.sup.- each represent a substituent for the methine dye residue, and are represented by formulae (3) and (4), respectively; and n represents an integer of from 1 to 6.--T.sup.1 --G.sup.1 NHG.sup.2 (3)--T.sup.1 --G.sup.1 N.sup.- G.sup.2 (4)where T.sup.1 represents a divalent linking group; G.sup.1 represents a carbonyl group, a sulfinyl group, or a sulfonyl group; G.sup.2 represents --CO--T.sup.2 --, --SO--T.sup.2, --SO.sub.2 --T.sup.2, or a cyano group; and T.sup.2 represents a monovalent group. The spectral sensitivity of the material is high, and the material has few residual color after processed.

Abstract: There is provided a silver halide photographic material which comprises silver chloride or silver chlorobromide substantially free from silver iodide. The silver halide photographic material is excellent in rapid processability, low in fogging, and high in sensitivity and contrast.

Abstract: A silver halide color photographic material is provided comprising at least one yellow-developable silver halide emulsion layer, at least one magenta-developable silver halide emulsion layer and at least one cyan-developable silver halide emulsion layer on a support, characterized in that said at least one cyan-developable silver halide emulsion layer comprises at least one cyan dye-forming coupler represented by the following general formula (Ia) and silver bromochloride or silver chloride emulsion grains substantially free of silver iodide having a silver chloride content of 95 mol % or more spectrally sensitized with at least one sensitizing dye having a reduction potential of -1.27 V (vs. SCE) or lower: ##STR1## wherein Za represents --NH-- or --CH(R.sub.3)--; Zb and Zc each represents --C(R.sub.4).dbd. or --N.dbd.; R.sub.1, R.sub.2 and R.sub.3 each represents an electron withdrawing group having a Hammett's substituent constant .sigma..sub.p value of 0.20 or more, with the proviso that the sum of .sigma.

Abstract: A color photographic element has a blue sensitive tabular grain silver halide emulsion layer the halide content of which is less than 80% chloride and which has a tabularity of at least 8. The foregoing emulsion is sensitized such that the wavelength of maximum sensitivity of the emulsion between 400-500 nm (".lambda..sub.Bmax "), the sensitivity at 485 nm ("S.sub.485 "), the sensitivity at 410 nm ("S.sub.410 "), and the sensitivity at .lambda..sub.Bmax (".lambda..sub.Bmax "), are defined by:430 nm.gtoreq..lambda..sub.Bmax .gtoreq.440 nm or 450 nm.gtoreq..lambda..sub.Bmax .gtoreq.480 nmandS.sub.485 .gtoreq.50% (S.sub.Bmax)S.sub.410 .gtoreq.60% (S.sub.Bmax)and the maximum sensitivity of the emulsion between 430-440 nm ("S.sub.(430-440)max "), and the maximum sensitivity between 450-480 nm ("S.sub.(450-480)max "), have the following relationship:90% (S.sub.(450-480)max).gtoreq.S.sub.(430-440)max .gtoreq.110%(S.sub.(450-480)max).

Abstract: Tabular grain emulsions are disclosed in which the tabular grains have average thicknesses of less than 0.07 .mu.m and average equivalent circular diameters of at least 0.7 .mu.m. These ultrathin tabular grain emulsions are improved by the incorporation of at least 0.4 mole percent chloride along with >50 mole percent bromide and, optionally, iodide. Greater than 97 percent of total grain projected area can be accounted for by the tabular grains. The emulsions exhibit reduced pressure sensitivity, exhibit increased developability and exhibit reduced native sensitivity to the blue region of the spectrum.

Abstract: There is disclosed a silver halide color photographic material having a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a blue-sensitive silver halide emulsion layer, which comprises a cyan dye-forming coupler represented by formula (Ia) and (a) a sensitizing dye containing a sulfonamide group, (b) negative-type internal latent image-type silver halide grains chemically sensitized to a defined depth from the surface, (c) grains each having a defined spectral sensitivity distribution and a DIR-hydroquinone, (d) a monodisperse silver halide emulsion, (e) non-photosensitive silver halide emulsion wherein the inside or the surface of grains is fogged, (f) a colloidal silver, or (g) a DIR-hydroquinone: ##STR1## wherein Za represents --NH-- or --CH(R.sub.3)--, Zb and Zc each represent --C(R.sub.4).dbd. or --N.dbd., R.sub.1, R.sub.2, and R.sub.3 each represent an electron-attracting group wherein the Hammett substituent constant .sigma..sub.p value is 0.

Abstract: There is disclosed a silver halide photographic light-sensitive material having a hydrophilic colloid layer containing a dye which is photochemically inactive and can readily be decolored and/or eluted in a photographic processing course. The silver halide photographic light-sensitive material comprises a hydrophilic colloid layer containing at least one dye dispersed in the form of a solid fine particle represented by Formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, X.sub.1, X.sub.2, L.sub.1, L.sub.2, L.sub.3 are defined in the disclosure.In a preferred embodiment, the maximum absorption wavelength .lambda.max of the dye in the hydrophilic colloid layer satisfies the following equation:.lambda.max>[.lambda.max(DMF)+20.times.(n+1)] nmwherein .lambda.max(DMF) and n are defined in the disclosure. There is also disclosed an oxonol compound which is useful as a dye.

Abstract: Heat-developable photographic recording materials comprising (a) at least one binder layer coated on a support, the binder layer containing at least one light-sensitive silver halide and a light-insensitive silver salt of a fatty acid; and in the binder layer or in another layer in reactive relationship to the binder layer (b) at least one reducing agent and (c) a stabilizer selected from the group of hexamethylene tetramine and salts thereof, triazaadamantane and salts thereof, and compounds that can be derived from hexamethylene tetramine by exchanging one or more --CH.sub.2 -- groups with --S--, --SO--, or --SO.sub.2 -- provide excellent stability during storage and can be manufactured easily and inexpensively and which presents minimal environmental or health risks.

Abstract: A novel silver halide photographic material is provided, comprising at least one methine compound having a methine dye and hydrazine covalently bonded to each other, two nitrogen atoms in said hydrazine being substituted by four substituents. In a preferred embodiment, the methine compound is represented by formula (I): ##STR1## wherein MET represents an atomic group; Q represents a divalent bonding group consisting of atoms or atomic group containing at least one of carbon atom, nitrogen atom, sulfur atom and oxygen atom; Hy represents an atomic group having a hydrazine structure represented by formula (II); k.sub.1 represents 0 or an integer 1 to 4; and k.sub.2 represents 0 or 1, and k.sub.3 represents an integer 1 to 4. ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an alkyl group, an aryl group or a heterocyclic group, with the proviso that Hy is substituted by at least one --(Q).sub.k2 -(MET).sub.k1. A novel methine compound is also provided represented by the general formula (I).

Abstract: A photographic element containing a dye of the structure (I) as a filter dye: ##STR1## wherein: G is oxygen, substituted nitrogen, or C(CN).sub.2 ;R.sup.1, R.sup.1 ', R.sup.2, R.sup.2 ' independently represent H or a substituent, or R.sup.1 and R.sup.2, R.sup.1 ' and R.sup.2 ' may form a ring;R.sup.3 is an alky, aryl, alkyloxy, aryloxy, amino, or heterocyclic, any of which may be substituted or unsubstituted;m is 0, 1, 2 or 3;all of the L together define a methine chain, each L representing a methine any of which may be substituted or unsubstituted; andM.sup.+ is a cation.

Abstract: There is disclosed a silver halide photographic material which is rapidly processable, high sensitive and small in variations in sensitivity between production lots of the photograhic material. The silver halide photographic material comprises a silver halide emulsion layer containing a cyan dye forming coupler, a silver halide emulsion layer containing a magenta dye forming coupler, and a silver halide emulsion layer containing a yellow dye forming coupler on a reflective support, wherein at least one layer of said silver halide emulsion layers comprises silver halide emulsion grains and compounds represented by the following general formulas (I) and (II), said emulsion grains being tabular silver halide emulsion grains having (100) planes as main planes and a silver chloride content of 90 mol % or more, and further the mean bromide ion content on surfaces of said emulsion grains is twice or more that of the whole emulsion grains: ##STR1## wherein the substituents are as defined herein the specification.

Abstract: A photographic light-sensitive silver halide material is disclosed comprising a support and one or more hydrophylic colloid layers including at least one light-sensitive silver halide emulsion layer characterized in that in said emulsion layer is a gold and sulphur sensitized silver bromide or silver bromoiodide emulsion having cubic crystal habit and in that said emulsion and/or a hydrophylic colloid layer in water-permeable relationship therewith comprises a 3-pyrazolidinone compound.

Abstract: The invention is directed to a process for forming a chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element comprising the steps of: providing, separately, a melt comprising a spectrally dye-sensitized silver halide emulsion and a dry diffusion transfer facilitating thermal solvent; mixing said spectrally dye sensitized silver halide emulsion melt and said dry diffusion transfer facilitating thermal solvent with a mixing means to create a mixed melt; providing a coating substrate; coating said mixed melt on said substrate to form a coated photographic element, wherein said coating takes place less than about 10 minutes after mixing.The heat-transferable photographic element thus formed has improved photographic sensitivity and increased sensitometric uniformity.

Abstract: A color photographic material comprising at least one cyan-coupling silver halide emulsion layer containing a red sensitizer, at least one magenta-coupling silver halide emulsion layer containing a green sensitizer and at least one yellow-coupling silver halide emulsion layer containing a blue sensitizer on a support, in which a silver halide emulsion is provided in a coupler-free layer sensitized with another spectral sensitizer (a gap sensitizer) of which the sensitization maximum lies between the sensitization maxima of the red- and green-sensitive layers or the green- and blue-sensitive layers, is distinguished by an extended gradation range towards the maximum densities and by distinctly improved detail reproduction in the region of high densities.

Abstract: A color photographic silver halide material having at least one silver halide emulsion layer which is cyan coupling and contains a red sensitizer, at least one magenta coupling silver halide emulsion layer containing a green sensitizer and at least one yellow coupling silver halide emulsion layer containing a blue sensitizer on a support, in which the at least one blue sensitive halide emulsion layer contains a further spectral sensitizer (gap sensitizer) whose sensitization maximum lies between the sensitization maxima of the red and green sensitive silver halide emulsion layer and/or the at least one red sensitive silver halide emulsion layer contains an additional spectral sensitizer (gap sensitizer) whose sensitization maximum lies between the sensitization maxima of the green sensitive and the blue sensitive silver halide emulsion layer is distinguished by an increased range of gradations in the region of the maximum densities and a markedly improved detail reproduction in the region of high densities.

Abstract: A color diffusion transfer light-sensitive material is described including a support having thereon at least one light-sensitive emulsion layer associated with a dye image-forming material and an electron donor, wherein the dye image-forming material comprises at least one reducible dye-providing compound represented by formula (I) which releases a diffusible dye upon being reduced and tabular silver halide grains having a mean grain diameter of at least about 0.3 .mu.m, a mean grain thickness of less than about 0.5 .mu.m, and a mean aspect ratio of at least about 2 account for at least about 50% of the total projected area of the silver halide grains contained in at least one light-sensitive emulsion layer;PWR - (Time).sub.t - Dye (I)wherein PWR represents a group capable of releasing -(Time).sub.t -Dye upon being reduced; Time represents a group capable of releasing Dye through a subsequent reaction after being released as -(Time).sub.

Abstract: A silver halide color photographic light sensitive material comprising a support having thereon light-sensitive silver halide emulsion layers, and a nonlight-sensitive hydrophilic colloidal layer, wherein the color photographic material has a coating weight of silver of not more than 4.0 g per m.sup.2 of a photographic material and an ISO speed of 25 or more, and wherein a silver halide emulsion contained in at least one of the light-sensitive emulsion layers is spectrally sensitized by a process comprising (i) forming a dispersion of a substantially water-insoluble spectral sensitizing dye in the form of solid particles dispersed in an aqueous medium which is free from an organic solvent or a surfactant and (ii) incorporating the dispersion in the silver halide emulsion.

Abstract: An improved image display material comprising a light sensitive tabular grain silver chloride emulsion spectrally sensitized to a peak wavelength of less than about 475 nm, and a method of use comprising the step of optically printing a color image onto the improved color photographic display material is provided. The material and method enable reduced printing times, improved color reproduction and lowered image granularity.

Abstract: A silver halide color photographic material is disclosed having on a support at least one light-sensitive silver halide emulsion layer comprising a chemically sensitized tabular silver halide emulsion containing tabular silver halide grains having an average diameter of 0.6 .mu.m or less and an average aspect ratio of from 2.0 to 5.0. The tabular silver halide emulsion is chemically sensitized in the presence of at least one spectral sensitizing dye, to provide a high sensitivity/granularity ratio, improved sharpness and stress resistance, and high production stability.

Abstract: A silver halide photographic light-sensitive material has at least one silver halide emulsion layer on a support. The silver halide emulsion layer contains a silver halide emulsion in which 50% or more of the projected area or the number of all silver halide grains are occupied by substantially perfect cubic silver halide grains, which are silver bromochloroiodide or silver bromoiodide grains having a silver iodide content of 0.5 mol % or more and a silver chloride content of 3 mol % or less and are spectrally sensitized with sensitizing dyes.

Abstract: A light-sensitive silver halide photographic material is disclosed. The light-sensitive material comprises a support having thereon a silver halide emulsion layer, and the silver halide emulsion layer comprises silver halide grains having a silver chloride content of not less than 95 mol %. The emulsion is optically sensitized by addition of a dispersion of an optical sensitizer comprising a medium and particles of the dye dispersed in the medium. The ratio of silver to gelatin (Ag/Gel) in the emulsion at the time of addition of the dispersion of the dye is 2 to 8.5.

Abstract: A silver halide photographic material having at least one light-sensitive silver halide emulsion layer coated on a support, wherein the silver halide emulsion layer contains silver chlorobromide grains comprising silver chlorobromide containing 90 mol % or more of silver chloride, having at least one region in which the silver bromide content is high at the vicinity of the corner of the grains, and with not more than 15 mol % of average silver bromide content at the surface of the grains. A method producing the silver halide photographic materials is also disclosed.

Abstract: A photographic element capable of forming a reversal image is disclosed having an emulsion layer containing a blend of spectrally sensitized tabular iodohalide grains and a second, slower fine grain population of a higher overall solubility silver salt content for increasing speed and contrast. A second dye is adsorbed to the surface of the second grain population to provide a further increase in threshold speed.

Abstract: This invention relates to a method of processing an image-wise exposed silver halide photographic material wherein said method comprises the following steps:(a) developing the photographic material for 5 to 15 seconds in an aqueous developing solution,(b) fixing the photographic material for 5 to 15 seconds in an aqueous fixing solution, and(c) washing the photographic material for 5 to 20 seconds,wherein both said developing and fixing solutions are free of gelatin hardeners.The method is particularly intended for use in processing radiographic films which:comprise a support and silver halide emulsion layer or layers, at least one of said silver halide emulsion layers containing tabular silver halide grains having an average diameter to thickness ratio of at least 3:1 and highly deionized gelatin, andshow a swelling index lower than 140% and a melting time of from 45 to 120 minutes.The method shows the advantages of lower environmental pollution and shorter processing times.

Abstract: A silver halide color light-sensitive material is disclosed, which-is improved in reproducibility of green color as well as orange color and sky blue color. The light-sensitive material comprises a support and a red-sensitive emulsion layer containing a cyan dye-forming coupler, a green-sensitive emulsion layer containing a magenta dye-forming coupler and a blue-sensitive emulsion layer containing a yellow dye-forming coupler provided on the support. The blue-sensitive silver halide emulsion layer has the maximum spectral sensitivity at a wavelength within the range of 415 nm to 430 nm and a spectral sensitivity of the blue-sensitive emulsion layer at 480 nm is not more than 35% of the maximum spectral sensitivity. The maximum spectral sensitivity and the spectral sensitivity at 480 nm are determined based on a reciprocal of light amount necessary for forming an image density of 0.7 above the minimum density of the blue-sensitive emulsion layer.

Abstract: A solid particle aqueous dispersion of a compound useful in imaging is prepared by milling an aqueous slurry of the compound in the presence of a fluorosurfactant. The resulting dispersion has improved stability to particle growth.

Abstract: A radiation detecting element, particularly a photographic element having a radiation detecting composition, in particular a silver halide emulsion. The composition provides the element with a wavelength of peak sensitivity, .lambda.peaksens, and a decreasing sensitivity around .lambda.peaksens. An absorber dye of defined characteristics is chosen, which has the effect of decreasing the change in sensitivity which the element otherwise has without the absorber dye (that is, the absorber dye increases the wavelength range over which the sensitivity is relatively constant). The element is preferably sensitive to infra-red.

Abstract: A novel red-sensitizing dye compound has a structure which contains a pentamethine oxonol chromophore linked to one or two cyanine chromophores. A photographic element comprises a support upon which is coated a silver halide emulsion layer comprising cubic silver halide crystals and said red-sensitizing dye compound.

Abstract: A photographic element is described with improved speed in the blue and ultra-violet region of the electromagnetic spectrum. The spectral response of the photographic element is enhanced with at least one dye represented by ##STR1## wherein A.sub.1 and A.sub.2 are hydrogen or taken together represent X--CH.dbd., wherein X is hydrogen, alkyl or substituted alkyl, substituted or unsubstituted five-member heterocyclic ring, substituted or unsubstituted six-member heterocyclic ring, aryl or an aryl substituted by at least one element chosen from the group consisting of alkyl, halogen, aryl, carbonyl, alkoxy, sulfonate, carboxy or triflouralkyl; Y is alkyl, aryl or COR wherein R is OH, NR.sup.2 or OM.sup.+, wherein R2 is hydrogen, alkyl, substituted alkyl, aryl or substituted aryl; wherein M+ is HNR.sup.3.sub.3.sup.+ or a metal cation, wherein R3 is hydrogen, alkyl or substituted alkyl, aryl or substituted aryl; Z is hydrogen, alkyl, substituted alkyl, aryl or substituted aryl.

Abstract: A silver halide color photographic material comprising: a support; at least a blue-sensitive emulsion layer, a green-sensitive emulsion layer, and a red-sensitive emulsion layer on the support, and one or more hydrophilic colloidal layers thereon containing a dispersion of microcrystals of at least one compound represented by general formulae (I), (II), (III), (IV), (V), and (VI); and at least one light-sensitive silver halide emulsion layer having a silver density (d) of 0.4 g/cm.sup.3 or more, wherein d is N/V; where N represents the total number of grams of silver in said one or more light-sensitive silver halide emulsion layers and V represents the cm.sup.3 of said light-sensitive silver halide emulsion layer.

Abstract: A photographic emulsion is disclosed in which a spectral sensitizing dye is adsorbed to the surface of octahedral silver bromide grains optionally containing iodide. The grains each contain a buried shell formed in the presence of a hexacoordination complex of iron and at least three cyanide ligands.

Abstract: A photographic emulsion is disclosed in which an infrared spectral sensitizing dye is adsorbed to the surface of silver bromide grains optionally containing iodide. The grains are formed in the presence of a hexacoordination complex of iron and at least three cyanide ligands to counteract dye desensitization.

Abstract: A method of preparing a superfine grain emulsion with a grain size of 0.05 .mu.m or less is provided, which includes mixing aqueous solutions of a water-soluble silver salt and a water-soluble halide with vigorous stirring inside a closed mixing device furnished with an agitator, where the solutions are fed into the device simultaneously and continuously, in the presence of at least one of a high molecular compound and a substance capable of adsorbing to silver halide, each of which has a physical retardance value of at least 40 as determined by PAGI method, and immediately expelling the newly-formed grains from the mixing device. Another method includes mixing the aqueous solutions in a mixing device as described above, immediately expelling the newly-formed grains from the device, and mixing the expelled grains with at least one of the above-described high molecular compound and substance.

Abstract: A silver halide photographic material composed of a support having thereon at least one silver halide emulsion layer containing substantially normal silver halide grains having a (111) plane and a (100) plane and capable of preferentially forming a latent image on the (100) plane; the (111) plane occupying at least about 40% of the surface of the grains or the (100) plane occupying more than about 60% of the surface of the grains; provided that when the (111) plane occupies at least about 40% of the surface of the grains, the grains are spectrally sensitized with (a) at least one spectral sensitizing dye selectively adsorbed more on the (100) plane than on the (111) plane, or (b) at least one spectral sensitizing dye selectively adsorbed more on the (111) plane than on the (100) plane.

Abstract: A process is disclosed of preparing an emulsion for photographic use comprised of silver halide grains and a gelatino-peptizer dispersing medium in which morphologically unstable tabular grains having {111} major faces account for greater than 50 percent of total grain projected area and contain at least 50 mole percent chloride, based on silver. The emulsion additionally contains at least one 2-hydroaminoazine absorbed to and morphologically stabilizing the tabular grains. Protonation releases 2-hydroaminoazine from the tabular grain surfaces into the dispersing medium. Released 2-hydroaminoazine is replaced on the tabular grain surfaces by adsorption of a photographically useful compound selected from among those that contain at least one divalent sulfur atom, thereby concurrently morphologically stabilizing the tabular grains and enhancing their photographic utility, and the released 2-hydroaminoazine is removed from the dispersing medium.

Abstract: A radiation sensitive emulsion is disclosed containing a silver halide grain population comprised of at least 50 mole percent chloride, based on silver, in which greater than 50 percent of the total grain projected area is accounted for by ultrathin tabular grains having a {111} crystal face stabilizer adsorbed to the major faces of the ultrathin tabular grains.

Abstract: A method of forming a direct positive color image by imagewise exposing a photographic material having at least one emulsion layer which contains previously non-fogged internal latent image-type silver halide grains, on a support, followed by color-developing the exposed material during or after fogging thereof, wherein the photographic material contains a color sensitizing dye and at least one compound or salt thereof which satisfies the condition-1 as defined in the specification. With the image formed by the method having an elevated maximum image density with a lowered minimum image density, and with the iamge-forming method displaying extremely excellent color reproducibility.

Abstract: A silver halide color photographic material comprising a reflective support and coated thereon at least one each of a cyan dye-forming silver halide emulsion layer, a magenta dye-forming silver halide emulsion layer and a yellow dye-forming silver halide emulsion layer, each of the emulsion layers containing substantially silver iodide-free silver chloride or silver chlorobromide and respectively having spectral sensitivity peaks in different wavelength regions, at least one of the emulsion layers containing silver halide grains having an average grain size of 0.35 .mu.m to 0.65 .mu.m and a silver halide content of 0.19 g Ag/m.sup.2 or less, the total silver amount in all the silver halide emulsion layers being 0.78 g/m.sup.

Abstract: A method of preparing a superfine grain emulsion with a grain size of 0.05 .mu.m or less is provided, which includes mixing aqueous solutions of a water-soluble silver salt and a water-soluble halide with vigorous stirring inside a closed mixing device furnished with an agitator, where the solutions are fed into the device simultaneously and continuously, in the presence of at least one of a high molecular compound and a substance capable of adsorbing to silver halide, each of which has a physical retardance value of at least 40 as determined by PAGI method, and immediately expelling the newly-formed grains from the mixing device. Another method includes mixing the aqueous solutions in a mixing device as described above, immediately expelling the newly-formed grains from the device, and mixing the expelled grains with at least one of the above-described high molecular compound and substance.

Abstract: A method for spectrally sensitizing silver halide emulsions is disclosed, comprising the step of adding a cyanine dye, which provides a J-band when added to silver halide emulsions, to a silver halide emulsion followed by ripening with such conditions that the relative quantum yield .phi..sub.r of spectral sensitization assumes a value of 1/2 or less of the .phi..sub.r of spectral sensitization obtained when the dye is added to the emulsion under ripening conditions of 40.degree. C. and 20 minutes from the time of addition of the dye to the emulsion until the time of coating the emulsion, and then ripening the silver halide emulsions. In one embodiment of the disclosed method, a heterocyclic compound which contains a mercapto group is added to the emulsion before the addition of the dye in an amount sufficient to increase the .phi..sub.r.

Abstract: A silver halide photographic emulsion including a spectrally sensitizing dye and at least one compound represented by general formula [I] or general formula [II] are disclosed. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.4 ', R.sub.5, R.sub.5 ', R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 represent hydrogen atoms or univalent organic residual groups.

Abstract: A process for improving the method by which a powder such as a dye is added to a gelatino silver halide element is described. This process involves encapsulating the powder within a gelatin capsule. This process avoids cross-contamination and dusting when powder is added to solvent and also reduces the use of extra solvent in the manufacture of the element.

Abstract: A silver halide color photographic light-sensitive material 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 layer, whereina maximum sensitivity wavelength .lambda..sub.R of a spectral sensitivity distribution of said red-sensitive silver halide emulsion layer is in a range of 595 nm.ltoreq..lambda..sub.R .ltoreq.625 nm;a maximum sensitivity wavelength .lambda..sub.G of a spectral sensitivity distribution of said green-sensitive silver halide emulsion layer is in a range of 530 nm.ltoreq..lambda..sub.G .ltoreq.560 nm; anda sensitivity of said green-sensitive silver halide emulsion layer at 500 nm is not less than one-fourth of the sensitivity at the maximum sensitivity wavelength .lambda..sub.G.