Abstract: Disclosed is a silver halide photographic material containing at least one methine compound of formula (I) or (II): ##STR1## wherein A.sub.1 : ##STR2## and wherein Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 each is an atomic group of forming a 5- or 6-membered N-containing heterocyclic ring; R.sub.1, R.sub.2 and R.sub.4 each is an alkyl group; R.sub.3 is an alkyl, aryl or heterocyclic group; D.sub.1, D.sub.1a, D.sub.2 and D.sub.2a each is an atomic group of forming an acidic nucleus; V.sub.1 to V.sub.22 each is a hydrogen or a monovalent substituent; L.sub.1 to L.sub.12 each is a methine group; M.sub.1 and M.sub.2 each is a charge-neutralizing pair ion; m.sub.1 and m.sub.2 each is a number of 0 or more for neutralizing the charge in the molecule; n.sub.1, n.sub.2 and n.sub.4 each are 0 or 1; and n.sub.3 and n.sub.5 each is an integer of 0 or more. The material has a high sensitivity and storage stability.

Abstract: A silver halide color photographic light-sensitive material is disclosed, which is excellent in color reproducibility and storability and has lowered color stain.

Abstract: A silver halide color photographic material comprising a support having on one side thereof at least one silver halide emulsion layer corresponding to each of the colors cyan, magenta, and yellow in which each of the colors cyan, magenta and yellow, respectively, are formed, wherein the layer which forms a magenta color is a green sensitive layer comprising (A) at least one coupler represented by formula (I) or formula (II) below ##STR1## wherein R.sub.1, R.sub.2, R'.sub.2 and X are as defined in the above specification and (B) silver halide grains which have been spectrally sensitized in such a way that they have a peak sensitivity between 540 nm and 555 nm by at least one spectrally sensitizing dye represented by the formulae (A), (B) and (C) below ##STR2## wherein W.sub.1, W.sub.2, V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, R.sub.21, R.sub.22, R.sub.23, R.sub.24, R.sub.25, R.sub.26, R.sub.27, R.sub.28, R.sub.29, Y, X.sub.1, X.sub.2, X.sub.

Abstract: Dyes and photographic elements containing them as silver halide sensitizing dyes, which dyes have the structure: ##STR1## wherein: X1 and X2 each independently represent the atoms necessary to complete a benzo-condensed 5- or 6-membered heterocyclic nucleus, which, in addition to being substituted by Z1 and Z2 respectively, may be further substituted or unsubstituted;n is a positive integer from 1 to 4,p and q each independently represents 0 or 1,each L independently represents a substituted or unsubstituted methine group,R1 and R2 each independently represents substituted or unsubstituted aryl or substituted or unsubstituted alkyl,Z1 represents a substituent which contains both an amide group and an aromatic ring which may be appended or fused to X1; andW1 is a counterion as needed to balance the charge of the molecule.

Abstract: Disclosed is a novel silver halide photographic material is provided comprising a support having thereon (a) a layer containing at least one methine compound represented by the following general formula (I) and (b) a layer containing at least one methine compound represented by the following general formula (II), (III), (IV) or (V): ##STR1## wherein the variables in the formulas are defined in the detailed description. In a preferred embodiment, the silver halide photographic material comprises at least one methine compound represented by general formula (I) and at least one methine compound represented by general formula (II) or (V) in the same layer.

Abstract: A silver halide photographic material, suitable for exposure using Helium/Neon laser or light-emitting diode, contains silver bromide grains capable of forming a surface-latent image, a binder, a dot quality-promoting amount of at least one compound of the Formula I, and an effective amount for sensitizing said grains in the red region of the spectrum only one optical sensitizer compound of the Formula II: ##STR1## wherein all the symbols are as defined in the specification.

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 adsorbed 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 benzimidazolium dye, 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 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 adsorbed 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 5-iodobenzoxazolium compound, thereby concurrently morphologically stabilizing the tabular grains and enhancing their photographic utility, and the released 2-hydroaminoazine is removed from the dispersing medium.

Abstract: Disclosed is a silver halide photographic material for medical use, in which the coated amount of silver per surface of the support is 2.8 g/m.sup.2 or less, the silver halide grains in the coated silver halide emulsion layer have a silver chloride content of 10 to 50 mol %, they contain 10.sup.-8 mol or more, per mol of silver, of an iridium compound and they have been spectrally-sensitized to be sensitive to rays of from 600 to 700 nm wavelength range. The material may be processed by rapid processing and has a high sensitivity and high covering power. Also disclosed is a silver halide photographic material for laser exposure, in which the emulsion contains 10.sup.-8 mol or more, per mol of silver, of an iridium compound and is spectrally-sensitized with a sensitizing dye of formula (III): ##STR1## where V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, V.sub.7 and V.sub.

Abstract: Disclosed herein is a silver halide photographic light-sensitive material having at least one silver halide emulsion layer formed on a support. Said light-sensitive material having at least one layer contains a regular silver halide emulsion, a tabular silver halide emulsion containing tabular silver halide grains having an average diameter/average thickness ratio of 2 or more, which occupy 50% or more of the total projected area of all silver halide grains, and a silver halide emulsion containing internal latent-image silver halide grains each chemically sensitized to the depth of less than 0.02 .mu.m from the surface of the grain. Each of these emulsions contains at least one methine compound represented by the following formula (I): ##STR1## where R.sup.1 is --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sub.3 or --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sub.4, where R.sup.3 and R.sup.4 are an alkyl group, r and s are an integer ranging from 1 to 5; R.sup.2 is a sulfoalkyl group; Z.sup.1 and Z.sup.

Abstract: There is disclosed a method for forming an X-ray image formed with less exposure than is customary and having an excellent resolution. The X-ray image can be formed by subjecting a light-sensitive material comprising a support, having provided thereon a light-sensitive silver halide emulsion layer containing a silver halide emulsion sensitized with a sensitizing dye represented by the following Formula (I) on only one side of the support to photographing via a green color emission fluorescent screen with a soft X-ray emitted from an X-ray generating device with a tube voltage of 25.sup.kv to 40.sup.kv. In the characteristic curve represented by a rectangular coordinate constituted by optical density and logarithmic exposure, the average gradation shown by the gradient of a line drawn by connecting the point at which 0.25 is added to the minimum density (hereinafter referred to as Dmin) to the point at which 2.0 is added to Dmin is set at 2.8 to 3.

Abstract: A silver halide color photographicmaterial capable of providing an excellent rapid processing property and sharpness as well as forming little stain on a background after processing.

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 adsorbed to and morphologically stabilizing the tabular grains. A silver salt is epitaxially deposited epitaxially at one or more corners of the tabular grains. Protonation releases 2-hydroaminoazine from the tabular grain surfaces into the dispersing medium.

Abstract: A color photographic element which contains a color correction layer above at least one red sensitive layer of the element results in an element having excellent color reproduction.

Abstract: A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material comprises a support, having thereon a red sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a blue-sensitive silver halide emulsion layer, wherein the red-sensitive comprises a low-speed red-sensitive silver halide emulsion sublayer, a medium-seed red-sensitive silver halide emulsion sublayer and a high-speed red-sensitive silver halide emulsion layer provided in this order from the support, and sensitivities S.sub.600, S.sub.620, S.sub.640, S.sub.660 and S.sub.680 of the medium speed red-sensitive emulsion sublayer which are each determined as reciprocal of the exposure amount of light of wavelength of 600 nm, 620 nm, 640 nm, 660 nm and 680 nm necessary for forming an image having a density of fog+0.1 in the medium speed red-sensitive emulsion sublayer, respectively, satisfy the following relation;0.5S.sub.640 <S.sub.600 < 0.9S.sub.640,0.7S.sub.640 <S.sub.

Abstract: A dry process silver salt photosensitive member is disclosed. The photosensitive member has a heat-developable photosensitive element containing at least (1) and organic silver salt, (2) a reducing agent, and (3) at least one of a photosensitive silver halide and a photosensitive silver halide-forming component on a support. The heat-developable photosensitive element further contains a compound represented by the general formula (I) and a compound represented by the general formula (II).

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: There is provided a silver halide color photographic light-sensitive material whose green-sensitive and red-sensitive layers are improved in sensitivity and which involves little variation among printers.

Abstract: Disclosed is a light-sensitive silver halide photographic material having at least one silver halide emulsion layer on a support, wherein (1) the silver halide emulsion is spectrally sensitized by a red-sensitive sensitizing dye and contains a macrocyclic compound having at least one hetero atom, (2) a number of aliphatic rings forming the macrocyclic compound is 4 or less, and (3) the macrocyclic compound has an aromatic ring, which has good aging storage stability and excellent safelight safety characteristics, and can provide high sensitivity stably.

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: There is disclosed a silver, halide photographic light-sensitive material having a high sensitivity and gradation as well as a low fog while exhibiting an excellent aging stability. The light-sensitive material has at least one silver halide emulsion layer on a support, wherein the emulsion is spectrally sensitized at a pH of 5.3 to 6.0 by adding at least one of an oxacarbocyanine dye represented by the following formula (I) to the emulsion before the addition of a chemical sensitizer and thereafter chemically sensitized by adding a chemical sensitizer. A compound represented by the following formula (II) is present in the emulsion layer or a layer adjacent thereto: ##STR1## wherein the substituents are as defined in the specifications.

Abstract: Disclosed is 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, wherein at least one of green-sensitive silver halide emulsion layers contains at least one of colored magenta couplers represented by Formula CM-1 and at least one of dyes having absorption maximum at 590 nm to 610 nm is contained in at least one of layers selected from the layers consisting of silver halide emulsion layers and photographic constitution layers; ##STR1## wherein R.sub.1 represents a substituent, R.sub.2 represents an acylamino group, a sulfonamide group, an imide group, a carbamoyl group, a sulfamoyl group, an alkoxyl group, an alkoxycarbonyl group, an alkoxycarbonylamino group, R.sub.3 represents a halogen atom, an alkoxy group, m is an integer of 0 to 5, n is an integer of 0 to 4.

Abstract: Silver halide photographic elements which are capable of high-contrast development and are especially useful in the field of graphic arts comprise surface latent image forming high-chloride silver halide grains and have incorporated therein a hydrazine compound which functions as a nucleator, an amino compound which functions as an incorporated booster, and a benzimidazolocarbocyanine sensitizing dye that provides enhanced photographic sensitivity yet leaves substantially no sensitizing dye stain after rapid access processing.

Abstract: The present invention provides dyes markedly excellent as sensitizing dyes for silver halide photographic light-sensitive materials. Said dyes are represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 may be identical or different and each represents an alkyl group, an aralkyl group, an alkenyl group or an aryl group, R.sub.3 represents a heterocyclic group, Z.sub.1 and Z.sub.2 may be identical or different and each represents a group of atoms necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring, X represents a counter ion, L.sub.1 to L.sub.5 each represents a methine group, and m and n each represents 0, 1 or 2.

Abstract: A variable contrast photographic element containing a light sensitive silver halide emulsion layer is disclosed wherein the silver halide is sensitized with a benzimidazolooxacarbocyanine dye of the following formula (I) in an amount less than that required to impart maximum sensitivity to all of the silver halide in the emulsion. ##STR1## In formula (I), R.sup.1, R.sup.2, R.sup.6 and R.sup.7 each independently represent hydrogen, halogen, hydroxy, or substituted or unsubstituted alkyl, alkenyl, alkoxy, alkylamino, alkylthio, aryl, aryloxy, arylamino, or arylthio. R.sup.3 and R.sup.4 each independently represent substituted or unsubstituted alkyl. R.sup.5 represents a substituent containing an electron withdrawing group. X represents a counterion as needed to balance the charge of the molecule. Use of dyes of formula (I) having an R.sup.

Abstract: Dyes of formula (I) below are described. The dyes are useful as mid-green sensitizing dyes for photographic materials ##STR1## In the above formula, R1 and R3 are methyl or ethyl, at least one of R1 and R3 being methyl. R2 and R4 are substituted or unsubstituted C.sub.1 to C.sub.6 alkyl, provided that R2 and R4 are not both methyl. X1, X2, X3, and X4 are each independently methyl, methylthio, fluoro-substituted methyl or methylthio, or hydrogen, provided that at least one of X1 and X2 and at least one of X3 and X4 are not hydrogen. Y represents an ion as needed to balance the charge of the molecule. The dyes of formula (I) sensitize silver halide to light in the mid-green region of the spectrum.

Abstract: A silver halide color photographic light-sensitive material is provided which comprises 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, having a spectral sensitivity distribution such that a wavelength weight-averaged in spectral sensitivity distribution of the red-sensitive silver halide emulsion layer is within a range of 595 to 625 nm; a maximum sensitivity wavelength in spectral sensitivity distribution of the blue-sensitive silver halide emulsion layer is within a range of 415 to 470 nm; and a sensitivity of the blue-sensitive silver halide emulsion layer at 480 nm does not exceed 35% of the sensitivity at the maximum sensitivity wavelength. The color photographic material makes it possible to faithfully reproduce the hues such as purple colors and green colors.

Abstract: A silver halide photographic emulsion which contains at least one of the compounds represented by the following general formula (I) each having a maximum value of spectral sensitivity in a wavelength of 520 nm or more and less than 545 nm, as a sensitizing dye. ##STR1## wherein R.sub.0 and R.sub.1 may be the same or different, and represent hydrogen atoms, unsubstituted or substituted alkyl groups, unsubstituted or substituted aryl groups, unsubstituted or substituted alkoxy groups, unsubstituted or substituted aryloxy groups, halogen atoms, unsubstituted or substituted alkoxycarbonyl groups, unsubstituted or substituted acylamino groups, unsubstituted or substituted acyl groups, cyano groups, unsubstituted or substituted carbamoyl groups, unsubstituted or substituted sulfamoyl groups, carboxyl groups, or unsubstituted or substituted acyloxy groups, provided that R.sub.0 and R.sub.1 do not represent hydrogen atoms at the same time; R.sub.

Abstract: A radiographic element is disclosed comprised of a transparent film support and spectrally sensitized tabular grain silver halide emulsion layer units coated on opposite sides of the film support. At least one of the emulsion layer units is comprised of tabular grains having a thickness of less than 0.2 micrometer accounting for greater than 50 percent of total grain projected area and exhibiting an average tabularity of greater than 25. Adsorbed to the surface of the tabular grains is at least one benzimidazolocarbocyanine dye chosen for its high level of absorption in the mid-green spectral region at the emission line of gadolinium oxysulfide, terbium activated intensifying screens and its low residual stain in the fully processed film.

Abstract: A negative silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer containing a silver halide emulsion containing regular silver halide grains containing from 0.3 mol % to 3.0 mol % of silver iodide, the silver halide grains being produced by conversion of silver halide host grains using high silver iodide silver halide grains having a silver iodide content of at least 90 mol % in an amount sufficient to provide from 0.1 mol % to 2.5 mol % of silver iodide based on the total silver halide content of the silver halide host grains and the high silver iodide grains.The photographic material containing silver halide grains having a novel structure provides a negative image having excellent photographic characteristics, particularly high sensitivity and ultrahigh contrast.A method of forming an ultrahigh contrast image which is excellent in line image quality using a stable developing solution is also disclosed.

Abstract: A silver halide color photographic material comprising a support having thereon at least three silver halide emulsion layers which have different color sensitivities from each other, wherein at least one of the silver halide emulsion layers contains at least one magenta coupler represented by general formula (I) shown below, at least one of the silver halide emulsion layers contains at least one compound represented by general formula (II) shown below, at least one of the silver halide emulsion layers contains at least one compound represented by general formula (III) shown below and the pH of the layers of the silver halide color photographic material is from 5.0 to 6.5: ##STR1## wherein R.sup.1, X, Za, Zb, Zc, Q, M, Z, R.sub.4, R.sub.5, V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, B.sub.7, V.sub.8, and X.sub.n are defined in the specification.

Abstract: Disclosed are silver halide photographic materials, comprising a support having thereon a layer which contains a compound represented by the following general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 each represents groups of atoms which are required to complete aromatic rings, which may be substituted or unsubstituted; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a phenyl group, a five- or six-membered heterocyclic group, an acyl group or an alkoxy group, which may be substituted or unsubstituted; R.sub.5 and R.sub.6 each independently represents an alkyl group, a phenyl group or a five- or six-membered heterocyclic group, which may be substituted or unsubstituted; X represents a p-valent anion; p represents 1, 2 or 3; L represents a methine group which may be substituted or unsubstituted, or a trivalent linking group wherein three, five or seven methine groups are linked by conjugated double bonds; and X may be bonded to A.

Abstract: A silver halide color photographic light-sensitive material which offers high chroma and excellent hue reproduction comprises 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, wherein the maximum sensitivity wavelength .lambda..sub.B of a spectral sensitivity distribution of said blue-sensitive silver halide emulsion layer is in the range of 410 nm.ltoreq..lambda..sub.B .ltoreq.470 nm; and the sensitivity of said blue-sensitive silver halide emulsion layer at 480 nm is not more than half of the sensitivity at said wavelength .lambda..sub.B. Preferably, the maximum sensitivity wavelength .lambda..sub.G of said green-sensitive layer is in the range of 530 nm.ltoreq..lambda..sub.G .ltoreq.560 nm and the sensitivity of said green-sensitive layer at the wavelength of 500 nm is not less than one-fourth of the sensitivity at SG.sub.max ; the maximum sensitivity wavelength .lambda..sub.

Abstract: The present invention relates to a silver halide photographic material having one or more light-sensitive silver halide emulsion layers on a support, which said photographic material is characterized in that at least one of said light-sensitive emulsion layers contains silver halide grains that are spectrally sensitized with at least one of the spectral sensitizers represented by the following general formula (I) and further contains at least one of the compounds represented by the following general formulas (II) and (III): ##STR1## wherein the variables are as defined in the specification.

Abstract: Sensitizing dyes for photographic materials are disclosed. The dyes have the formula: ##STR1## Z.sub.1 represents the atoms necessary to complete a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a benzotellurazole nucleus, or a benzimidazole nucleus, which, in addition to being substituted by R.sub.3, may be further substituted or unsubstituted,Z.sub.2 represents the atoms necessary to complete a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a benzotellurazole nucleus, or a benzimidazole nucleus, which, in addition to being substituted by F, may be further substituted or unsubstituted,R represents H or substituted or unsubstituted alkyl or aryl,R.sub.1 and R.sub.2 each independently represents substituted or unsubstituted alkyl or aryl,R.sub.3 represents an aryl group that may be appended to or fused with Z.sub.1, andX is a counterion as needed to balance the charge of the molecule.

Abstract: Disclosed is a silver halide photographic light-sensitive material which has a hydrophilic colloid layer containing at least one of the dyes represented by the following formulas (I) and (II): ##STR1## wherein R.sup.1 and R.sup.2 may be identical or different and each represents an alkyl group; Y.sup.1 and Y.sup.2 may be identical or different and each represents a group of atoms necessary to form a hydrocarbon ring together with the carbon atom at 3-position of indole ring; L represents a methine group; the dye molecule has at least three acid substituents; X.sup..theta. represents an anion; and n is 1 or 2 and is 1 when the dye form an inner salt, ##STR2## wherein R.sub.1 and R.sub.2 may be identical or different and each represents a substituted or unsubstituted alkyl group; Z.sub.1 and Z.sub.2 each represents a group of non-metallic atoms necessary to form a substituted or unsubstituted benzo condensed ring or naphtho condensed ring, with a proviso that R.sub.1, R.sub.2, Z.sub.1 and Z.sub.

Abstract: Silver halide photographic material having a hydrophilic colloidal layer that contains at least one cyanine dye with a 3H-pyrolopyridine, 4H-thienopyrrole, 6H-thienopyrrole, 4H-furopyrrole or 6H-furopyrrole nucleus which has in its dye molecule at least two acid groups or at least two substituents each having at least one --CH.sub.2 CH.sub.2 OR group (where R is a hydrogen atom or an alkyl group).

Abstract: A silver halide color photographic material comprising photographic constituent layers containing at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer on a reflective support, wherein at least one of the photographic constituent layers comprises at least one dye represented by formula (I), at least one of the light-sensitive silver halide emulsion layers comprises silver halide grains substantially comprising silver chloride and the reflective support comprises 3.0 g/m.sup.2 or more of titanium oxide: ##STR1## wherein R.sub.1 and R.sub.2 each represents an alkyl group, an aryl group, a cyano group, --COOR.sub.5, --CONR.sub.5 R.sub.6, --COR.sub.7, --SO.sub.2 R.sub.7, --SOR.sub.7, --SO.sub.2 NR.sub.5 R.sub.6, --OR.sub.5, --NR.sub.5 R.sub.6, --NR.sub.6 COR.sub.7, --NR.sub.5 CONR.sub.5 R.sub.6 or --NR.sub.6 SO.sub.2 R.sub.7 in which R.sub.5 and R.sub.6 each represents a hydrogen atom, an alkyl group or an aryl group, R.sub.

Abstract: A process or the preparation of a silver halide photographic emulsion is provided which comprises the addition of at least one pendant type spectral sensitizing dye containing as a substituent a compound having the effect of inhibiting fog at any time after the formation of silver halide grains, but before the completion of the chemical ripening process. In a preferred embodiment, the addition of said pendant type spectral sensitizing dyes is effected at any time after the formation of silver halide grains, but before former one second of the total time of the chemical ripening process. The pendant type spectral sensitizing dyes are compounds represented by the general formula (III) or (IV): ##STR1## wherein SSD represents a sensitizing dye portion; AF represents a compound portion containing a saturated or unsaturated 5- to 7-membered ring containing at least one nitrogen atom; L.sup.1 represents a divalent connecting group containing at least one of C, N, S and O; L.sup.2 has the same meaning at L.sup.

Abstract: A gradation variable black-and-white paper containing only one light sensitive silver halide emulsion layer in which transfer of sensitization is prevented may be obtained by sensitization with at least one compound corresponding to the following formula ##STR1## in which at least one of the groups R.sub.1, R.sub.5 or R.sub.6 is halogen.

Abstract: A silver halide photographic material is disclosed, comprising a support having thereon an emulsion layer comprising a dispersion medium, silver halide grains, and a pendant type sensitizing dye, wherein said pendant type sensitizing dye is a compound comprising a sensitizing dye and an antifoggant, each of which may have substituent groups and wherein said sensitizing dye and antifoggant are organochemically bonded.

Abstract: A silver halide photographic emulsion containing at least one of the compounds of formula (I) and at least one of the compounds of formula (III), or further containing at least one of the compounds of formula (II) besides the above at least two compounds: ##STR1## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10 and R.sub.11 each represent various groups; X.sub.1.sup..crclbar., X.sub.2.sup..crclbar. and X.sub.3.sup..crclbar. each represent counter anions; l, m and n are each 0 or 1; Z.sub.1 and Z.sub.2 each represent nonmetal atomic groups necessary for forming unsubstituted or substituted benzene rings, or unsubstituted or substituted naphthalene rings; and Z.sub.3 and Z.sub.4 each represent nonmetal atomic groups necessary for forming unsubstituted or substituted naphthalene rings.

Abstract: A heat-developable light-sensitive material comprising a support having provided thereon a light-sensitive layer comprising a silver halide which is spectrally sensitized with at least one dye represented by formula (I): ##STR1## wherein R.sub.0 and R.sub.1, which may be the same or different, each represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a halogen atom, an alkoxycarbonyl group, an acylamino group, an acyl group, a cyano group, a carbamoyl group, a sulfamoyl group, a carboxyl group, or an acyloxy group; provided that at least one of R.sub.0 and R.sub.1 represents a group other than a hydrogen atom; R.sub.2 represents a hydrogen atom, an alkyl group, or an aryl group; R.sub.3 represents an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an acyl group, an acyloxy group, an alkoxycarbonyl group, or an acylamino group; provided that when R.sub.3 represents an aryl group, R.sub.0 and R.sub.

Abstract: A silver halide color photographic light-sensitive material includes a support having thereon at least one silver halide emulsion layer, wherein the emulsion layer contains a silver halide emulsion which comprises silver halide grains consisting of at least 50 mol % of silver chloride and contains at least one of the compounds represented by formulas [I] to [III]: ##STR1## wherein Z represents alkyl (the number of carbon atoms is 1 to 18), aryl (the number of carbon atom is 6 to 18), or heterocyclic,Y represents an atom group required for forming heterocyclic or aryl (the number of carbon atoms of the aryl is 6 to 18),M represents metal cation, organic cation, or hydrogen atom, andn represents an integer from 2 to 10.

Abstract: Disclosed is a photographic spectral sensitizing dye represented by the following formula (I), (II) or (III): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.5 or R.sub.7 each represents an alkyl group, an aralkyl group or an alkenyl group, R.sub.4 and R.sub.6 each represents an alkyl group, aralkyl group, an alkenyl group or an aryl group, L.sub.1 -L.sub.22 each represents a methine group, Z.sub.1 -Z.sub.4 each represents a group of atoms necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring, X.sub.1.sup.- and X.sub.2.sup.- each represents an acid anion and l, m, n, p, q, r, s, t and u each represents an integer of 1 or 2.Silver halide photographic emulsion containing the above sensitizing dye is also disclosed.

Abstract: A photographic element and emulsion are described which comprise a negative working silver halide emulsion layer, a hydrazine compound nucleating agent and an electron accepting antifogging dye. Enhanced sensitometric properties are obtained. A process for developing such element or emulsion is also described.

Abstract: A novel silver halide photographic material is provided comprising a support having provided thereon at least one silver halide emulsion layer and containing at least one polyoxyethylenic compound in the emulsion layer or at least one other hydrophilic colloid layer, wherein silver halide grains contained in the emulsion layer are chemically sensitized in the presence of a water-soluble sensitizing dye having a solubility in 20.degree. C. water of 0.2 g/100 ml H.sub.2 O or more, or said water-soluble sensitizing dye is added to the silver halide emulsion after chemical sensitization and before coating. Such a water-soluble sensitizing dye is preferably selected from methine dyes and styryl dyes such as a cyanine dye, a merocyanine dye, a hemicyanine dye, a rhodacyanine dye, an oxonol dye, and a hemioxonol dye.

Abstract: A silver halide photographic emulsion which contains at least one of the compounds represented by the following general formula (I), and at least one compound selected from the group consisting of the compounds represented by the general formula (II) and the compounds represented by the general formula (III): General formula (I) ##STR1## wherein R.sub.0 and R.sub.1 may be the same or different, and represent hydrogen atoms, alkyl, aryl, alkoxy, aryloxy groups, halogen atoms, alkoxycarbonyl, acylamino, acyl, cyano carbamoyl, sulfamoyl, carboxyl, or acyloxy groups under the condition that R.sub.0 and R.sub.1 do not represent hydrogen atoms at the same time; R.sub.2 represents a hydrogen atom, alkyl, or aryl, R.sub.3 represents alkyl, aryl, alkoxy, aryloxy, acyl, acyloxy, alkoxycarbonyl, or acylamino group and moreover R.sub.3 is required to be a substituent having such L and B that S value is 544 or less in the equation ofS=3.536L-2.661B+535.4wherein L (its unit is .ANG.

Abstract: A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and a cationic dye-borate anion complex, said complex being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said compound; and photosensitive materials employing the composition where in one embodiment the composition is microencapsulated.

Abstract: A silver halide photographic material which is improved in storage stability comprises a support having thereon a silver halide emulsion layer, wherein said emulsion layer contains at least one of sensitizing dyes represented by the following formula [I-a] and [I-b] and at least one of compounds represented by formula [II]: ##STR1##