Abstract: A near-infrared-ray absorbing material containing a cyanine compound per formula (I) exhibits a sharp light absorption in wavelength range 800-1000 nm, with excellent light resistance. R1 - R4, Y1, Y2 represents hydrogen atom, a group of formula (II) or (II?), etc., and Anq? represents a q-valent anion, provided that at least R1 is a group of formula (II) or (II?) or Anq? is an ion of formula (III); R11 - R13 each represents a hydrogen atom, hydroxyl group, etc.; Z1, Z2 represents a C1-10 alkyl group, etc. In formula (II?), the bond between G? and T? is a double bond or a conjugated double bond; G? represents a carbon atom; T? represents a carbon atom or a nitrogen atom; the ring including G? and T? represents a 6-membered ring, etc.; w? is 0-4; and R01? represents a hydrogen atom, hydroxy, etc. In formula (III), R5 and R6 represents a halogen-substituted C1-8 alkyl group.

Abstract: Disclosed is a silver halide photographic material which comprises at least one methine dye represented by the following formula (I): wherein Y represents a furan ring or a pyrrole ring, and Y may further be condensed with other 5- or 6-membered carbocyclic ring or heterocyclic ring, or may have a substituent; the bond between two carbon atoms in which Y is condensed may be a single bond or a double bond; Z represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring, and Z may further be condensed with other 5- or 6-membered carbocyclic ring or heterocyclic ring; R represents a substituted or unsubstituted alkyl group, aryl group, or heterocyclic group; D represents a group necessary to form a methine dye; L1 and L2 each represents a methine group; p represents 0 or 1; M represents a counter ion; and m represents a number of 0 or higher necessary to neutralize the charge in the molecule.

Abstract: A photothermographic material comprising a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for a silver ion and a binder on one surface of a support, wherein a silver behenate-content of the non-photosensitive organic silver salt is 40 to 70 mol %, and the photothermographic material comprises a compound that can be one-electron-oxidized to provide a one-electron oxidation product, which further releases at least 1 electron, one of during and after a subsequent reaction.

Abstract: A silver halide photographic light-sensitive material having high sensitivity and having a desired spectral sensitivity distribution. A silver halide photographic light-sensitive material comprising at least one multichromophore dye compound having at least two dye chromophores connected by covalent bonding or coordinate bonding, at least two of the dye chromophores forming a dye chromophore group and the light absorption of the dye chromophore group differing from the sum of individual light absorptions of respective dye chromophores constituting said dye chromophore group.

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

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

Abstract: Methine dye compounds represented by formula (1) and highly sensitive silver halide photographic materials containing these compounds:

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

Abstract: There is disclosed a process for making a lithographic printing plate, which comprises subjecting a lithographic printing material having at least a silver halide emulsion layer and a physical development nuclei layer on a support and having a sensitivity at a wavelength of 400 nm to 440 nm of 20 &mgr;J/cm2 or less, and having substantially no sensitivity at a wavelength of 450 nm or longer to scanning exposure by a scanning type exposure device on which a violet laser diode is mounted, and then subjecting to developing treatment.

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: 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: Disclosed is a compound represented by the following formula (I): 1

Abstract: A Silver halide photographic material high in sensitivity and decreased in residual color is disclosed, which comprises at least one compound represented by the following formula (I): wherein Z1 represents an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, a carbon atom or a nitrogen atom; Q represents a group necessary for forming a methine dye; M1 represents a charge equilibrium counter ion; m1 represents the number necessary for neutralizing a charge of the molecule; Vp represents a group having a log P value lower than that of Cl; q1 represents 1, 2, 3 or 4; and R1 is represented by following: R1=(La)k1CONHSO2R11, R1=(Lb)k2SO2NHCOR12, R1=(Lc)k3CONHCOR13, R1=(Ld)k4SO2NHSO2R14 wherein R11, R12, R13 and R14 each represents an alkyl group, an aryl group, a heterocyclic group, an alkoxyl group, an aryloxy group, a heterocyclyloxy group or an amino group; La, Lb, Lc and Ld each represents a methylene group; and k1, k2, k3 a nd k4 each represents a

Abstract: Disclosed is a compound represented by the following formula (I): wherein Z1 represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; Z2 represents an atomic group necessary to form a 5- or 6-membered heterocyclic ring, Z2 may further be substituted, or may be condensed with a hetero ring or a benzene ring; R1 represents a hydrogen atom, a halogen atom, a mercapto group, an alkyl group, an alkenyl group, an aryl group, an alkylthio group, an alkenylthio group, or an arylthio group; L1 and L2 each represents a methine group; p1 represents 0 or 1; V1 represents a substituent; and n represents 0, 1 or 2, and when n represents 2, a plurality of V1 may be the same or different.

Abstract: This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith a combination of two or more dyes wherein (b) (a) a dye having at least one substituent that has a negative charge is present, a dye having at least one substituent that has a positive charge is present, wherein at least one of the dyes is further substituted with at least one hydrogen bonding donor substituent. In a preferred embodiment, at least one of the dyes is substituted with at least two hydrogen bonding donor substituents. In another preferred embodiment a silver halide photographic material comprises at least one silver halide emulsion comprising silver halide grains having associated therewith a dye substituted with at least one guanidinium, amidinium, or imine of urea substituent.

Abstract: The invention is directed to a process for the preparation of polymer laminated base paper, said process comprising laminating a base paper web on at least one side thereof with at least one polymer layer by extrusion-coating at a coating speed of 300 m/min or more, wherein the said base paper web is heated prior to laminating.

Abstract: This invention comprises a photographic element comprising a support and at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula:Q-XYwherein Q represents the atoms necessary to form a chromophore comprising an amidinium-ion, a carboxyl-ion or dipolar-amidic chromophoric system when conjugated with XY, and XY is a fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:1) XY has an oxidation potential between 0 and about 1.4 V;2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.cndot. has an oxidation potential <-0.7V.

Abstract: A photoconductor for electrophotography includes a photoconductive layer that contains titanyloxyphthalocyanine as a charge generation agent. The concentration of SO.sub.4.sup.2- with respect to the concentration of titanyloxyphthalocyanine is adjusted to be less than or equal to 500 ppm. The photoconductor may be of either a monolayer or a laminate construction. In the case of a laminate type photoconductor, the titanyloxyphthalocyanine is incorporated into the charge generation layer.

Abstract: An electrophotographic photoconductor comprises a charge generation layer containing a phthalocyanine compound as a charge generation material and a charge transfer layer containing a charge transfer material of a hole transfer type, the charge generation layer and the charge transfer layer are laminated on a conductive support, wherein the charge generation layer has an ionization potential of at least 5.6 eV.

Abstract: A method of manufacturing an organic pigment including the steps of providing an organic pigment wet cake which includes at least an organic pigment and a solvent and drying the organic pigment wet cake while the wet cake is heated at a temperature higher than room temperature to prepare a powder of the organic pigment, wherein the organic pigment is present in the organic pigment wet cake in an amount of not greater than about 70% by weight.

Abstract: An organic electrophotographic photoconductor diminished in an image trouble due to history of a transfer process in a reversal development system is disclosed. The above organic electrophotographic photoconductor is called a separated-function laminated type organic electrophotographic photoconductor, which has an undercoat layer and a photosensitive layer laminated in this order on a conductive substrate, the photosensitive layer comprising a charge generation layer laminated on the undercoat layer and containing an organic compound, and a charge transport layer laminated on the charge generation layer and containing an organic compound. For the charge generation layer, a titanyloxyphthalocyanine compound is used as a charge generation material. The present invention uses the titanyloxyphthalocyanine compound having a clear diffraction peak at a Bragg angle (2.theta.) of 9.6.degree..+-.0.2.degree. or 27.3.degree..+-.0.2.degree. for CuK.alpha. characteristic X-ray (wavelength 1.541 .ANG.).

Abstract: A di-substituted alkylene glycolate titanium phthalocyanine compound comprising a reaction mixture of a threo-alkanediol having one hydroxy group per each of the two adjacent carbon atoms, said carbon atoms each being a secondary carbon atom, and an oxytitanium phthalocyanine compound, and an organic photoconductor comprising the di-substituted alkylene glycolate titanium phthalocyanine compound are disclosed.

Abstract: A photoconductor for use in electrophotographic reproduction devices is disclosed. The photoconductor provides simultaneous improvement in both photoreceptor sensitivity and fatigue, while also providing higher charge voltage, lower residual voltage and lower dark decay. The photoconductor of the present invention includes simple quinone additives in either the charge generation layer, the charge transport layer, or both layers. Quinone additives are preferably selected from o-quinone, duroquinone, diphenoquinone, naphthaquinone, and mixtures of those materials, with duroquinone and the mixture E+Z 3, 3'-di-t-butyl-5, 5'-dimethyl diphenoquinones being preferred.

Abstract: Charge generation layers comprise a type I polymorph of titanyl phthalocyanine prepared by pre-milling a type IV polymorph in a media mill. Dual layer photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer.

Abstract: A photoconductive drum of an aluminum substrate and a blend of polyvinylbutyral and one or a blend of phenoxy resin, epoxy novolac resin, and epoxy capped polymers which are derivatives of bisphenol and epichlorohydrin. The blend enhances the electrical properties.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a polymetallosiloxane.

Abstract: A photoconductive element comprising an electrically conductive support and at least one active layer, said active layer comprising N-(p-(di-p-tolylamino)phenyl)-N'-(1,2-dimethylpropyl)-1,4,5,8-naphthalenet etracarboxylic diimide and one or more perylene dyes of structure I: ##STR1## wherein R.sub.1 and R.sub.2 are, each independently, ##STR2## and R.sub.3, R.sub.4, 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 are, each independently, H, CH.sub.3, or C.sub.2 -C.sub.4 alkyl, linear or branched.

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

Abstract: This invention comprises a photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula X--H, wherein X is an electron donor moiety to which a base, B.sup.-, is covalently linked and H is a leaving hydrogen atom, and wherein:1) X--H has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--H undergoes deprotonation reaction with the base B.sup.-, to give the radical X.sup..cndot. and the protonated base B-H.In a preferred embodiment of the invention, the radical X.cndot. has an oxidation potential <-0.7V.

Abstract: A highly sensitive silver halide photographic material is described, which comprises at least one light-sensitive silver halide emulsion layer comprising at least one hemicyanine, hemioxonol, bishemicyanine or bishemioxonol dye having a particular structure and silver halide grains having an aspect ratio of from 3 to 50 or which comprises at least one light-sensitive silver halide emulsion layer comprising at least one bishemicyanine dye having a particular structure and silver halide grains at least 50%, based on projected area, of which are grains having a silver chloride content of at least 50 mole % and an outer surface at least 50% of which is constituted of (111) faces.

Abstract: An electrophotographic photoreceptor is disclosed. It comprises a photosensitive layer on an electrically conductive support and the photosensitive layer contains at least one compound of 0.001 to 10 weight percent selected from dioxolan and dioxolan derivatives, and titanylphthalocyanine or titanylphthalocyanine/vanadylphthalocyanine mixed crystal.

Abstract: Oxonol dyes of the formula I ##STR1## in which R.sub.1, R.sub.2 mean an optionally substituted furyl or thienyl group,R.sub.3, R.sub.4 mean an aryl group substituted with at least two sulpho groups,L means CH or CR.sub.5,R.sub.5 means C.sub.1 -C.sub.4 alkyl andn means 0, 1 or 2,give rise in a photographic material to an improvement in sharpness.

Abstract: A photographic element having a light sensitive layer and containing a dye of the formula (I): ##STR1## wherein: X.sub.1 and X.sub.2 each independently represents the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus;X.sub.3 represents the atoms necessary to form a 5- or 6-membered ring structure, which may be substituted;R.sub.1 and R.sub.2 each independently represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;R.sub.3 represents H, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;r and s independently are 0 or 1; andW represents one or more counterions as needed to balance the charge of the molecule.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material comprises a substrate provided thereon with at least one silver halide emulsion layer comprising at least one compound represented by the following Formula (I): ##STR1## wherein Ra and Rb each represents a hydrogen atom, an alkyl group having at least two carbon atoms or an aryl or heterocyclic group, provided that Ra and Rb do not simultaneously represent hydrogen atoms; La and Lb each represents a methylene group; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; Z.sub.1 represents an atomic group required for forming a 5- or 6-membered nitrogen atom-containing heterocyclic ring; M.sub.1 represents a counterion required for balancing the electrical charge; m.sub.1 represents a numerical value of not less than 0 required for neutralizing the molecule; and Q represents a methine or polymethine group required for forming a methine dye.

Abstract: A photographic element comprises a support and at least one silver halide emulsion layer in which the silver halide is sensitized with a fragmentable electron donor of the formula X--Y, wherein X is an electron donor moiety and Y is a leaving group other than hydrogen, and wherein:1) X--Y has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--Y undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.

Abstract: A silver halide photographic element comprises a silver halide emulsion layer sensitized with a sensitizing dye of Formula I: ##STR1## wherein each of X.sub.1 and X.sub.2 is an oxygen atom, a sulfur atom, or a selenium atom, with the proviso that one of X.sub.1 and X.sub.2 is an oxygen atom and the other is a sulfur or selenium atom; V.sub.1 and V.sub.2 together or V.sub.2 and V.sub.3 together represent the atoms necessary to complete a fused benzene ring; each of V.sub.4 and V.sub.5 is independently a hydrogen or halogen atom, or an alkyl, alkoxy or aryl group; R.sub.1 is an acid substituted alkyl group; R.sub.2 is a 2-sulfoethyl group; and M is a counterion as necessary to balance the charge.

Abstract: A black & white paper with variable gradation containing a silver chloride-bromide emulsion, which is divided into at least three portions, one of which is sensitised with a blue sensitiser and two further portions are sensitised both with differing quantities of blue sensitiser and with differing quantities of a green sensitiser, wherein the blue sensitiser is of the formula (I) and the green sensitiser is of the formula (II) ##STR1## in which R.sub.1 to R.sub.8, X.sup.(-) and m have the meaning stated in the specification, is distinguished by an extended gradation range.

Abstract: A color photographic light-sensitive material which has a high storage stability and a high sensitivity and in which photographic properties vary little with the passage of time from photography to development is provided. At least one light-sensitive silver halide emulsion layer constituting a silver halide color photographic light-sensitive material is spectrally sensitized with at least one type of a spectral sensitizing dye represented by Formula (I) below, and at least one silver halide emulsion contained in this light-sensitive silver halide emulsion layer is subjected to reduction sensitization in the manufacturing process of the emulsion. (In Formula (I), each of R.sub.11 and R.sub.12 represents an alkyl group, Z.sub.11 represents a group of atoms required to form a benzene ring, Z.sub.12 represents a group of atoms required to form a benzothiazole nucleus, a benzoselenazole nucleus, a benzoxazole nucleus, or a naphthoxazole nucleus, and X.sub.11 represents a charge-balancing counter anion.

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 color photographic material comprising:(a) a support,(b) at least three silver halide photosensitive emulsion layers on said support, where(i) each of said at least three photosensitive layers has spectral sensitivity peaks in three different light wavelength regions of not smaller than 650 nm, and(ii) said the photosensitive layer contains a cyan coupler, the other photosensitive layer contains a magenta coupler and the another photosensitive layer contains a yellow coupler, and(c) silver halide of said at least three photosensitive emulsion layers comprises silver chloride or silver chlorobromide containing at least 96 mol% silver chloride, where grains of silver halide of at least one of said three layers further contain from 0.01 to 3 mol% of silver iodide (based on the amount of silver halide in the emulsion) on the grain surface or sub-surface.

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: 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: Disclosed is a silver halide photographic light-sensitive material which is high in sensitivity for high-intensity red light source and less in fog formation and excellent in time stability and comprises a support and at least one silver halide emulsion layer provided on the support wherein said silver halide emulsion comprises 50 mol % or more of silver chloride and contains 5.times.10.sup.-9 mol or more of a water-soluble rhodium compound per 1 mol of silver and at least one sensitizing dye represented by the following formula (I), pH of said emulsion as finished being 4.8 or less: ##STR1## wherein the symbols are as defined in the specification.

Abstract: Methine compounds of formulas (I), (II) and (III) are disclosed: ##STR1## wherein R.sub.3, R.sub.5 and R.sub.5a each represents an alkyl group, an aryl group, or a heterocyclic group, and the remaining symbols are defined in the specification. A silver halide light-sensitive material containing at least one of the methine compounds is also disclosed.

Abstract: A photographic material including a hydrophilic colloid layer containing a dispersion of dye is disclosed. The dye colors a specific layer in the photographic material without diffusing to other layers during storage, yet is quickly decolored or eluted during development processing.

Abstract: Disclosed is a silver halide photographic material containing at least one dye of formula (Ia), (Ib), (Ic), or (Id): ##STR1## wherein R.sup.1, R.sup.2, R.sup.9 and R.sup.10 may be the same or different and each represents an alkyl group; Z.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 each represents a non-metallic atomic group necessary for forming a nitrogen-containing hetero ring; R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.11, R.sup.12, R.sup.13 and R.sup.14 may be the same or different and each represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group; R.sup.7, R.sup.8, R.sup.15 and R.sup.16 may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an amino group or a hydroxyl group; R.sup.3 and R.sup.4, R.sup.5 and R.sup.6, R.sup.11 and R.sup.12, R.sup.13 and R.sup.14, R.sup.3 and R.sup.7, R.sup.5 and R.sup.8, R.sup.11 and R.sup.15, or R.sup.13 and R.sup.

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.