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 novel class of non-sensitizing infra-red dyes derived from heptamethine dyes with indolenine nuclei is disclosed. They are useful as filter-, acutance- or antihalation dyes for photographic elements based on silver halide or for photothermographic elements.

Abstract: A novel silver halide photographic material is provided, comprising a hydrophilic colloidal layer containing at least one dye represented by the following formula (i): ##STR1## wherein Y.sup.1 and Y.sup.2 each represents a chalcogen atom, --CH.dbd.CH--, --N(R.sup.10)--, or --C(R.sup.10)(R.sup.11)--, in which R.sup.10 and R.sup.11 each represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group necessary for forming a benzo condensed or naphtho condensed ring; R.sup.1 and R.sup.2 each represents an alkyl group; the plurality of L groups may be the same or different and each represents a methine group, with the proviso that at least one of the plurality of L groups represents a methine group substituted by --OR.sup.12, --N(R.sup.12)(R.sup.13), --SR.sup.12 or --CH(R.sup.14)(R.sup.15), in which R.sup.12 represents an alkyl or aryl group substituted by an acidic substituent, R.sup.13 represents a hydrogen atom or an alkyl or aryl group substituted by an acidic substituent, and R.sup.

Abstract: A silver halide photographic material is provided which exhibits nearly equal sensitivities and gamma values with respect to yellow, magenta and cyan to form a black-and-white image of neutral black or sepia tone, even when it is processed with a color developer free from benzyl alcohol.The silver halide photographic material is made up of a substrate and at least one silver halide emulsion layer formed on the substrate. The silver chloride content of silver halide grains constituting the silver halide emulsion layer is 95 mole % or above, the silver halide emulsion is spectrally sensitized by a specific sensitizing dye, and the silver halide emulsion layer contains a yellow coupler, a magenta coupler and a cyan coupler. The image-forming process is characterized by developing the silver halide photographic material with a color developer substantially free from benzyl alcohol.

Abstract: A silver halide photographic material comprises a support, at least one silver halide emulsion layer and at least one non-light-sensitive hydrophilic colloidal layer. The silver halide emulsion layer or the hydrophilic colloidal layer contains a colorant having the absorption maximum wavelength within the infrared region of 700 to 1,100 nm. The colorant is in the form of solid particles dispersed in the silver halide emulsion layer or in the hydrophilic colloidal layer. The solid particles cannot substantially be removed by a processing solution of the silver halide photographic material. An image forming process employing the silver halide photographic material is also disclosed.

Abstract: A method for forming an image, which comprises a step of subjecting a light-sensitive material to exposure to laser light having a multi-longitudinal-mode, wherein the light-sensitive material comprises a support having provided thereon at least one layer containing light-sensitive silver halide grains having an average grain size of no greater than 0.2 .mu.m, and the light-sensitive silver halide grains have a coverage rate of no greater than 1 g/m.sup.2, based on silver.

Abstract: A dye of the formula (I) below, and photographic elements having a light sensitive layer and which element contains such a dye: ##STR1## X.sub.1 and X.sub.2 each independently represent the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus;x and y are, independently, integers from 0 to 3 provided x+y is no greater than 4;p and q each independently represents 0 or 1,each L independently represents a methine group;R.sub.1 and R.sub.2 each independently represents an alkyl group or an aryl group, andR.sub.3 represents an alkyl group, aryl group or heteroaryl group;W1 is a counterion as needed to balance the charge of the molecule.

Abstract: A silver halide photographic material having good spectral-sensitivity to laser rays, and which forms a high-sensitivity and high-contrast image by short-time exposure with high-intensity light. When processed with a reduced amount of replenisher, there is little fluctuation of photographic properties of the processed photographic material. The present invention relates to a silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a silver halide emulsion containing silver halide grains having a silver chloride content of 50 mol % or less, wherein the silver halide emulsion is spectrally sensitized with a spectral sensitizing dye selected from the group consisting of compounds represented by formulae (I), (II) and (III) and the silver halide emulsion is chemically sensitized with a selenium compound and a gold compound: ##STR1## where the substituent groups for formulae (I) to (III) are defined in the specification.

Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the silver halide emulsion layer contains a silver halide emulsion sensitized by a methine dye represented by following formula (I) and the total content of calcium in the photographic constituting layers on the support is not more than 10 mg/m.sup.2 ; ##STR1## wherein Q represents a non-metallic atomic group necessary for forming a 5-membered or 6-membered ring; R.sub.1 to R.sub.11 each represents a hydrogen atom or a substituent, however, at least one of R.sub.1 to R.sub.3 represents a group containing an aromatic group and R.sub.4 and R.sub.5 are not a hydrogen atom; L.sub.1 to L.sub.

Abstract: There is disclosed a silver halide photographic material in which a residual color can be compatible with a sensitivity in a development processing. The photographic material comprises a support and provided thereon at least one silver halide emulsion layer containing at least one of the methine compounds represented by the following Formula (I) and at least one of the compounds represent-ed by the following Formula (II): ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sup.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5, or --(CR.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6, in which R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent an alkyl group, an alkoxy group, or an amino group and r, s, t and u each repre-sent an integer of 1 to 5; R.sup.2 is synonymous with R.sup.1 or represents an alkyl group which is different from R.sup.1 ; Z.sup.1 and Z.sup.

Abstract: A supersensitizing dye combination for silver halide photographic materials is disclosed. The combination is of a first dye according to the formula: ##STR1## Z.sub.1 and Z.sub.2 each independently represents the atoms necessary to complete a substituted or unsubstituted heterocyclic nucleus,each L independently represents a substituted or unsubstituted methine group,n is a positive integer of from 1 to 4,p and q each independently represents 0 or 1,X represents a cation as needed to balance the charge of the molecule,A and A' each independently represents a divalent linking group such that at least one of H--A--SO.sub.3 H and H--A'--SO.sub.3 H would each have a log P value that is more negative than -0.3, anda second dye, having an oxidation potential that is at least about 0.08 volts less positive than the oxidation potential of the first dye and a reduction potential that is equal to or more negative than the reduction potential of the first dye, according to the formula: ##STR2## Z.sub.3 and Z.sub.

Abstract: An element for cleaning processing solutions contained in a radiographic film processor is disclosed. The element is comprised of a transparent film support and hydrophilic colloid layers coated on opposite sides of the film support. An infrared opacifying dye is contained within the element capable of reducing specular transmission through the element before, during and after processing to less than 50 percent, measured at a wavelength within the spectral region of from 850 to 1100 nm. A processing solution soluble colorant can be contained in one or more of the hydrophilic colloid layers.

Abstract: A silver halide photographic material is described, which contains the methine compound represented by the following formula (I): ##STR1## wherein Z.sup.1 represents a nonmetal atomic group necessary for completing a 5- or 6-membered heterocyclic ring which may be condensed; R.sup.1 represents an aliphatic or aromatic group which may be substituted; G.sup.1 represents a hydroxyl group, an amino group, an aliphatic or aromatic primary amino group, a hydroxyamino group, an alkoxyamino group, an acylamino group, or an aliphatic or aromatic sulfonamido group; G.sup.2 is a group substituted at the position adjacent to G and is a group represented by T.sup.2 --C(.dbd.T.sup.1)--; .dbd.T.sup.1 represents .dbd.O, .dbd.NH, .dbd.NOH, an alkoxyimino group, an aliphatic or aromatic imino group, an acylimino group, or an aliphatic or aromatic sulfonylimino group; T.sup.

Abstract: A silver halide photographic element comprising a silver halide emulsion layer sensitized with a sensitizing dye of formula (I) which provides a maximum sensitivity at greater than 700 nm and which emulsion layer has substantially no dye deaggregating compound therein: ##STR1## wherein: X.sub.1 and X.sub.2 are independently sulfur, selenium or oxygen provided that X.sub.1 and X.sub.2 are not both oxygen and either benzo ring may be substituted or unsubstituted;R.sub.1 and R.sub.2 each independently represent an alkyl, aryl or heterocyclic group provided that at least one of R.sub.1 or R.sub.2 has an acid or acid salt substituent;A is a counterion as needed to balance the charge.

Abstract: An apparatus for exposing photosensitive materials includes a plurality of light sources for generating beams having different wavelengths, a polygon mirror for scanning and exposing the beams toward a color photosensitive material, and one or more f.theta. lenses disposed on an optical path between the photosensitive material and the polygon mirror. The polygon mirror and the f.theta. lenses are arranged, with respect to the beam from a light source having an intermediate wavelength among the light sources, such that reflection points corresponding to both ends of beam scanning on reflection surfaces of the polygon mirror pass through an identical point on an optical axis of the f.theta. lenses, and light beams at the both ends of beam scanning have line symmetry with respect to the optical axis of the f.theta. lenses.

Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one silver halide photographic emulsion layer, wherein the silver halide emulsion layer has been spectral-sensitized with a spectral-sensitizer to have a sensitized peak in a wavelength range longer than 730 nm; and light absorption due to the silver halide emulsion containing the spectral sensitizer satisfies the following equation (1):Abs (peak wavelength)/Abs (peak wavelength-100 nm)>5 (1);and a method for processing the above silver halide photographic material.The material has high sensitivity only to semiconductor laser rays and has low sensitivity to any other rays.

Abstract: A silver halide photographic material comprising at least one silver halide emulsion layer and at least one non-light-sensitive hydrophilic colloidal layer provided on a support. The silver halide emulsion layer or the hydrophilic colloidal layer contains a dye represented by the formula (I): ##STR1## in which A.sup.1 is an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; each of Q.sup.1 and Q.sup.2 is hydrogen, an alkyl group or a substituted alkyl group, or Q.sup.1 and Q.sup.2 are combined with each other to form a five or six-membered heterocyclic ring; Q.sup.3 is hydrogen, a halogen atom, carboxyl, hydroxyl, methyl or methoxy; each of M.sup.1 and M.sup.2 is hydrogen, a metal atom or an atomic group that forms a monovalent cation; and p is 2, 3 or 4.

Abstract: A silver halide photographic light-sensitive material. It comprises a support and at least one silver halide emulsion layer thereon, wherein at least one silver halide emulsion layer comprises silver chlorobromide emulsion particles containing 95 mol % or more of silver chloride or silver chloride emulsion particles as well as at least one thiosulfonic compound of formula (X) and at least one sulfinic compound of formula (Y), and the particles contained in the silver halide emulsion layer are sensitized by gold, selenium, or tellurium, and are spectrally sensitized by a red-sensitive methine dye represented by formula (I): ##STR1## wherein Q, R.sup.1 and other symbols each independently represents a specific atom or group, n is an integer from 0 to 6, M is a counter ion which neutralizes an electric charge, and m is 0 or 1.

Abstract: The present invention provides heat-developable, photothermographic elements comprising a support bearing at least one photosensitive, image-forming layer comprising:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible silver source;(c) a reducing agent for silver ions;(d) a binder; and(e) a spectrally sensitizing amount of a compound having the central nucleus: ##STR1## wherein: Z is S, O, Se or N--R.sup.3 ;R.sup.1 and R.sup.2 represent an alkyl group of from 1 to 20 carbon atoms other than carboxy-substituted alkyl, preferably an alkyl group of from 1 to 8 carbon atoms, and most preferably an ethyl group; andR.sup.3 is H or alkyl group;X and Y are thioalkyl groups of from 1 to 20 carbon atoms;n=0 to 4;m=0 to 4; the sum of n plus m equals at least 1;D.sup.1 to D.sup.7 each independently represents a methine group and adjacent methine groups selected from D.sup.2, D.sup.3, D.sup.4, D.sup.5 and D.sup.6 may form cyclic groups;p=0 or 1; andA.sup.- is an anion.

Abstract: The improved silver halide photographic material has one or more silver halide emulsion layers on a support and at least one of said emulsion layers contains silver halide grains which are of normal crystal form having at least one concave crystal face. This photographic material has not only high sensitivity but also good keeping quality.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the layer contains at least one compound represented by the following formula (I) and at least one compound represented by the following formula (X): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and each represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R.sub.4 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; and R.sub.1 and R.sub.2, and R.sub.3 and R.sub.4 each may be combined with each other to form a ring; ##STR2## wherein Z.sub.11 represents a sulfur atom, a selenium atom or a substituted nitrogen atom represented by ##STR3## in which R.sub.

Abstract: A photographic materials with a high silver chloride red sensitive layer which has a high sensitivity and exhibits reduced thermal sensitivity. In particular the material has a silver halide emulsion of at least 90% silver chloride and compounds of formula I and II below: ##STR1## Where A, Z, X1, X2, R1, R2, W1-W12, D, G1, G2, Y1, Y2 are as defined in the specification.

Abstract: A novel silver halide photographic material is disclosed, which comprises at least one methine dye represented by the following formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an atomic group required for the formation of a 5- or 6-membered nitrogen-containing heterocyclic nucleus; R.sub.1 represents an alkyl, aryl or heterocyclic group; R.sub.2 and R.sub.3 each represents an alkyl group, with the proviso that at least one of R.sub.2 and R.sub.3 represents an alkyl group substituted by an alkoxy or aryloxy group; L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, and L.sub.7 each represents a methine group which may be substituted or unsubstituted; n.sub.1 and n.sub.2 each represents an integer 0 or 1; M represents a charge neutralizing ion; and m represents 0 or a higher number required for the neutralization of electric charge in the dye.

Abstract: A silver halide photographic light-sensitive material is disclosed, which comprises a support and provided thereon, a silver halide emulsion layer containing a crown ether having a 18-membered ring condensed with at least one aromatic ring and silver halide grains having a (100) face and satisfying the following inequality:15.ltoreq.Kwherein K is defined to be (intensity of a diffraction line attributed to a (200) face)/(intensity of a diffraction line attributed to a (222) face).

Abstract: A photographic silver halide photosensitive material includes an infrared sensitive layer which is spectrally sensitized with a combination of at least two J-band type sensitizing dyes so as to have maximum spectral sensitivity at 700 nm or longer wavelength. The photosensitive material has high sensitivity to exposure to a semiconductor laser of 700 nm or longer wavelength. Color separation is improved in the case of color photosensitive material.

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 silver halide photographic element comprising a sensitizing dye of the formula: ##STR1## wherein: X1, X2, n, L, L2, R1 and R2 are as defined in the specification;Z1 represents Ar1-(L1) m, where Ar1 is a substituted or unsubstituted aromatic group, L1 is a linking group, m is 0 or 1, and the LOGP(A) of a molecule having a structure A corresponding to a portion of the dye ##STR2## is no more than 90% of LOGP(A'), where A' is the same as A except Z1 is replaced with unsubstituted phenyl, provided that L1 is not --CO-- when X1 or X2 is S or Se; andW1 is a counterion as needed to balance the charge of the molecule.

Abstract: Disclosed is a silver halide emulsion having at least one methine compound of formula (I) (MET).sub.k1 --[(Q) --Ar].sub.k2, wherein MET represents an atomic group having a methine compound structure; Q represents a divalent linking group composed of atom(s) or atomic group(s) containing at least one carbon, nitrogen, sulfur or oxygen atom; Ar represents an aromatic group containing monocyclic compound(s) each composed of 5 or more atoms; k1 represents an integer of 1 or more; and k2 represents an integer of 2 or more. A photographic material containing the emulsion has high sensitivity and high storage stability.

Abstract: A silver halide photographic material which contains methine dyes represented by formula (I) to obtain high sensitivity and excellent storage stability: ##STR1## wherein Z.sub.1 and Z.sub.2 each represents atoms necessary to complete a 5- or 6-membered nitrogen-containing hetero ring; Q represents atoms necessary to complete a 5- or 6-membered ring; R.sub.1 represents an alkyl group, an aryl group or a heterocyclyl group; R.sub.2 and R.sub.3 each represents an alkyl group; L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5 and L.sub.6 each represents a methine group; n.sub.1 and n.sub.2 each represents 0 or 1; M represents an ion for neutralizing electric charges; and m is a number necessary for neutralization of electric charges in the dye molecule, including 0.

Abstract: A heat developing photosensitive member including: a photosensitive layer containing at least an organic silver salt, a reducing agent and a photosensitive silver halide or a photosensitive silver halide forming agent; and a supporting member for supporting the photosensitive layer thereon, wherein merocyanine dye having a structure in which a thiazole nucleus or selenazole nucleus and hydantoin nucleus, thiohydantoin nucleus or selenohydantoin nucleus are combined with each other by a combining group having a methine group is contained in the photosensitive layer.

Abstract: A photographic element having a silver halide emulsion sensitized by dye of the formula I: ##STR1## wherein: R.sup.1 represents a substituted or unsubstituted aromatic or heteroaromatic group, a substituted or unsubstituted alkyl or H;R.sup.2 represents a substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, or H;E.sup.1 represents an electron withdrawing group;Z represents the non-metallic atoms required to complete a substituted or unsubstituted ring system containing at least one 5- or 6-membered heterocyclic nucleus;L.sup.1, L.sup.2, L.sup.5 and L.sup.6 independently represent a substituted or unsubstituted methine;m may be 0, 1, 2 or 3;n may be 0 or 1.

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: A silver halide photographic material is disclosed which contains at least one methine dye represented by the following formula (I) or (II): ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an atomic group for forming a five-membered or six-membered nitrogen-containing heterocyclic ring; R.sub.1, R.sub.2, R.sub.4 and R.sub.5 each represents an alkyl group; R.sub.3 and R.sub.6 each represents an alkyl group, an aryl group or a heterocyclic group; V.sub.1 to V.sub.12 each represents a hydrogen atom or a substituent; L.sub.1 to L.sub.10 each represents a methine group; M.sub.1 and M.sub.2 each represents an ion for neutralizing charge; m.sub.1 and m.sub.2 each represents a number of 0 or more which is required for neutralizing charge; and n.sub.1 and n.sub.2 each represents 0 or 1.

Abstract: Hydrophobic compounds, such as photographically useful compounds, are incorporated into an aqueous medium, such as a silver halide emulsion or a photographic coating composition, by forming a solid additive material comprising the hydrophobic compound and a solid hydrophilic material. The solid hydrophilic material is preferably a mixture of a polysaccharide and sorbitol or succinimide. The additive material is prepared by dry powder mixing the solid hydrophobic compound and solid hydrophilic material followed by a process step that heats, expells, and cools the composition to produce a high surface area uniform material having a specific surface area of at least about 10 square centimeters per gram. The additive material can then be dissolved directly and uniformly in the aqueous medium.

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 silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein at least one layer contains at least one metallocene compound.

Abstract: The present invention provides a photographic material comprising a silver halide emulsion layer sensitized to light above 700 nm by means of an infrared sensitizing dye having a maximum absorption between 700 nm and 850 nm characterized in that said silver halide emulsion further comprises a red sensitizing dye of the cationic type having a maximum absorption between 600 nm and 700 nm. The thus obtained photographic material shows an increased sensitivity in the infrared region. The material can be used in as silver salt diffusion transfer process to prepare a lithographic printing plate.

Abstract: A novel silver halide photographic material is provided, comprising a hydrophilic colloidal layer containing at least one dye represented by the following formula (I): ##STR1## wherein Y.sup.1 and Y.sup.2 each represents a chalcogen atom, --CH.dbd.CH--, --N(R.sup.10)--, or --C (R.sup.10)(R.sup.11)--, in which R.sup.10 and R.sup.11 each represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group necessary for forming a benzo condensed or naphtho condensed ring; R.sup.1 and R.sup.2 each represents an alkyl group; the plurality of L groups may be the same or different and each represents a methine group, with the proviso that at least one of the plurality of L groups represents a methine group substituted by --OR.sup.12, --N(R.sup.12)(R.sup.13), --SR.sup.12 or --CH(R.sup.14)(R.sup.15), in which R.sup.12 represents an alkyl or aryl group substituted by an acidic substituent, R.sup.13 represents a hydrogen atom or an alkyl or aryl group substituted by an acidic substituent, and R.sup.

Abstract: A silver halide photographic material comprising on a support at least one silver halide emulsion layer having a silver halide content of not lower than 90 mol %, wherein a silver halide emulsion in at least one of said silver halide emulsion layers having a silver chloride content of not lower than 90 mol % contains at least one compound represented by formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an atomic group required for forming a nitrogen-containing five-membered or six-membered heterocyclic ring; Q.sub.1 and Q.sub.2 each represents a methylene group; R.sub.1 and R.sub.2 each represents an alkyl group; R.sub.3 represents an alkyl group, an aryl group or a heterocyclic group; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 each represents a methine group; n.sub.1 and n.sub.2 each represents 0 or 1; M.sub.1 represents a counter ion for neutralizing electric charge; and m.sub.1 represents a number not less than 0 required for neutralizing electric charge in the molecule.

Abstract: Photothermographic elements of the photothermographic type may be sensitized to the infrared with sensitizing dyes of the formula: ##STR1## wherein: R.sup.1 represents a (CH.sub.2).sub.n --COO.sup.- group of from 1-20 carbon atoms, or an alkyl group of from 1 to 20 carbon atoms; andn is an integer from 1 to 20.

Abstract: Silver halide photographic element comprising a support and at least one silver halide emulsion layer, characterised in that said silver halide emulsion layer is spectrally sensitized to infrared radiation with a tricarbocyanine dye having the formula: ##STR1## wherein, Z.sub.1 and Z.sub.2 each independently represents the atoms necessary to complete a thiazole nucleus or an oxazole nucleus,Z.sub.3 represents the atoms necessary to complete a 5-membered N-containing aromatic ring, Q represents the atoms necessary to complete a 5- or 6-membered carbocyclic ring, R.sub.1 and R.sub.2 each independently represents an alkyl group, X.sup.- represents an anion, and n represents an integer of 1 to 2, provided that n is 1 when the dye forms an intramolecular salt.

Abstract: A silver halide photographic material is disclosed which comprises at least one of methine compounds represented by the following formula (I) ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl group; V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6 and V.sub.7 are the same or different and each represents a hydrogen atom or a substituent; X.sub.1 represents a halogen atom; L.sub.1, L.sub.2 and L.sub.3 are the same or different and each represents a substituted or unsubstituted methine group; E represents an auxochrome; n represents a number of 0 or more; M.sub.1 represents an ion for neutralizing charge; and m.sub.1 represents a number of 0 or more necessary for neutralizing the molecular charge.

Abstract: In a method of manufacturing a light-sensitive silver halide emulsion with an average grain size of 0.04 to 0.2 .mu.m, a sensitizing dye is added at a temperature of 25.degree. C. to 50.degree. C., and subsequently chemical ripening is performed at a temperature higher than the addition temperature of the sensitizing dye.

Abstract: A silver halide emulsion containing at least one member of methine dyes represented by the following general formula (I): ##STR1## wherein MET represents an atomic group having a methine dye structure; Q represents a bivalent bonding group comprising at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom or an atomic group having at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom; Ar represents a group which has an aromatic character and derives from a polycyclic compound composed of 8 or more atoms excluding nitrogen atom; l.sub.1 represents 1 or 2; l.sub.2 represents 0 or 1; and l.sub.3 represents 1, 2, 3 or 4.

Abstract: A heat-developable color light-sensitive material comprising a support having thereon at least three silver halide emulsion layers each sensitive to a different spectral wavelength region, one silver halide emulsion layer or a light-insensitive layer adjacent thereto containing a yellow dye-providing compound, a second silver halide emulsion layer or a light-insensitive layer adjacent thereto containing a magenta dye-providing compound and a third silver halide emulsion layer or a light-insensitive layer adjacent thereto containing a cyan dye-providing compound; at least one of said silver halide emulsion layers having a maximum spectral sensitivity at a wavelength of at least 700 nm and a spectral sensitivity at a wavelength 20 nm longer than said maximum spectral sensitivity wavelength of at most 1/10 of said maximum spectral sensitivity.

Abstract: A methine compound having a benzoxazole nucleus substituted by a meta-substituted aryl group and the methine compound represented by the following formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represents a substituted or unsubstituted alkyl group; Z.sub.1 represents an atomic group necessary for forming a five-membered or six-membered nitrogen-containing heterocyclic ring; R.sub.3 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a halogen atom, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted heterocyclic group; L.sub.1, L.sub.2 and L.sub.3 are the same or different and each represents a substituted or unsubstituted methine group; n represents 0, 1, 2 or 3; M.sub.1 represents an ion for neutralizing charge; and m.sub.1 represents a number of 0 or more necessary for neutralizing the molecular charge.

Abstract: A novel silver halide photographic material comprising at least one methine compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sup.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5 or --(CH.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6 in which R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents an alkyl group, alkoxy group or amino group, r, s, t and u each represents an integer 1 to 5; and R.sup.2 represents has the same meaning as R.sup.1 or represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group required to form a 5- or 6-membered heterocyclic group; p and q each represents an integer 0 or 1; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; m represents an integer 0 to 2; X represents an anion; and k represents an integer required to adjust the charge in the molecule to 0.

Abstract: Spectral sensitizing dyes, and silver halide photographic elements incorporating them, which dyes have the formula: ##STR1## wherein: X1 and X2 each independently represent the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus (preferably benzo-condensed), and X1 may be further substituted and X2 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 substituted or unsubstituted pyrrole or furan containing group;W1 is a counterion as needed to balance the charge of the molecule.

Abstract: A silver halide photographic light-sensitive material comprises a support and provided thereon, a silver halide emulsion layer containing silver halide grains and a macrocyclic compound in an amount of 1.times.10.sup.-6 to 1.times.10.sup.-1 mol per mol of silver, said macrocyclic compound comprising a 9- or more-membered ring containing at least one of a nitrogen atom, an oxygen atom, a sulfur atom and a selenium atom, and said silver halide grains having a silver chloride content of not less than 90 mol % and containing at least one metal selected from the group consisting of metals of VIB group, VIIB group, VIII group, IIB group, IIIA group and IVA group from the Periodic Table.