Abstract: Disclosed are a silver halide photographic material containing at least one merocyanine color-sensitizing dye having a particular structure of formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group having a residue capable of making the compound soluble in water as a free acid or salt; V.sub.1, V.sub.2, V.sub.3 and V.sub.4 each represent a hydrogen atom or a monovalent substituent, provided that these substituents (V.sub.1, V.sub.2, V.sub.3, V.sub.4) are not bonded to each other to form a ring and that the sum of the molecular weights of V.sub.1, V.sub.2, V.sub.3 and V.sub.4 is from 4 to 50; L.sub.1, L.sub.2, L.sub.3 and L.sub.4 each represent an optionally substituted methine group; M.sub.1 represents a charge-neutralizing pair ion; and m.sub.1 represents a number of from 0 to 4 that is necessary for neutralizing the intramolecular charge.

Abstract: A direct positive type silver halide photographic material is described, which contains at least one compound represented by the following formula (I) and at least one cyanine dye having a pyrazolo[5,1-b]quinazolone nucleus and a cyanine heterocycle nucleus, wherein a carbon atom at 3-position of the pyrazolo[5,1-b]quinazolone nucleus is bonded through a four-methine chain to an atom at the 2-position or 4-position of the cyanine heterocycle nucleus, provided that the 4-position is possible only when the cyanine heterocycle nucleus is a quinoline or pyridine nucleus: ##STR1## 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, which may be substituted; V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, V.sub.7 and V.sub.8 each represents a hydrogen atom or a monovalent substituent; L.sub.1, L.sub.2 and L.sub.3 each represents a substituted or unsubstituted methine group; M.sub.1 represents a charge-neutralizing counter ion; and m.sub.

Abstract: A silver halide photographic material comprising a support having thereon a silver halide emulsion layer which comprises a hydrazine compound having at least one absorbent group to silver halide, wherein two nitrogen atoms of the hydrazine compound are substituted by four substituents and the carbon atoms in the four substituents bonded directly to the two nitrogen atoms are not substituted by an oxo group.

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: Methine compounds are described, which can be represented by general formula [Ic]: ##STR1##

Abstract: A silver halide photographic photosensitive material comprises a silver halide photographic emulsion layer and a compound represented by general formula (I): ##STR1## wherein V.sub.1 and V.sub.2 each represents a hydrogen atom, an alkyl group or an alkoxy group; at least one of V.sub.1 and V.sub.2 is an alkyl group or an alkoxy group; Z.sub.1 represents a group of atoms which is required to form a five- or six-membered nitrogen-containing heterocyclic ring; Z.sub.2 represents a group of atoms which is required to form a five- or six-membered nitrogen-containing heterocyclic ring; Z.sub.3 represents an oxygen atom, a sulfur atom or a selenium atom; R.sub.1 and R.sub.3 each represents an alkyl group; R.sub.2 represents an alkyl group, an aryl group or a heterocyclic group; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; M.sub.1 represents a charge neutralizing counter-ion; and m.sub.1 is a number having a value zero or above which is required to neutralize the charge within 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: There is disclosed a dye fixing element containing a novel compound which improves the light fastness of an image obtained by the method in which the image is formed by transferring. The above dye fixing element contains a novel hydrazine derivative represented by the following Formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent independently a substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, or aralkyl group; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be combined with each other to form a ring, provided that this ring is a non-aromatic heterocyclic ring and the atoms constituting the ring other than the nitrogens of Formula (I) are carbon atoms.

Abstract: The present invention provides a high sensitivity silver halide photographic material which minimizes the formation of fog and exhibits a small sensitivity drop during storage. A silver halide photographic material is provided comprising a compound having a methine dye and a styryl base covalently connected to each other.

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: 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: Disclosed is a silver halide color photographic light-sensitive material which includes, on a support, 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, and at least one red-sensitive silver halide emulsion layer containing a cyan coupler, and in which a weight-averaged wavelength (.lambda..sub.-R) of a spectral sensitivity distribution of magnitude of an interimage effect which the silver halide emulsion layers except for all of the red-sensitive silver halide emulsion layers have on the red-sensitive layers over a range of 500 to 600 nm is 500 nm<.lambda..sub.-R <560 nm, and a difference between weight-averaged wavelength (.lambda..sub.G) of a spectral sensitivity distribution of at least one green-sensitive silver halide emulsion layer and .lambda..sub.-R is .lambda..sub.G -.lambda..sub.-R .ltoreq.

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 color light-sensitive material comprising at least three light-sensitive layers having different color-sensitivity from one another provided on a support. Each layer comprises a combination of at least a light-sensitive silver halide, a binder and a dye-providing compound. At least one layer thereof has a spectral sensitization peak in at least two wavelength regions, the peaks in the at least two wavelength regions being at least 50 nm away from each other and at least one spectral sensitization peak thereof exists in the wavelength region of 700 nm or above.

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 silver halide photographic material contains at least one hydrazine compound of formula (I): ##STR1## where 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; and R.sub.1 and R.sub.2, R.sub.3 and R.sub.4, R.sub.1 and R.sub.3, and R.sub.2 and R.sub.4 each may be bonded to each other to form a non-aromatic ring; provided that the carbon atom of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which is directly bonded to a nitrogen atom of the hydrazine core of the compound is not substituted by an oxo group. The material has a high sensitivity and does not tend to fog. After storage, depression of the sensitivity of the material is small.

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.