Abstract: Disclosed is a silver halide photographic emulsion spectrally sensitized in the wavelength range longer than 730 nm, and full-color recording materials containing such a photographic emulsion. The photographic emulsion has undergone J-band sensitization by containing at least one compound represented by the following general formula (I) in an amount of from 0.3 to 0.9 based on the specific addition amount defined in the disclosure, at a temperature ranging from 60.degree. C. to 85.degree. C. to gain a spectral sensitivity maximum at a wavelength from 730 nm to 900 nm: ##STR1## wherein Z.sub.1 and Z.sub.2 each represents a sulfur or selenium atom; 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 heterocyclyl group; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; A.sub.1 and A.sub.2 each represents the atoms necessary for completing a benzene ring; R.sub.1 and R.sub.2 may combine with L.

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: 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: A silver halide photographic material is disclosed, comprising at least one sensitizing dye represented by formula (I): ##STR1## wherein V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5 and V.sub.6 each represents a substituent with the total of the Hammett's constants of all the substituents being less than -0.27, R.sub.1 and R.sub.2 each represents an alkyl 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, m represents 0 or 1, Z represents an atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing hetero ring, X.sub.n represents a charge balancing counter ion(s), n has a value of at least 0 which is necessary for neutralizing the charge of the compound. The material has a high sensitivity to infrared rays and gives an image of high quality with little remaining color. Also disclosed is a method for processing such a silver halide photographic material.

Abstract: A silver halide photographic material having provided on a support, at least one red sensitive emulsion layer comprising a silver halide emulsion having a silver chloride content of from 90 to 100 mol % and spectrally sensitized by a red sensitizing dye having a reduction potential at a value of -1.27 (V vs SCE) or more negative and a nitrogen-containing heterocyclic compound, exhibits reduced fluctuation in photographic sensitivity depending on the change in the printing temperature and reduced fluctuation in photographic sensitivity due to long term storage under the normal condition.

Abstract: There is disclosed a silver halide photographic light-sensitive material which has a high sensitivity and is less susceptible to an increase in fog and fluctuation of sensitivity during storage at a high temperature and/or a high humidity. The light-sensitive material contains at least one methine compound represented by Formula (I): ##STR1## wherein R.sub.1 represents an alkyl group; R.sub.2 represents an alkyl group, an aryl group or a heterocyclic group; L.sub.1, L.sub.2, L.sub.3 and L.sub.4 each represents a methine group; Z.sub.1 represents a group of atoms necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; n.sub.1 represents 0 or 1; n.sub.2 represents 0 or an integer of 1 to 4; n.sub.3 represents an integer of 1 to 10; D represents a group of atoms necessary to form an acidic nucleus; M.sub.1 represents a charge-neutralizing ion; and m.sub.1 represents a number of 0 or more which is necessary to neutralize a charge contained in the compound.

Abstract: Disclosed is a silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): ##STR1## wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; l.sub.1 represents an integer 1 or 2; l.sub.2 represents an integer 0 or 1, l.sub.3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce ##STR2## A silver halide photographic material is also disclosed which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions and having a localized phase with a high iron ion concentration and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.

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

Abstract: 'Disclosed is a compound represented by the following general formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an oxygen atom, a sulfur atom or a selenium atom; R.sub.1 represents an alkyl group, an aryl group or a heterocyclic group; Q.sub.1 and Q.sub.2 each represents a methylene group; Q.sub.3 and Q.sub.4 each represents an atomic group required to form a five-membered, six-membered or seven-membered ring; L.sub.1 represents a methine group; A.sub.1 and A.sub.2 each represents an atomic group required to form a benzene ring; M.sub.1 represents a counter ion for neutralizing the electric charge of the compound; and m.sub.1 represents the number required for neutralizing that electric charge.There is also disclosed a silver halide photographic material containing at least one compound of general formula (I).

Abstract: Silver halide photographic materials containing methine compounds of general formulas Ia, Ib, Ic, IIa, and IIb are disclosed. The variables are as defined in the present specification.

Abstract: A full color recording material comprising a support having thereon at least three silver halide photosensitive emulsion layers which contain respectively couplers which form yellow, magenta and cyan colorations and which are sensitive to light of different wavelength regions, at least two of the said layers being spectrally sensitized selectively to match laser light beams of wavelengths of at least 670 nm, wherein the at least two layers aforementioned contain at least one type of crosslinking type spectrally sensitizing dye.

Abstract: Methine dye which contains a cycloheptimidazole nucleus having a substituent at its 1-position thereof and in which the 7-membered ring moiety is substituted by a methine bond having an auxochrome, at the terminal thereof, for forming a conjugated resonance chromophoric group with the 10 .pi. electron series of the nucleus, showing a long absorption with one or a few methine bonds and have high light-stability and solution-stability.

Abstract: A silver halide color photographic material is described, comprising a support having provided thereon at least one silver halide emulsion layer, wherein said at least one silver halide emulsion layer comprises at least one compound represented by the formula (I) and at least one compound represented by the formula (II): ##STR1## wherein V.sub.1, V.sub.2, V.sub.3 and V.sub.4 each represents a hydrogen atom, a halogen atom, an alkyl group, an acyl group, an acyloxy group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group, a carboxy group, a cyano group, a hydroxy group, an amino group, an acylamino group, an alkoxy group or an aryl group, or V.sub.1 and V.sub.2, or V.sub.3 and V.sub.4 may be bound to each other to form a benzene ring;R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl group and may optionally form a salt with a metal atom or other organic compound;X.sup..crclbar.

Abstract: A silver halide photosensitive material is described which comprises at least one layer of a silver halide emulsion layer provided on a base, wherein said at least one silver halide emulsion layer comprises at least one novel dye compound represented by general formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2 are independently represents a sulfur atom or a selenium atom;R.sub.1 and R.sub.2 each independently represents an alkyl group, provided that at least one of R.sub.1 or R.sub.2 must represent a butyl group, a pentyl group, a hexyl group, a heptyl group or an octyl group;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: Photopolymerizable initiator compositions having high photosensitivity to light sources giving visible rays and the other rays in the longer wavelengths. The compositions containing polymerizable compounds having ethylenic unsaturated bonds and salts formed by an organic boron compound anion and an organic cationic azulene dye compound comprising an azulene ring having a nitrogen atom or a chalcogen atom in the 2- or 4- position can be used for making lithographic printing plates, resinous relief printing plates, and resists or photomasks for printed circuit substrates.The polymerizable compounds having ethylenic unsaturated bonds can be encapsulated to obtain microcapsules to be used for the formation of black-and-white or color images.

Abstract: The present invention relates to an optical information recording medium for carrying out recording, reproduction and erasing with laser beams which comprises a support having carried thereon at least one methine dye which consists of an azulene nucleus, at least one of 10 carbon atoms of which is replaced by chalcogen atom(s) and/or nitrogen atom(s), and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with a 10 .pi. electron system of the nucleus.Optical information recording media of the invention have adequate recording characteristics having high C/N, and have high stabilities against long-term preservation or against long-time reading.

Abstract: A new optical recording medium is herein disclosed, the recording medium comprising a substrate and an optical recording layer formed thereon comprising a dye represented by the following general formula (I): ##STR1## (wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 respectively represent a hydrogen atom, a halogen atom or a monovalent organic group; A denotes a bivalent organic group which is bonded to the ring through a double bond; and X.crclbar. represents an anionic group and is present in a number required to neutralize existing cationic charges, provided that X.crclbar. may form an intramolecular salt together with either of R.sub.1 to R.sub.6 and A or that at least one of the following combinations, R.sub.2 and R.sub.3 ; R.sub.3 and R.sub.4 ; R.sub.4 and R.sub.5 ; R.sub.5 and R.sub.6 may form a substituted or unsubstituted aromatic carbocyclic ring or aromatic heterocyclic ring); and optionally a quencher.

Abstract: A photoconductive composition containing at least one of azaazulenium salt compounds represented by the following formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represents a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a carboxyl group, a sulfonic acid group, a mercapto group or a monovalent organic residue; A represents a divalent organic group bonded by the double bond; X.sup..crclbar. represents an anionic group; n is the number of X.sup..crclbar. groups required to balance the positive charge; provided that each X.sup..crclbar. group may be bonded to any of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 or A to form an inner salt; and any two of R.sub.2, R.sup.3, R.sub.4, R.sub.5 and R.sub.6 bonded to adjacent carbon atoms may be linked to form a substituted or unsubstituted aromatic carbocyclic or aromatic heterocyclic ring.

Abstract: A silver halide photographic light-sensitive material containing at least one methine dye which consists of an azulene nucleus, at least one of 10 carbon atoms of which is replaced by chalcogen atom(s) or nitrogen atom(s), and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with 10.pi. electron system of the nucleus is provided.Silver halide photographic light-sensitive materials of the invention are spectrally sensitized in long wavelength region, and have improved photographic performances such as sharpness and color resolution.

Abstract: A heat developable color light-sensitive material is disclosed, which comprises a support having provided thereon at least a light-sensitive silver halide emulsion, a binder, and a compound having a dye moiety within the molecule and which is capable of releasing, upon reduction of light-sensitive silver halide to silver at elevated temperatures, said dye moiety corresponding to or inversely corresponding to the reduction to form a dye different from said compound in terms of diffusibility, wherein said light-sensitive silver halide emulsion is prepared by forming silver halide grains in the presence of a sensitizing dye.