Abstract: A silver halide photographic emulsion is provided, containing a monomethine-cyanine dye, a trimethine-cyanine dye and a supersensitizer represented by the following Formula [I] or Formula [II]. The cyanine dyes are incorporated in the form of a dispersion of solid particles.

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 method of forming radiation images, especially X-ray images of bones and gastric areas for medical examination, is disclosed.

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 color photographic material for diffusion transfer which comprises a support having thereon at least one light-sensitive silver halide emulsion layer containing a combination of a reducible dye providing compound represented by the following general formula (I) and an electron donor, said reducible dye providing compound releasing a diffusing dye when reduced, wherein at least one layer of silver halide emulsion layers contains a silver halide emulsion obtained by treating a silver halide emulsion, previously chemical sensitized in the presence of a sensitizing dye, with a solid adsorbent to desorb a part or the whole of the adsorbed dye.PWR-(Time).sub.t -Dye (I)wherein PWR represents a group which releases -(Time).sub.t -Dye when reduced; Time represents a group which releases Dye through subsequent reactions after -(Time).sub.t -Dye is released from PWR; t represents an integer of 0 or 1; and Dye represents a dye or a precursor thereof.

Abstract: An improved process for manufacturing a spectrally sensitized photographic element comprising the combination of ultrafiltration of silver halide grains in combination with a supersensitizing additive consisting of ##STR1## wherein D.sup.+ is Na.sup.+, K.sup.+, Li.sup.+, NH4.sup.+ ; n is 1-5; m is 1-10.

Abstract: The invention is accomplished by providing a combined process of chemical and spectral sensitization comprising providing a silver halide emulsion, adding a sulfur or gold chemical sensitizer, adding a finish modifier ##STR1## wherein X is --O--, --S--, --Se--, ##STR2## Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus or together represent the atoms completing a fused aromatic nucleus; R is hydrogen or lower alkyl of from 1 to 5 carbon atoms; and R.sub.1 is a hydrogen or methyl, provided that Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus when R.sub.1 is hydrogen, adding dye, andadding a hydrolyzable quaternized chalcogenazolium salt of a middle chalcogen,heating to a temperature sufficient to cause sensitization of said silver halide to take place, and cooling to recover the sensitized emulsion.

Abstract: A silver halide photographic material having at least one light-sensitive silver halide emulsion layer coated on a support, wherein the silver halide emulsion layer contains silver chlorobromide grains comprising silver chlorobromide containing 90 mol % or more of silver chloride, having at least one region in which the silver bromide content is high at the vicinity of the corner of the grains, and with not more than 15 mol % of average silver bromide content at the surface of the grains. A method producing the silver halide photographic materials is also disclosed.

Abstract: A process for controlling the silver halide grain-to-grain distribution of a variable contrast dye in a light sensitive silver halide emulsion layer of a variable contrast photographic element, and thereby adjusting the low contrast characteristic curve of the element, is disclosed comprising the process steps of adding a green variable contrast sensitizing dye of the following formula (I) to a silver halide emulsion for a variable contrast photographic element, adding a blue sensitizing dye of the following formula (II) to the same silver halide emulsion, and coating the emulsion on a support. In the process, the green and blue sensitizing dyes are added to the emulsion at substantially the same time, and the green dye is added in an amount less than that required to impart maximum sensitivity to all of the silver halide in the emulsion. ##STR1## In formula (I), R.sup.1, R.sup.2, R.sup.6 and R.sup.

Abstract: A method of preparing a photographic element containing a UV filter composition. In the method a UV absorbing polymer latex is prepared by emulsion polymerization, then loaded with a high boiling point organic solvent. The high boiling poing organic solvent has a boiling point at atmospheric pressure of at least 200.degree. C. The loaded polymer latex is then incorporated into a photographic element. Photographic elements containing UV polymer latexes particularly of a UV absorbing polymer containing benzotriazole monomers loaded with high boiling point organic solvents, are also provided.

Abstract: 5-Substituted-amino-1,2,3,4-thiatriazoles have been found to be supersensitizers for silver halide photographic emulsions spectrally sensitized to the red region of the electromagnetic spectrum.

Abstract: The improved silver halide photographic material is such that the silver halide grains contained in at least one light-sensitive silver halide emulsion layer are spectrally sensitized with a sensitizing dye represented by the following general formula: ##STR1## where R.sup.1 and R.sup.2 each represents an alkyl group having 1-10 carbon atoms or an alkenyl group having 3-10 carbon atoms; R.sup.3 represents a hydrogen atom, a heterocyclic group, an aryl group or an alkyl group; R.sup.4 and R.sup.5 each represents an alkyl group; Z.sup.1 represents the group of non-metallic atoms necessary to form a 5-membered monocyclic or condensed nitrogenous hetero ring; L.sup.1 and L.sup.2 each represents a methine group, provided that R.sup.1 or R.sup.2 may combine with L.sup.1 or L.sup.2, respectively, to form a 5- or 6- membered hereto ring; X.sup.1 represents an ion that cancels an electric charge in the molecule; .sup.1 represents the number of ions necessary to cancel electric charges in the molecule.

Abstract: A radiation detecting element, particularly a photographic element having a radiation detecting composition, in particular a silver halide emulsion. The composition provides the element with a wavelength of peak sensitivity, .lambda.peaksens, and a decreasing sensitivity around .lambda.peaksens. An absorber dye of defined characteristics is chosen, which has the effect of decreasing the change in sensitivity which the element otherwise has without the absorber dye (that is, the absorber dye increases the wavelength range over which the sensitivity is relatively constant). The element is preferably sensitive to infra-red.

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.

Abstract: There is disclosed a silver halide color photographic material containing a support having thereon three color-forming layers, which comprises, in said color-forming silver halide emulsion layers, high-silver-chloride grains, silver halide grains in the cyan color-forming layer being spectrally sensitized with a red-sensitive sensitizing dye having a prescribed reduction potential, and/or, in the cyan color-forming layer, an oil-soluble cyan coupler that cause coupling reaction with the oxidized product of an aromatic primary amine developing-agent to form a nondiffusible dye, a compound represented by formula (I) or (II), and a compound represented by formula (II) or (IV). ##STR1## wherein R.sub.1 and R.sub.3 each represent a hydrogen atom, an alkyl group, or a halogen atom, R.sub.2, R.sub.4, R.sub.5, R.sub.7, and R.sub.

Abstract: A novel silver halide photographic material comprising at least one silver halide emulsion layer on a support is provided, characterized in that said emulsion layer comprises (i) silver halide grains which are at least 80 mol % silver chloride, (ii) at least one thiocyanate, (iii) at least one cyanine dye represented by general formula (I) and (iv) at least one compound represented by general formula (II), (III) or (IV): ##STR1##

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: An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive silver halide color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidable leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least one layer sensitized to radiation within the infrared region of the electromagnetic spectrum.

Abstract: In a method of manufacturing a silver halide emulsion which comprises a silver chlorobromide having a silver chloride content of 90 mol% or more or silver chloride and said silver halide containing substantially no silver iodide, the improvement which comprises the steps of,(i) adding to a reactor a compound capable of spectrally sensitizing the silver halide emulsion in a wavelength range between 590 nm and 720 nm, and(ii) then adding to the reactor a compound capable of spectrally sensitizing the silver halide emulsion in a wavelength range between 390 nm and 590 nm,prior to the completion of chemical sensitization of the silver halide emulsion, and color photographic material having the emulsion manufactured by the method.

Abstract: A multilayer silver halide color photographic element comprising at least one blue-sensitive silver halide emulsion layer comprising a blue spectral sensitizing dye and a supersensitizing amount of a disulfide compound of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, equal or different, each represents a hydrogen atom or a lower alkyl group, R.sub.5 represents a hydrogen atom, a formyl group or an acetyl group, R.sub.6 and R.sub.7, equal or different, each represents a hydrogen atom or a lower alkyl group, or R.sub.6 and R.sub.7 represent the elements needed to complete an unsaturated cyclic nucleus.The combination provides a blue-sensitive silver halide emulsion layer having high sensitivity, low fog and good resistance against fading of the latent image.

Abstract: A method for spectrally sensitizing silver halide emulsions is disclosed, comprising the step of adding a cyanine dye, which provides a J-band when added to silver halide emulsions, to a silver halide emulsion followed by ripening with such conditions that the relative quantum yield .phi..sub.r of spectral sensitization assumes a value of 1/2 or less of the .phi..sub.r of spectral sensitization obtained when the dye is added to the emulsion under ripening conditions of 40.degree. C. and 20 minutes from the time of addition of the dye to the emulsion until the time of coating the emulsion, and then ripening the silver halide emulsions. In one embodiment of the disclosed method, a heterocyclic compound which contains a mercapto group is added to the emulsion before the addition of the dye in an amount sufficient to increase the .phi..sub.r.

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: A silver halide photographic material comprising a support having thereon at least one sensitive silver halide emulsion layer, wherein said emulsion layer comprises a monodisperse emulsion and said emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative and at least one redox compound capable of releasing a development inhibitor when oxidized.

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

Abstract: A novel silver halide color photographic material is provided which comprises a support having coated thereon at least three silver halide emulsion layers having maximum spectral sensitivities in at least three sensitive wavelength ranges of 400 nm to 500 nm, 500 nm to 570 nm and 650 nm to 730 nm and is sensitive to said three sensitive wavelength ranges to form yellow, magenta and cyan dye images, respectively, characterized in that said silver halide color photographic material has additionally at least one function to provide a maximum spectral sensitivity in wavelength range other than said three sensitive wavelength ranges and to form any of yellow, magenta or cyan dye image by an exposure to the light of said other wavelength range. A color image formation method is also disclosed which comprises exposing said silver halide color photographic material to light in a print exposure process in combination with a scanning exposure process, and then developing said silver halide color photographic material.

Abstract: A full color recording material which has, on a support, at least three silver halide photosensitive emulsion layers which have different color sensitivities and which contain a yellow coupler, magenta coupler and cyan coupler, respectively, and in which at least two of these layers are selectively spectrally sensitized to match semiconductor laser light beams of wavelengths greater than 670 nm, wherein said at least three silver halide photosensitive layers which have different color sensitivities each contains silver chlorobromide grains with a layer average silver chloride content of at least 96 mol %, and said silver chlorobromide grains have a silver bromide local phase of which the silver bromide content is higher than that of the surroundings and a method for forming color images wherein the recording material is imagewise exposed while being transported at a feed rate which matches the scanning rate with semiconductor light beams, and substantially continuously to the exposing, the material is subject

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

Abstract: A novel silver halide color photographic material is provided which comprises a support having coated thereon at least three silver halide emulsion layers having maximum spectral sensitivities in at least three sensitive wavelength ranges of 400 nm to 500 nm, 500 nm to 570 nm and 650 nm to 730 nm and is sensitive to said three sensitive wavelength ranges to form yellow, magenta and cyan dye images, respectively, characterized in that said silver halide color photographic material has additionally at least one function to provide a maximum spectral sensitvity in wavelength range other than said three sensitive wavelength ranges and to form any of yellow, magenta or cyan dye image by an exposure to the light of said other range. A color image formation method is also disclosed which comprises exposing said silver halide color photographic material to light in a print exposure process in combination with a scanning exposure process, and then developing said silver halide color photographic material.

Abstract: A silver halide photographic emulsion is disclosed, comprising a combination of at least one infrared sensitizing dye represented by formula (Ia) or (Ib) and at least one compound represented by formula (IIa) or (IIb): ##STR1## wherein each of the variables is as defined in the specification.

Abstract: A silver halide photographic material is disclosed, which comprises a support having coated thereon at least one silver halide emulsion layer, wherein the emulsion layer comprises tabular grains of silver chloride, silver bromide, silver chlorobromide or silver chloroiodobromide having an iodide content of 1 mol % or less, which have an average aspect ratio of 3 or more and which have been spectrally sensitized with at least one spectral sensitizing dyes described below.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive layer comprising a silver halide emulsion sensitized by an infrared sensitization dye, wherein the silver halide in the silver halide emulsion contains at least 90 mol % of silver chloride and is constituted by monodisperse grains having a coefficient of variation of not more than 20%; and an image formation method using the above-described silver halide photographic photosensitive material, comprising the steps of imagewise exposing the photographic material and developing the said material in a developing solution containing at least 0.15 mol/l of sulfurous acid ions and a compound having a silver halide-adsorption accelerating group.

Abstract: A negative silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein said silver halide emulsion layer or another hydrophilic colloid layer provided on the support contains (i) a hydrazine derivative, (ii) at least one cationic dye selected from the group consisting of cyanine dyes, hemicyanine dyes and rhodacyanine dyes, and (iii) a compound represented by formula (I) and having substantially no absorption maximum at the visible region; ##STR1## wherein Z.sup.11, Z.sup.12, R.sup.11, R.sup.12, X and n are defined in the specification.

Abstract: A high-speed color negative photographic material which comprises, a support having provided thereon, at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive emulsion layer, and is designated so as to acquire a specific photographic sensitivity (defined in detailed description of the invention) of 800 or above, and has a combined total of silver coverages ranging from 3.0 g/m.sup.2 to 9.0 g/m.sup.2 so as to minimize an increase in fog, a decrease in photographic speed and deterioration in granularity, which heretofore have occurred in high-speed photographic materials during long-range storage before used. In addition, the present photographic material enables enhancement of pressure resistance and processing efficiency.

Abstract: A silver halide photographic material comprising a support having thereon a hydrophilic colloid layer which contains gelatin and wherein the hydrophilic colloid layer contains fine polymer particles which contains a redox compound which is capable of releasing a development inhibitor by oxidation, and a hydrazine compound, which is not the same as the redox compound, is contained in the hydrophilic colloid layer and/or in another hydrophilic colloid layer.

Abstract: A photographic element is described comprising a support having thereon a silver halide emulsion layer where the silver halide is sensitized with a dye having the formula: ##STR1## wherein where Z.sub.1, Z.sub.2, Z.sub.3, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and X are as defined herein.

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

Abstract: Supersensitization of silver halide emulsions is effected by the addition of a metal chelating agent after chemical sensitization or a combination of phenylmercaptotetrazoles and a metal chelating agent to a spectrally sensitized emulsion. The contrast of the emulsion may also be increased by the addition of this combination of materials after chemical and spectral sensitization.

Abstract: Photographic silver halide emulsion, sensitized for infrared spectral region, containing an aromatic thiosulfonic acid or a salt of the acid. The emulsion is useful for preparing photographic elements having sensitivity in the infrared spectral region.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer spectrally sensitized by at least one adsorptive spectral sensitizing dye, wherein the emulsion layer or a hydrophilic colloid layer adjacent to the emulsion layer contains at least one compound represented by following formula (I), (II), or (III); ##STR1##A.sub.2 --Time.sub.1).sub..sbsb.t.sbsb.1 X (II)A.sub.3 --Time.sub.2).sub.t.sbsb.2 Y (III)(all the symbols of which are defined in the specification) are disclosed.

Abstract: The addition of certain classes of organic salts to infrared sensitive silver halide photographic emulsions can provide supersensitization, improved liquid hold time stability, and photographic emulsion stability.

Abstract: A silver halide photographic material is disclosed, which comprises at least one silver halide emulsion layer on a support, at least one of the emulson layer and other layers contains at least one hydrazine derivative and at least one of these layers contains at least one compound having both a silver halide adsorbing group and an acid group represented by the general formula (I):C-L-D (I)wherein C represents a group that enhances adsorption to silver halide, D represents an acid group, and L represents a divalent linking group,and possessing substantially no absorption maximum in the visible region. A method for forming superhigh contrast negative images is also disclosed, comprising imagewise exposing this silver halide photographic material, followed by developing with a developing solution containing sulfite ions in an amount of about 0.15 mol or more per liter and having a pH of about 10.5 to about 12.3.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing at least 1.0.times.10.sup.-4 gram equivalent of an anionic surface active material as anion per gram of a hydrophilic dispersion medium in the emulsion layer, the material having dispersed in the emulsion layer a light-collecting dye that has an emission band overlapping at least partially with the optical absorption band of a spectral sensitizing dye on a silver halide grain present in the emulsion layer, the light-collecting dye having an emission quantum yield of at least 0.1 at a concentration of 10.sup.-4 mol/dm.sup.3 in dry gelatin at room temperature, with the proviso that the light-collecting dye and the spectral sensitizing dye may be the same compound.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing at least one emulsion in which chemically sensitized silver halide grains are composed of tabular silver halide grains having a diameter of a circle corresponding to the projected area of at least 0.4 .mu.

Abstract: This invention provides a silver halide photographic light sensitive material and a light sensitive lithographic printing plate material which are enhanced in sensitivity to semiconductor laser beam and improved in storage stability and printing endurance. The former comprises a support and a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm wherein said emulsion layer contains a water-soluble polymer containing a carboxyl group and having a number-average molecular weight of 20,000 or less and the latter comprises a support and, provided thereon, a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm and a physical development nuclei layer and said emulsion layer contains the above mentioned water-soluble polymer.

Abstract: A silver halide color photographic material composed of a support having thereon at least one light-sensitive silver halide emulsion layer, the material having a specific photographic sensitivity of at least 320 and a surface spectral reflectance of from 20% to less than 35% at a wavelength of 600 nm on the emulsion side film surface. The high sensitivity color photographic light-sensitive material provides superior exposure when used in an automatic exposure camera.

Abstract: A silver halide photographic emulsion comprising a silver halide emulsion, at least one ascorbic acid compound, a bisaminostilbene compound substituted by a pyrimidine derivative, and at least one sensitizing dye as described herein, exhibits an increased inhibition of desensitization due to the use of a sensitizing dye and an increase in the spectral sensitivity of the photographic emulsion.

Abstract: 5-substituted-thio-1,2,3,4-thiatriazoles and 5-substituted-oxy=1,2,3,4-thiatriazoles have been found to be supersensitive for silver halide photographic emulsions spectrally sensitized to the red and infrared regions of the electromagnetic spectrum.

Abstract: Disclosed is a silver halide photographic light sensitive material which has a silver halide emulsion layer optically sensitized with a sensitizing dye having a maximum spectral sensitivity in the region of at least 700 nm, said emulsion layer containing at least one compound represented by the following formula (I) or at least one compound represented by the general formula (I) and at least one compound represented by the general formula (II) in combination: ##STR1## (wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an amino group, an acylamido group or a sulfonamido group and sum of carbon atom numbers of R.sub.1 and R.sub.2 is 3 or more.); ##STR2## (wherein R.sub.3 represents an alkyl group of at least 3 carbon atoms or an aryl group).

Abstract: A silver halide photographic material is disclosed containing at least one silver halide emulsion layer, in which (1) the silver halide grains constituting the emulsion layer have been spectrally sensitized by at least one adsorbable spectral sensitizing dye added thereto before the completion of chemical ripening of the grains, and (2) at least one luminous dye which has a quantum efficiency of 0.1 or more when the concentration thereof in dry gelatin at room temperature is 10.sup.-4 mol/dm.sup.3 and which can be substantially completely removed by development is added to a hydrophilic dispersion medium for the emulsion layer exclusive of the silver halide grains in a concentration of 2.0 mmol/dm.sup.3 in the dispersion medium. The addition of the spectral sensitizing dye is not limitative and can be either before the completion of the formation of the silver halide grains or during a stage from the completion of the formation of the grains to the completion of the chemical ripening thereof.

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, whereina maximum sensitivity wavelength .lambda..sub.R of a spectral sensitivity distribution of said red-sensitive silver halide emulsion layer is in a range of 595 nm.ltoreq..lambda..sub.R .ltoreq.625 nm;a maximum sensitivity wavelength .lambda..sub.G of a spectral sensitivity distribution of said green-sensitive silver halide emulsion layer is in a range of 530 nm.ltoreq..lambda..sub.G .ltoreq.560 nm; anda sensitivity of said green-sensitive silver halide emulsion layer at 500 nm is not less than one-fourth of the sensitivity at the maximum sensitivity wavelength .lambda..sub.G.