Abstract: A silver halide photographic emulsion comprising at least one spectral sensitizing dye having the following general formula (I):Dye--J.sup.1 --CONH--J.sup.2 --NHNHG--R (I)wherein Dye represents a dye residue capable of becoming a spectral sensitizing dye; J.sup.1 represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted aralkylene group, or a substituted or unsubstituted alkarylene group; J.sup.2 represents a substituted or unsubstituted arylene group; R represents hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or a substituted or unsubstituted iminomethylene group.

Abstract: The use of phenazine, phenoxazine and phenothiazine color forming developers in photothermographic dry silver emulsions provides a stable imaging system under both light and dark storage.

Abstract: A restraining method for restraining the formation of a re-reversal negative image is described, comprising incorporating a cyanine dye or a merocyanine dye which is electron donative and is adsorbable on silver halide in at least one hydrophilic colloid layer of an internal latent image type direct positive silver halide photographic material as a re-reversal restrainer.

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.

Abstract: A heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide emulsion, an organic silver salt, and a binder, wherein silver halide grains in the silver halide emulsion are formed in the presence of sensitizing dyes. This light-sensitive material is greatly improved in its storage stability.

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains a silver halide emulsion which is spectrally sensitized by adding a spectral sensitizing dye prior to the completion of formation of silver halide particles and at least one kind of pyrazoloazole type magenta coupler represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being released upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.N-- or --NH--, one of the Za--Zb bond and the Zb--Zc bond being a double bond and the other being a single bond, and when the Zb--Zc bond is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sup.

Abstract: A heat developable light-sensitive material comprising a support having thereon at least one light-sensitive layer wherein at least one layer comprises a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group each of which may be substituted or unsubstituted; a carboxy group or a salt thereof; R.sub.3 and R.sub.

Abstract: A heat-developable light-sensitive material is described, comprising a support having thereon at least (1) a light-sensitive silver halide, (2) a silver salt oxidizing agent, (3) silver salt particles having adsorbed thereon at least one compound selected from a cyclic imino compound represented by formula (I) described below and a mercapto compound represented by formula (II) described below, (4) a reducing agent, and (5) a binder.Formula (I) is represented by ##STR1## wherein Z represents a non-metallic atomic group forming a heterocyclic ring containing an imino group together with the nitrogen atom of formula (I).Formula (II) is represented byR--S--M (II)wherein M represents a hydrogen atom or an alkali metal atom; and R represents a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted heterocyclic group.

Abstract: A photoresponsive material containing a dye compound having a cyclodextrin or its derivative as a substituent. The photoresponsive material exhibits increased light absorptivity by increasing the amount of spectral sensitizer, the dye compound. The photoresponsive material is useful as a photographic emulsion and the like.

Abstract: A heat developable light-sensitive material containing a novel base precursor (I), which is stable during storage and rapidly decomposes to release a basic component upon heating higher than a certain temperature, has excellent storability and provides an image having a good image quality, i.e., a low fog density and a high image density within a short period of developing time.

Abstract: A process for preparing a silver halide photographic emulsion to be used for a photographic material is provided. Therein, additives such as dyes, sensitizers, auxiliary agents to be used upon gold sensitization, and so on are utilized within a period from at the silver halide grain forming time to just before the emulsion coating, and oxidizing agents are added at the time when the functions of the additives become substantially needless to result in conversion of the additives to those having no bad influences on photographic characteristics of the emulsion prepared, or to those having such chemical structures as to facilitate their removal with a washing treatment or the like.Silver halide emulsions prepared by the described process are also disclosed.

Abstract: Photothermographic imaging chemistry, and particularly color chemistry, can be contained within solid particles. Photothermographic media can then be made by dispersing these particles within a binder in the concentrations and proportions desired.

Abstract: Photographic direct-positive emulsions with silver halide crystals of layered structure are prepared.The silver halide crystals of these emulsions can form a latent internal image and are superficially converted to silver iodide. Normal surface developers are suitable for developing.

Abstract: A photographic emulsion is disclosed containing grains comprised of a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium. The sensitizing dye is present in the form of host crystals, and the grains are in conductive contact with the host dye crystals. A photographic element containing the emulsion is also disclosed.

Abstract: A silver halide photographic light-sensitive material having high sensitivity and high covering power, particularly suitable for use in radiography comprising on a support, a silver halide emulsion layer having silver halide grains which have a grain-size distribution curve comprising at least two peaks of which in the mode form, the highest peak mode and another peak mode adjacent thereto stand leaving a space of 0.10.mu. to 0.30.mu. therebetween. An orthochromatic dye-sensitizer increases the sensitivity.

Abstract: Photographic elements and processes are described which employ a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; wherein:(a) the hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent,(b) the azo group formation causes the release of the photographically useful group, and(c) the released photographically useful group does not contain the linking group or the nitrogen atoms of the hydrazide moiety.

Abstract: A process for producing a spectrally sensitized silver halide photographic emulsion is described, comprising adding a substantially water-insoluble spectral sensitizing dye in an aqueous carrier to an emulsion before completion of the formation of silver halide grains without using an organic solvent.

Abstract: A heat developable light-sensitive material containing a compound represented by the general formula (I):[Ar.sub.n (R).sub.3-n CCO.sub.2 H].sub.l .multidot.B.sub.m (I)wherein ar represents an aryl group or a heterocyclic group; R represents a substituent other than an aryl group and a heterocyclic group; Ar and R may be bonded in a part thereof to form a ring; B represents a mono- or diacidic base which has a pKa of 7 or more and contains 12 or less carbon atoms; n represents an integer from 1 to 3; l and m each represents an integer of 1 or 2 and maintain a relationship in that a number of positive charge and a number of negative charge are equal; when n represents 1 or 2, two R's or Ar's may be the same or different, when n represents 3, three Ar's may be the same or different; and the substituent represented by Ar or R may be further substituted with a substituent.

Abstract: An improvement in silver halide photographic light-sensitive materials having at least one silver halide emulsion layer on a support is disclosed. The improvement is that chemically sensitized silver halide grains contained in at least one of the emulsion layers have a distinct stratiform structure having substantially two parts comprising an inside core part and a shell part of the uppermost layer, wherein the inside core part of said grains is composed of silver halide containing 10 to 45% by mol of silver iodide, the shell part of the uppermost layer of the grains is composed of silver halide containing 5% by mol or less of silver iodide, and the emulsion containing silver halide grains having the distinct stratiform structure have an average silver iodide content of 7% by mol or more. The materials have high sensitivity, low fog and excellent graininess.

Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by quaternized aromatic oxatellurazinium salts. The aromatic oxatellurazinium salts can be initially incorporated in the photographic element as manufactured or during processing.

Abstract: A heat-developable light-sensitive material is disclosed, comprising a support and at least one layer containing a novel base precursor releasing a base by thermal decomposition. The heat-developable light-sensitive material of the invention has an improved long-term stability and can provide a high density image in a short time.

Abstract: A heat-developable light-sensitive material is described which is capable of providing images of high density and low fog in a short period of time, and which is excellent in stability. The heat-developable light-sensitive material comprises a support and formed thereon a heat developable light-sensitive layer, wherein said light-sensitive material contains at least one compound selected from the group consisting of compounds represented by formulae (I), (II), (III) and (IV) as a base precursor ##STR1## wherein symbols represent the same groups as defined in claim 1.

Abstract: A heat developable light-sensitive material having an excellent stability with time and capable of providing a high quality image is disclosed, which contains a base precursor represented by the following general formula (I): ##STR1## wherein A represents an organic residue represented by the following formula (II): ##STR2## X represents an electron attractive substituent having a Hammett's sigma value of more than 0;l represents an integer of 1 to 5 and, when l represents 2 or more, a plurality of Xs may be the same or different;Y represents a substituent having a Hammett's sigma value of 0 or less;k represents an integer of 0 to 5 and, when k represents 2 or more, a plurality of Ys may be the same or different;Z represents a divalent organic residue selected from the group consisting of --C.dbd.

Abstract: A heat developable light-sensitive material comprising a support having thereon (1) a light-sensitive silver halide emulsion, (2) at least one of a base and a base precursor, and (3) a binder, wherein the silver halide emulsion is one which is chemically sensitized in the presence of a sensitizing dye. With the heat developable light-sensitive material, decrease in sensitivity and formation of fog during preservation thereof are prevented.

Abstract: A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to stabilize sensitivity, a carboxyalkyl substituted 3H-thiazoline-2-thione.

Abstract: A heat developable light-sensitive material comprising a support and a heat developable light-sensitive layer formed thereon can produce images of high density and less fog in a short period of time and has excellent aging stability. The light-sensitive material contains as a base precursor at least one compound selected from the group consisting of compounds represented by formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 individually represent hydrogen, alkyl, cycloalkyl, alkenyl, alkynyl, aryl, aralkyl, heterocyclic group, or --CO.sub.2 M wherein M represents hydrogen, alkali metal or H.Bx, and R.sup.1 and R.sup.2 can be joined together to form a ring; R.sup.3 represents hydrogen atom, alkyl, cycloalkyl, alkenyl, alkynyl, aralkyl, aryl, or heterocyclic group; x is equal to 1 when B represents a monoacidic base and equal to 1/2 when B represents a diacidic base; and C* represents an asymmetric carbon atom.

Abstract: A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to reduce pepper fog while maintaining high contrast a polyhydroxybenzene and a carboxyalkyl-3H-thiazoline-2-thione.

Abstract: A silver halide photographic material having at least one layer of silver halide emulsion layers containing a silver halide having a silver chloride content of not less than 25 molar %, characterized in that at least one of said silver halide emulsion layers contains a silver halide sensitized with a compound having the following formula (Ia), and/or a compound having the following formula (Ib) and is hardened with a compound having the following formula (II) and/or a compound having the formula (III); ##STR1## in the above formulae (Ia), (Ib), (II) and (III), R.sub.1 to R.sub.20, Z.sub.1 and Z.sub.2, n.sub.1 and n.sub.2, Q and Q', L, p and q are defined in the specification.The photographic material of the invention not only shows a higher sensitivity, a lower infrared sensor fogging, a superior sharpness or color reproductivity and a superior whiteness but also exerts a good storage property with time or a lower change in sensitivity after storage.

Abstract: Photographic elements and assemblages are described which employ nondiffusible compounds which release photographically useful groups in an imagewise manner as the result of a .beta.-elimination reaction.

Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by amido substituted aromatic tellurochalcogenides. The amido substituted aromatic tellurochalcogenides can be initially incorporated in the photographic element as manufactured or during processing.

Abstract: A photographic element comprising a support and at least one silver halide emulsion layer. The photographic element contains at least one layer containing at least one of the dyes represented by the following formula (I), (II), (III), (IV), (V), (VI), (VII) or (VIII): ##STR1## wherein Z.sub.1 to Z.sub.10 ; R.sub.1 to R.sub.24 ; L.sub.1 to L.sub.18 ; Y.sub.1 to Y.sub.8 ; Q.sub.1 to Q.sub.4 ; X.sub.1 to X.sub.3 ; Ar; h, m, p and r; and t.sub.1 to t.sub.3 are described in the specification.

Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by aromatic tellurochalcogenides. The aromatic tellurochalcogenides can be initially incorporated in the photographic element as manufactured or during processing.

Abstract: A silver halide emulsion rich in chloride is described which has grains having a layered grain structure with a core and at least one layer encasing the core.

Abstract: Combinations of supersensitizers for photographic emulsions have been found which provide increased speed.

Abstract: The addition of water-soluble triaryl compounds selected from the group consisting of phosphines, amines, arsines, bismuthines and stibylidynes provides sensitizing effects and, when added to spectrally sensitized emulsions, provides a supersensitizing effect. The activity of these compounds is additive with other supersensitizers.

Abstract: Polymethine dyes are disclosed containing a tellurazolium nucleus which is substituted at its 2-position with methine chain which is in turn substituted at its .beta. position with a dye property modifier. These dyes can be used in photographic elements to facilitate image formation.

Abstract: A photographic construction comprises at least one spectrally-sensitized polymeric binder layer containing photographic silver halide and, in association therewitha. a non-light sensitive organic silver salt oxidizing agent,b. at least one biphenol color-forming reducing agent having the formula ##STR1## wherein each R is independently selected from a straight chain or branched alkyl or alkoxy group having 1 to 6 carbon atoms, and phenyl, and R.sup.1 is hydrogen or an alkalilabile protecting group, andc. at least one aliphatic or aromatic carboxylic acid of a specific class, which preferably is p-aminobenzoic acid, as development modifier, andd. optionally, at least one toner.

Abstract: Improved heat developable silver films are produced upon coating and drying a binder composition containing (a) a substantially light-insensitive silver sulfinate, (b) a silver halide photocatalyst, and (c) a developer. A preferred film contains (a) silver hexadecylsulfinate, (b) a separately sensitized silver halide emulsion and (c) a Phenidone or Dimezone moiety in a coalesced latex binder.

Abstract: A spectrally sensitized silver halide photographic element capable of producing a stable, viewable silver image on development and fixing out is disclosed. The latent image forming silver halide grains in the image recording emulsion layer or layers of the photographic element are silver bromide, chloride, or chlorobromide grains. At least one of the image recording emulsion layers contains spectrally sensitized tabular grains. Located in proximity to the spectrally sensitized tabular grains are relatively fine high iodide silver halide grains capable of being dissolved during fixing out.

Abstract: A silver halide photographic light-sensitive material which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material contains a blocked photographic agent therein represented by formula (I): ##STR1## wherein A represents a photographic agent moiety which is bonded to a blocking moiety through a hetero atom or a group which is bonded to a blocking moiety through a hetero atom and capable of releasing a photographic agent upon a subsequent reaction after the group is released; Y represents a hydrogen atom or a substituent; and Z represents an atomic group necessary to form a carbocyclic ring or a heterocyclic ring.The precursor of photographic agent is completely stable during the preservation of the photographic light-sensitive material and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material.

Abstract: High aspect ratio tabular grain direct reversal silver halide emulsions are disclosed. The emulsions can be incorporated in photographic elements, such as multicolor photographic elements. Image transfer film units incorporating these direct reversal emulsions are specifically disclosed.

Abstract: Alkanediyl bridged benzimidazolo monomethine cyanine dyes are disclosed wherein at least one benzimidazolo nucleus is provided with an electron-withdrawing group. A disclosed preparation of the dyes includes producing an electron-withdrawing group substituted bis(2-nitrophenyl)-2-R.sup.1 -propanediamide, where R.sup.1 is hydrogen or alkyl; converting the nitro groups to primary amine substituents; removing the elements of water to effect ring closure; and thereafter providing the -CR.sup.1 - linked benzimidazole nuclei so formed with an N,N'-alkanediyl bridging group and quaternizing substituents. Dye synthesis is completed by reducing the -CR.sup.1 - linking group to the corresponding methine. The dyes are useful as sensitizers in silver halide emulsions and photographic elements.

Abstract: Photothermographic emulsions display enhanced spectral sensitization when the silver halide grains are formed in the presence of one or more spectral sensitizing dyes.

Abstract: A method for producing a photographic emulsion is disclosed. The method includes the process of adding a dispersion of a substantially water-insoluble photographic additive to a photographic emulsion. The dispersion being prepared merely by mechanically grinding and dispersing the photographic additive in a form of fine grain having a size of 1.mu. or less in an aqueous system adjusted to a pH value of 6 to 8 and controlled to a temperature of 60.degree. to 80.degree. C. The additive is included in the photographic emulsion without the need of an organic solvent. The emulsion of the invention can be easily and quickly coated to form a uniform layer.

Abstract: Many photographic materials must be handled under special lighting conditions in order to prevent exposure of the material. The use of large concentrations of bleachable light absorbing layers over the photosensitive emulsion tends to leave an undesirable residual stain. The inclusion of a specific class of low intensity reciprocity failure inducers to silver halide emulsions enables the emulsions and their photographic articles to be safely handled under white light conditions.

Abstract: There is disclosed a light-sensitive silver halide color photographic material having a silver halide emulsion layer containing at least one layer of a negative working silver halide on a support, comprising the negative working silver halide comprises at least 80 mole % of silver chloride, and being color sensitized with at least one kind of sensitizing dyes having the local maximum value of spectral sensitivity in the wavelength region from 445 nm to 490 nm and at least one kind of sensitizing dyes having the local maximum value of spectral sensitivity in the wavelength region from 420 nm to less than 445 nm.The photographic material according to this invention exhibits excellent color reproducibility and quick process suitability.

Abstract: Silver halide emulsions of limited iodide content, processes for the preparation of these emulsions, photographic elements incorporating these emulsions, and processes for the use of the photographic elements are disclosed. In the emulsions silver halide grains predominantly bounded by {111} crystal faces and containing insufficient iodide to direct silver salt epitaxy to selected surface sites of the grains are present. Silver salt is epitaxially located on and substantially confined to selected surface sites of the silver halide grains, this being accomplished by the use of an adsorbed site director.

Abstract: A novel silver halide photographic element which contains a nondiffusible complex capable of releasing a diffusible, photographically useful material is disclosed.Said nondiffusible complex becomes active for ligand exchange upon reduction under alkalin conditions to release a diffusible, photographically useful material, said complex being represented by the following formula: ##STR1## wherein La is a quadridentate ligand group; Lb is a didentate ligand group; BALL is a ballast group; PHOTO is a photographically useful material group; Y is a counter ion; and r is the number of counter ions necessary for neutralizing the electric charge on the CO(III) complex.

Abstract: A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula: ##STR1## wherein: R.sup.10 and R.sup.20 (same or different)(1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form,(2) represent an aryl group including a substituted aryl group, or(3) represent a heterocyclic ring residue including such residue in substituted form, orR.sup.10 and R.sup.20 are ringclosed, either R.sup.10 or R.sup.20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid;L.sup.1 and L.sup.2 (same or different) represent a ##STR2## --SO.sub.

Abstract: Polymers having excellent adherence to film supports such as cellulose acetate are disclosed. The polymers comprise random recurring units having the structure--A).sub.w, --B).sub.x, --C).sub.y and --D).sub.zwherein;A represents polymerized vinyl acetate;B represents a polymerized acrylate or methacrylate monomer capable of copolymerization with vinyl acetate;C represents a polymerized monomer selected from the group consisting of methacrylic acid, itaconic acid and vinylbenzoic acid;D represents a polymerized cationically charged copolymerizable monomer;w represents from 20 to 85 weight percent;x represents from 5 to 65 weight percent;y represents from 5 to 50 weight percent and;z represents from 0 to 15 weight percent.