Abstract: Disclosed is a method for image formation which comprises developing a silver halide photographic photosensitive material in the presence of a compound represented by the following formula [I] or [II]: ##STR1## wherein Ar represents an aryl group, R.sub.1, R.sub.2 and R.sub.3 which may be identical or different each represents a hydrogen atom, an alkyl group, an aralkyl group, an aryl group, or a heterocyclic group, with a proviso that they cannot be simultaneously hydrogen atoms, R.sub.1 and R.sub.2 may link to each other to form a ring, and at least one of R.sub.1, R.sub.2 and R.sub.3 has at least one hydroxyl group as a substituent, ##STR2## wherein Ar.sub.1 and Ar.sub.2 each represents a divalent aromatic group, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R.sub. and R.sub.2 may link to each other to form a ring and R.sub.3 and R.sub.

Abstract: Silver halide photographic elements which are capable of high-contrast development and are especially useful in the field of graphic arts comprise surface latent image forming high-chloride silver halide grains and have incorporated therein a hydrazine compound which functions as a nucleator, an amino compound which functions as an incorporated booster, and a combination of a gold compound and a urea compound which functions as a chemical sensitizer. Urea compounds effective for this purpose are 1,1,3,3-tetra-substituted middle chalcogen urea compounds in which at least one substituent comprises a nucleophilic center.

Abstract: A direct positive silver halide photographic light-sensitive material which is improved in gradation and suitable for rapid processing comprises a support having thereon a silver halide emulsion layer containing surface-fogged type direct positive silver halide grains, wherein said direct positive silver halide emulsion layer comprises two or more silver halide emulsions substantially different in sensitivity and/or gradation; the ratio of the total area of (111) face to and total surface area of grains in said emulsions is not less than 50%; and the average silver iodide content of grains in said emulsions is not more than 5 mol%.

Abstract: A silver halide photographic material which provides a negative image is disclosed. The photographic material contains a compound represented by formula (I): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; and Z represents an atomic group necessary to form a nitrogen-containing heterocyclic aromatic group, and provides a negative image having high contract, high sensitivity, an satisfactory dot image quality.

Abstract: A silver halide photographic material which comprises a support having provided thereon at least one light-sensitive emulsion layer, and which contains in said emulsion layer, or at least one other layer, at least one hydrazine derivative, at least one contrast enhancing agent and at least one redox compound capable of releasing a development inhibitor upon being oxidized. The hydrazine derivative is exemplified by compounds represented by the following formula: ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; and A.sub.1 and A.sub.2 both represent a hydrogen atom, or, alternatively, one of them represents a hydrogen atom and the other represents an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.

Abstract: Silver halide photographic elements which are capable of high contrast development and are especially useful in the field of graphic arts have incorporated therein a hydrazine compound which functions as a nucleator, an amino compound which functions as an incorporated booster, and a ballasted thioether isothiourea which functions to inhibit pepper fog and restrain image spread.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the silver halide photographic material contains at least one photographic agent represented by the following formula (I): ##STR1## wherein X represents a hydrogen atom or a group capable of forming a hydrogen atom upon hydrolysis; Time represents a divalent linking group; PUG represents a photographically useful group; V represents ##STR2## wherein R.sub.0 represents n alkoxy group or an aryloxy group, ##STR3## an iminomethylene group or ##STR4## R.sub.1 represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an alkoxy group, an aryloxy group, an amino group or --CHR.sub.2 --(Time).sub.m PUG; R.sub.2 represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; m represents 0 or 1; and n represents 0 or 1.

Abstract: Photographic silver halide materials containing aryl hydrazides as defined and novel aryl hydrazides with a cationic group in the acyl radical enables the preparation of photographic materials that can be developed rapidly to ultrahigh contrast at a relatively low pH value. The photographic materials are useful in reprography, particularly screening for halftone images.

Abstract: A silver halide color photosensitive material is disclosed. The photosensitive material comprises a support and a hydrophilic colloidal layer containing a yellow coupler. According to the present invention, the layer further contains a color image stabilizer in an amount of 10 to 200 mole % based on the amount of the yellow coupler. The color image stabilizer and the yellow coupler are together contained in droplets of a medium which are dispersed in the layer. The color image stabilizer is an organic compound having the following formula [I] or [II]: ##STR1## in which each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently is hydrogen, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphoryl group, a carbamoyl group or a sulfamoyl group; each of R.sup.5 and R.sup.

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: Disclosed is a direct positive photographic material comprising a support having thereon at least one photographic emulsion layer containing previously non-fogged internal latent image-type silver halide grains, wherein the photographic emulsion layer contains at least one compound of formulae (I), (II) and (III) preferably along with at least one compound of formulae (IV), (V) and (VI), and that the internal latent image-type silver halide grains are silver bromide, silver chloride, silver iodobromide, silver chlorobromide or silver chloroiodobromide grains and contain at least one metal of manganese, copper, zinc, cadmium, rhenium, lead, bismuth, indium, thallium, zirconium, lanthanum, chromium, mercury and metals of Group VIII of the Periodic Table.M.sub.2 SO.sub.3 (I)MHSO.sub.3 (II)M.sub.2 S.sub.2 O.sub.5 (III)wherein M represents a hydrogen atom or a cation.R--SO.sub.2 S--M.sup.1 (IV)R--SO.sub.2 S--R.sup.1 (V)R--SO.sub.2 S--L.sub.m --S.O.sub.2 S--R.sup.2 (VI)wherein R, R.sup.1 and R.sup.

Abstract: Disclosed is an autopositive silver halide photographic material which comprises at least one silver halide emulsion layer, characterized in that said emulsion layer or at least one other hydrophilic colloid layers contains at least one compound selected from the group consisting of compounds represented by the following general formulas (1), (2) and (3): ##STR1## wherein R.sub.1 represents hydrogen atom or an alkyl group; and R.sub.2, R.sub.3 and R.sub.4 each represents hydrogen atom, a halogen atom, an alkyl group or an alkoxy group; ##STR2## wherein R.sub.5 represents hydrogen atom or an alkyl group; and R.sub.6 and R.sub.7 each represents hydrogen atom, an alkyl group, a halogen atom or an aryl group; ##STR3## wherein R.sub.8 represents a lower alkylene group; X represents a halogen atom, nitro group, hydroxy group, a cyano group, a lower alkyl group, a lower alkoxy group, ##STR4## or --SO.sub.3 M; R.sub.12 represents hydrogen atom, --OM, a lower alkyl group, a lower alkoxy group or ##STR5## R.sub.

Abstract: A photographic printing paper support is described in which a raw paper material is prepared at a neutral pH range using a copolymer-type cationic polyacrylamide in the presence, when required, of an epoxidized higher fatty acid amide, both sides of the raw paper being coated with a polyolefin resin. Based on this production process, the permeation of developing solution into the support at the time of development processing can be sufficiently prevented. Also, wetting on the wire during the manufacture of the support can be improved. With the use of the epoxidized higher fatty acid amide as a sizing agent, the production cost can be reduced significantly.

Abstract: A silver halide photographic material suitable for photomechanical process is disclosed, which has at least one silver halide photographic emulsion hydrophilic colloid layer and contains at least one redox compound capable of releasing a development inhibitor by oxidation and at least one compound of general formula (I') in the photographic emulsion layer or in at least one other hydrophilic colloid layer: ##STR1## wherein the variable terms are as defined in the specification.

Abstract: Photographic light-sensitive silver halide material for forming direct-positive images comprising a support, a light-sensitive emulsion layer comprising unfogged internal latent image-type silver halide grains dispersed in a hydrophilic colloid binder and comprising a development nucleator, and at least one protective hydrophilic colloid layer, wherein said light-sensitive emulsion comprises at least one compound that during the development of said material in a surface developer provides iodide ions, the weight ratio of the hydrophilic colloid binder of said emulsion layer to silver halide expressed as silver nitrate ranging from 0.4:1 to 3:1, and said protective hydrophilic colloid layer having a thickness in dry state of 1 to 3 .mu.m. The present invention also relates to a method for making direct-positive images with such a photographic light-sensitive silver halide material.

Abstract: Photographic elements are described havinga silver halide emulsion layer,a pyrazoloazole coupler in reactive association with said silver halide emulsion, anda competitor for oxidized developer in reactive association with said coupler having the formula: ##STR1## R.sup.1 represents an electron donating group, R.sup.2 represents hydrogen, alkyl, alkoxy, aryl, aryloxy, aralkyl or amino of the formula --NHR.sup.3, where R.sup.3 is phenyl or benzyl, with the proviso that at least one of the substituents R.sup.1 and R.sup.2 (a) represents a ballast group of sufficient size as to render the hydrazide compound non-diffusible in the photographic element prior to developement in alkaline processing solution and (b) comprises a polar group, andn is 0, 1 or 2.

Abstract: A silver halide photographic light-sensitive material having a support and provided thereon, at least one silver halide emulsion layer containing Compound [I] or Compound [II] represented by Formula [I] or [II] is disclosed; ##STR1##

Abstract: A silver halide photographic material comprising;a support; at least one light-sensitive silver halide emulsion layer containing a hydrazine derivative on the support; at least one hydrophilic colloid layer containing a redox compound capable of releasing a development inhibitor upon oxidation; and a developing agent incorporated, at least, into the at least one light-sensitive silver halide emulsion layer or the at least one hydrophilic colloid layer and a method for forming an image which comprises the steps of imagewise exposing to light the silver halide photographic material described above; and developing the exposed material with a developing solution having a sulfite ion concentration of at least about 0.15 mol/l and a pH of from about 10.5 to about 12.3.

Abstract: An improved silver halide photographic material that has at least one silver halide emulsion layer on a support and that contains a hydrazine derivative in said emulsion layer or an adjacent layer. The improvement is that said emulsion layer or at least one of the other hydrophilic colloidal layers contains at least one of the compounds represented by the following general formulas (I) and (II): ##STR1## wherein R.sub.1 and R.sub.1 ' are each a group selected from among a substituted or unsubstituted alkane residue, an alkene residue, a benzene residue, a cyclohexane residue and a nitrogenous heterocyclic residue; R.sub.2 is a substituted or unsubstituted alkyl group; R.sub.3, R.sub.3 ', R.sub.4 and R.sub.4 ' are each a hydrogen atom or a substituted or unsubstituted methyl group, provided that R.sub.3 and R.sub.4 or R.sub.

Abstract: An image forming method for forming a black-and-white image with a gamma value of at least 8 is disclosed, which comprises processing an imagewise expsed negative type photographic material having at least one silver halide emulsion layer on a support, and containing a hydrazine derivative represented by formula (I) in the emulsion layer or in another hydrophilic colloid layer on the support, with a developer having a pH of 11.2 or less, wherein the silver halide grains are octahedral or tetradecahedral grains: ##STR1## wherein R.sub.1 represents an aliphatic or aromatic group, R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group, G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group ##STR2## group, or an iminomethylene group, and A.sub.1 and A.sub.

Abstract: A silver halide photographic material which provides a negative image contains a compound represented by formula (I): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; Z represents a development inhibitor group containing an anionic functional group as a partial structure; "Time" represents a divalent group; and n is 0 or 1.

Abstract: A process for stabilizing aqueous solution of aryl hydrazides is described. These solutions may be made by the addition of a stabilizing amount of ascorbic acid, isoascorbic acid, erythorbic acid, tartaric acid, citric acid. glucose and a cyclodextrin, etc., or mixtures, for example. When aqueous solutions of aryl hydrazides containing these stabilizers/antioxidants are prepared, the solution will have a shelf life of up to 30 days compared to 1-3 hours of solutions without the stabilizer/antioxidant. The stabilized aryl hydrazide is useful in photographic silver halide emulsions, etc.

Abstract: An ultra-high contrast negative type silver halide photographic material is disclosed, wherein at least one hydrazine derivative of formula (I) and at least one compound of formula (IV) are contained in a silver halide emulsion layer or another hydrophilic collide layer of the photographic material: ##STR1## wherein A.sub.1 and A.sub.2 both represent hydrogen atoms, or one represents a hydrogen atom and the other represents a sulfinic acid residual group or an acyl group, R represents an aliphatic group, an aromatic group or a heterocyclic group, and X represents a group as indicated by formulae (II) and (III) ##STR2## wherein X.sub.1 and X.sub.2 each represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, and X.sub.1 and X.sub.2 may be joined together to form a ring;--O--X.sub.3 (III)wherein X.sub.3 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group; andY.sub.0 [(A.sub.0).sub.n B].sub.m (IV)wherein Y.sub.

Abstract: A silver halide photographic material which contains (a) at least one redox compound capable of releasing a development inhibitor by oxidation and (b) at least one compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents an aliphatic group, an aromatic group, or a heterocyclyl group; L.sub.1 represents a divalent organic group; X.sub.1 represents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclyl group; and Y.sub.1 represents --O--, --SO.sub.2 NH-- or ##STR2## where Y.sub.

Abstract: A silver halide photographic material is disclosed, which has at least one compound represented general formula (1): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; both L and Time represent a divalent organic group; t represents 0 or 1; PUG represents a photographically useful group; Y represents --SO.sub.2 --, --Y'--SO.sub.2 --, or ##STR2## and Y' represents --O--, --NH--, or ##STR3## The material has a broad exposure latitude in line image-taking work and has a high resolving power in the work. It can form an ultrahard image having a high gamma value of 10 or more. The material may excellently reproduce a line original to form an ultrahard image having a high background density. It also has a broad exposure latitude in halftone dot image-taking work and can form a halftone dot image having ultrahigh contrast with high image quality.

Abstract: A silver halide photographic material composed of a support having thereon at least one light-sensitive silver halide emulsion layer, at least one layer of the material containing a compound represented by formula (I): ##STR1## wherein X represents hydrogen or a group capable of providing hydrogen upon hydrolysis; Time represents a divalent linking group; t is 0 or 1; PUG represents a photographically useful group; V represents a carbonyl group, a sulfonyl group, a sulfoxy group, an iminomethylene group, ##STR2## wherein W represents an electrophilic group, or V represents ##STR3## wherein R.sub.0 represents an alkoxy group or an aryloxy group; and R represents hydrogen, an aliphatic group, an aromatic group or ##STR4## wherein PUG, Time, t, and W are as defined above. The redox compound is capable of releasing a photographically useful reagent using any conventional developing agent, has excellent storage stability, and provides rapid release of the photographically useful reagent.

Abstract: A silver halide photographic light-sensitive material suitable for photomechanical process is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and the emulsion layer or a layer adjacent to the emulsion layer contains a compound represented by formula 1, 2 or 3 and a compound represented by formula 4 or 5. ##STR1## The light-sensitive material give extreme high contrast images by processing usung a stable developer and is inhibited from producing pepper fog.

Abstract: Silver halide photographic elements which are capable of high contrast development, when processed in the presence of a hydrazine compound that functions as a nucleating agent, contain both an amino compound which functions as an incorporated booster and a ballasted hydrophobic isothiourea compound comprising a ballasting group, that is attached to the sulfur atom, which serves to restrict the mobility of the compound and thereby aid in retaining it in the photographic element during development. The ballasted hydrophobic isothiourea compound is highly effective in reducing pepper fog and also serves to restrain image spread.

Abstract: The silver halide photographic material capable of providing very high contrast negative images is disclosed, which has at least one silver halide photographic emulsion layer on a support, wherein the silver halide photographic emulsion layer or another hydrophilic colloid layer provided on the support contains a nucleating agent represented by formula (Ia), (Ib) or (Ic): ##STR1## wherein R.sub.11, R.sub.12, R.sub.21, R.sub.31, Y.sub.11, Y.sub.21, A.sub.11, A.sub.12 and G.sub.11 are defined in the specification.

Abstract: A silver halide photographic material which has at least one photosensitive silver halide emulsion layer containing a hydrazine derivative, and in which said emulsion layer and/or a hydrophilic colloid layer which is different from said emulsion layer contains a redox compound which release a development inhibitor when it is oxidized and an organic compound which is a melting-pointlowering agent which is essentially insoluble in water and which has the effect of lowering the melting point of said redox compound when the former has been mixed with the latter.

Abstract: A silver halide photographic material composed of a support having thereon at least one silver halide photosensitive emulsion layer, at least one layer of the material containing a blocked photographic reagent precursor represented by formula (I): ##STR1## wherein X.sub.1 represents a divalent linking group containing a hetero atom bonded to the carbon atom, provided that X.sub.1 is linked to the carbon atom by a group other than ##STR2## PUG represents a photographically useful group containing a hetero atom bonded to X.sub.1 ; W represents .dbd.N-- or ##STR3## Y.sub.1 represents hydrogen or a group capable of being substituted; Z represents an atomic group necessary for forming a heterocyclic ring, provided that when W represents a ##STR4## the group adjacent to W in the heterocyclic ring is a group other than ##STR5## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.

Abstract: A direct positive silver halide photographic material is disclosed, comprising a support having thereon at least one internal latent image silver halide emulsion layer which has not been prefogged and another hydrophilic colloid layer wherein the grains in the internal latent image silver halide emulsion is formed in the presence of an iron complex compound. The direct positive silver halide photographic material is developed and then direct positive images may be obtained with this material, which feature a high D.sub.max and a low D.sub.min. The disclosed material has a broad range of applications, including as a COM film.

Abstract: A process for preparing a direct positive photosensitive material comprising providing on a support at least one silver halide light-sensitive emulsion layer containing the combination of (a) non-prefogged internal latent image silver halide grains; (b) a binder; (c) at least one compound represented by formulae (I), (II), or (III); and at least one compound represented by formula (IV):R--SO.sub.2 S--M (I)R--SO.sub.2 S--R.sup.1 (II)R--SO.sub.2 S--L.sub.m --S.O.sub.2 S--R.sup.2 (III)wherein R, R.sup.1 and R.sup.2 each represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group; M represents a cation; L represents a divalent linking group; and m is 0 or 1; andR.sup.3 --SO.sub.2 --M.sup.1 (IV)wherein R.sup.3 represents an aliphatic group, an aromatic group or a heterocyclic group; and M.sup.1 represents a cation. The material provides a direct positive image with high Dmax, low Dmin and high contrast.

Abstract: A novel direct positive photosensitive material is provided comprising a support having therein at least one photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged, wherein the photographic emulsion layer comprises:(1) at least one of compounds represented by the general formulae [I], [II] and [III]; and(2) at least one of compounds represented by the general formulae [IV], [V] and [VI]:R--SO.sub.2 S--M [I]R--SO.sub.2 S--R.sup.1 [II]R--SO.sub.2 S--Lm--S.O.sub.2 S--R.sup.2 [III]wherein R, R.sup.1 and R.sup.2 may be the same or different and each represents an aliphatic group, aromatic group or heterocyclic group; M represents a cation; L represents a divalent connecting group; and m represents an integer 0 or 1;M'.sub.2 SO.sub.3 [IV]M'HSO.sub.3 [V]M'.sub.2 S.sub.2 O.sub.5 [VI]wherein M' represents a hydrogen atom or cation.

Abstract: Photographic elements and emulsions are described which are capable of providing high contrast images. The elements and emulsions comprise negative working silver halide and contrast enhancing arylhydrazide nucleating agents. A process for utilization of the elements and emulsions is also described.

Abstract: A silver halide photographic material comprising one or more silver halide emulsion layers and hydrophilic colloid layers, wherein at least one of the layers contains an acylhydrazine compound as described below. The instant photographic materials have high contrast negative-gradation or positive-gradation characteristics, high maximum image density, excellent reversal characteristics and long-term storage stability.

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 silver halide photographic material comprising a support having provided thereon at least two hydrophilic colloid layers, wherein at least one of the hydrophilic layers comprises water or a hydrophilic colloid and a compound represented by formula (I) dispersed therein using water or a water-soluble organic solvent:PWR-(Time).sub.t -PUG (I)wherein PWR represents a group capable of releasing (Time).sub.t -PUG upon reduction;Time represents a group capable of releasing the PUG residual group by the successive reaction, after being released as (Time).sub.t -PUG;t represents 0 or 1;PUG represents a photographically useful group; and at least one water-soluble group exists in one molecule of the compound.

Abstract: A method for processing a silver halide color photographic material including the step of developing the silver halide color photographic material with a color developing solution containing at least one aromatic primary amine developing agent and at least one hydrazide represented by the following formula (I) or (II)R.sup.1 --X.sup.1 --NHNH--R.sup.2 (I)in whichX.sup.1 represents --CO--, --SO.sub.2 -- or ##STR1## R.sup.1 represents a hydroxyl group, a hydroxyamino group, carbamoyl group, a hydrazinocarbonyl group, an amino group, or a hydrazino group; and R.sup.2 represents a hydrogen atom, an alkyl group, or an aryl group; provided that the R.sup.1 or R.sup.2 groups of at least two of the hydrazide groups may be linked to form a dimer or higher polymer of the hydrazide.R.sup.3 --X.sup.2 --NHNH--R.sup.4 (II)in whichX.sup.2 represents --CO-- or --SO.sub.2 --; R.sup.3 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, or an aryloxy group; and R.sup.

Abstract: A silver halide photographic material which comprises a support having thereon at least one hydrophilic colloid layer being a silver halide photographic emulsion layer, and at least one hydrophilic colloid layer containing a compound represented by the following general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 both represent a hydrogen atom, or one of A.sub.1 and A.sub.2 is a hydrogen atom and the other is a sulfonyl group or an acyl group; R.sub.1 represents an aliphatic group or an aromatic group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, a group of ##STR2## wherein R.sub.2 is an alkoxy group or an aryloxy group, a group of ##STR3## or an iminomethylene group; X.sub.1 represents a residue of a nitrogen-containing heterocyclic ring; and at least one of R.sub.1 and X.sub.1 having an adsorption-accelerating group on silver halide.

Abstract: Silver halide photographic elements which are capable of high contrast development having incorporated therein, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: ##STR1## where each R is a monovalent group comprised of at least three repeating ethyleneoxy units, n is 1 to 3, and R.sup.1 is hydrogen or a blocking group.

Abstract: A method for forming a direct positive image having a high Dmax and a low Dmin, which comprises image-wise exposing a photographic light-sensitive material having on a support at least one photographic emulsion layer containing unprefogged internal latent image-type silver halide grains and developing the photographic light-sensitive material after or while fogging to form direct positive image, wherein the aforesaid development is performed in the existence of at least one compound selected from the group consisting of compounds represented by formula (I), (II), (III), (IV), (V) or (VI), acid salts of compounds represented by formula (I) to (IV) provided substituents thereof contain an amino group, and acid salts of compound represented by formula (V) or (VI); ##STR1## wherein symbols are defined as in claim 1.

Abstract: A silver halide photographic material, which comprises a support having provided thereon at least one light-sensitive silver halide emulsion layer, the silver halide emulsion layer or at least one other hydrophilic colloid layer of the material containing at least one heterocyclic quaternary ammonium salt compound represented by the following general formula (I): ##STR1## wherein Z represents non-metallic atoms necessary for forming a 5- or 6-membered heterocyclic ring which may be substituted with a substituted group; R.sup.1 represents an aliphatic group; R.sup.2 represents a hydrogen atom, an aliphatic group, or an aromatic group; Y represents a charge-balancing counter ion; and n is 0 or 1; provided that at least one of R.sup.1, R.sup.2, and Z has an acyl group, a hydrazine group, or a hydrazone group, or R.sup.1 and R.sup.2 form a 6-membered dihydropyridinium skeleton, and at least one of R.sup.1, R.sup.2, and Z includes the group -X-L-.sub.

Abstract: A method for forming a direct positive image by the steps of:(a) imagewise exposing a photosensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer containing non-prefogged silver halide grains capable of forming an internal latent image; at least one of the light-sensitive emulsion layer or the other hydrophilic colloidal layer of the photosensitive material containing the following compound (a): ##STR1## (b) developing the exposed material in the presence of a developing agent and at least one nucleating agent; and(c) at least one of fixing and bleaching said developed photosensitive material to form a positive image.When used for making computer output images, the method according to the present invention provides rapid and stable formation of direct positive images with a high Dmax and a low Dmin, and prevents re-reversal negative formation during high illuminance exposure.

Abstract: A light-sensitive material which comprises a light-sensitive layer and a support is disclosed. The light-sensitive layer contains silver halid grains, at least two hydrazine derivatives and a polymerizable compounds. One hydrazine derivative has the following formula [I]: ##STR1## in which one of R.sup.1 and R.sup.2 is hydrogen, and the other is hydrogen, an alkylsulfonyl group, an arylsulfonyl group or an acyl group; R.sup.3 is an aliphatic group, an aromatic group or a heterocyclic group; R.sup.4 is hydrogen, an alkyl group, an aralkyl group, an aryl group, an alkoxy group, an aryloxy group, amino or carbamoyl; at least one hydrogen atom contained in R.sup.3 or R.sup.4 is replaced with a group capable of being adsorbed on silver halide grains; G is carbonyl, sulfonyl, sulfinyl, ##STR2## (R.sup.5 has the same meanings as for R.sup.4); and each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and G may have one or more substituent groups.

Abstract: Disclosed are direct positive photographic photosensitive materials which have at least one internal latent image core/shell type silver halide emulsion layer, which has not been pre-fogged, on a support wherein the silver halide molar ratio of the core and shell of the emulsion is not more than 1/5, and wherein at least one type of compound which can be represented by the formula (N-I) indicated below is included in the photosensitive material. ##STR1## In this formula, Z represents a non-metal atomic group which is required to form a 5- or 6-membered heterocyclic ring, and Z may be substituted with substituents. R.sup.1 is an aliphatic group, and R.sup.2 is a hydrogen atom, an aliphatic group or an aromatic group. R.sup.1 and R.sup.2 may be substituted with substituents. Furthermore, R.sup.2 may be joined to the heterocyclic ring which is completed by and form a ring. However, at least one of the groups represented by R.sup.1, R.sup.

Abstract: A silver halide photographic material having at least one hydrophilic colloid layer, wherein at least one hydrophilic colloid layer is a silver halide photographic emulsion layer, and at least one hydrophilic colloid layer contains a compound represented by the general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 both represent hydrogen atoms, or one of them represents a hydrogen atom and the other represents a sulfonyl group or ##STR2## (wherein R.sub.0 represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group or an aryloxy group, and l.sub.1 represents 1 or 2); G represents ##STR3## (wherein m.sub.1 represents 1 or 2), --SO.sub.2 --, --SO--, ##STR4## (wherein R.sub.

Abstract: Photographic compound (A) capable of releasing a photographically useful group is represented by the formula: SOL-CAR-LINK-PUG wherein SOL is a water-solubilizing group; CAR is a carrier moiety that, upon reaction with oxidized developing agent, is capable of releasing LINK-PUG and capable of forming a compound that is washed out of the photographic element during photographic processing; LINK-PUG is in turn capable of releasing a photographically useful group (PUG) during photographic processing and LINK-PUG is represented by the formula: ##STR1## wherein X, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and PUG are as defined in the application. The photographic compound (A) enables formation of easily removable compounds in photographic elements and processes that provide images having improved acutance.

Abstract: A direct positive color photosensitive material comprising an internal latent image silver halide emulsion layer which has not been prefogged, a color image-forming magenta coupler of formula (I) and a nucleation accelerator of formulae (II) and/or (III): ##STR1## wherein Za and Zb represent a ##STR2## group, R.sup.1 and R.sup.2 represent a hydrogen atom or a substituent group, X represents a hydrogen atom or a group which can be eliminated by a coupling reaction, and R.sup.1, R.sup.

Abstract: Disclosed is a direct positive photographic material having an improved time-dependent storage stability. The material comprises a support having thereon at least one photographic emulsion layer containing previously non-fogged internal latent image type silver halide grains wherein the photographic emulsion layer contains at least one compound of formula (I): ##STR1## where R.sup.11 is an aryl group, R.sup.12 to R.sup.15 each are a hydrogen atom, or an aliphatic or aromatic group, and R.sup.11 to F.sup.15 may have substituent(s) and may form ring(s).