Abstract: A silver halide photographic emulsion comprising a hydrophilic colloid binder, negative-acting silver halide grains, a hydrazine, and a contrast-promoting amount of a compound selected from the group consisting of 3-indazolinones, 4(3H)-pyrimidones, urazoles, 2-pyrazolin-5-ones, and 3-pyrazolin-5-ones.

Abstract: The present invention provides a photographic material comprising on a support (i) photosensitive silver halide particles, (ii) substantially light insensitive silver salt particles having a speed at least a factor 10 less than said photosensitive silver halide particles under the same conditions of exposure and development of said photosensitive silver halide particles and (iii) a releasing compound capable of image-wise releasing under the conditions for image-wise development of said photosensitive silver halide to silver a chemical sensitizer, said chemical sensitizer rendering said substantially light insensitive silver salt particles developable. The present invention also provides a method for making an image therewith and a method for making a lithographic printing plate.

Abstract: A silver halide color photographic material which contains at least one pyrrolotriazole cyan coupler having two electron attracting groups and at least one non-color forming, nondiffusing compound.

Abstract: A silver halide photographic material is disclosed, which comprises (a) at least one light-sensitive silver halide emulsion layer containing a hydrazine derivative and (b) a hydrophilic colloid layer which is different from the light-sensitive silver halide emulsion layer and which contains a redox compound capable of releasing a development inhibitor as a result of oxidation.

Abstract: Novel compounds have been discovered that are particularly effective as nucleation accelerators or boosters when employed with hydrazide nucleators in the formulation of silver halide emulsions for lithographic film. The novel compounds contain bis ureido groups joined by an alkyleneoxy moiety or recurring alkyleneoxy moieties. The 2-nitrogen of each ureido group can carry groups comprising hydrogen, aryl, alkyl or dialkylaminoalkyl, alike or different.

Abstract: There is disclosed a silver halide light-sensitive material and a method for forming image using thereof, in which a high contrast negative image useful in a photographic plate making process can be obtained in a processing solution with a pH lower than 11.0. The silver halide light-sensitive material comprises a support having provided thereon at least one silver halide emulsion layer and containing a hydrazine derivative in the above emulsion layer and/or a layer adjacent thereto. At least one compound represented by the following Formula (I) or (II) is contained in the above emulsion layer and/or a layer adjacent thereto: ##STR1## wherein A represents an organic group necessary for completing a hereto ring; B and C each represents a group constituted of one or more members selected from the group consisting of an alkylene group, an arylene group, an alkenylene group, --SO.sub.2 --, --SO--, --O--, --S--, and --N(R.sub.5)--, where R.sub.5 represents an alkyl group, an aryl group, or a hydrogen atom; R.sub.

Abstract: Novel compounds have been discovered that are particularly effective as nucleation accelerators or boosters when employed with hydrazide nucleators in the formulation of silver halide emulsions for lithographic film. The novel compounds contain bis ureido groups joined by an alkyleneoxy moiety or recurring alkyleneoxy moieties. The 2-nitrogen of each ureido group can carry groups comprising hydrogen, aryl, alkyl or dialkylaminoalkyl, alike or different.

Abstract: A silver halide photographic photosensitive material comprises a compound represented by the following formula (I): ##STR1## The variables in this formula are defined in the specification. Also disclosed is a method for processing this photosensitive material with a developer which has a pH 9.0 to 11.0 and which contains 0.15 to 1.5 mol/liter or more of sulfite ion.

Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a support having thereon a silver halide emulsion layer, wherein the silver halide emulsion layer contains a hydrazine derivative, and at least one of the silver halide emulsion layer and another hydrophilic colloid layer provided on the emulsion layer-coated side of the support contains a latex comprising polymer particles stabilized with gelatin.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material comprises a light-sensitive silver halide emulsion layer and containing both of a latex stabilized by gelatin and a redox compound from which a development inhibitor is released when the redox is oxidized in the emulsion layer or other non-light-sensitive hydrophilic colloidal layer. The silver halide photographic light-sensitive material is suitable for graphic arts plate-making use and is excellent in Ming-Gothic type reproduction, screen-image enlarging and screen-image reduction aptitudes, white-on-color letter quality, paste-up trace prevention, easy handling and stability.

Abstract: The present invention relates to a direct positive photosensitive material comprising at least two kinds of core/shell-type internal latent image-type silver halide grains having different average grain sizes, the smaller grains being substantially constituted of cubic grains, or tetradecahedron grains mainly of the face (100). According to the present invention, a direct positive photosensitive material having a wide exposure latitude and an extremely improved storage stability can be obtained.

Abstract: A silver halide photographic light-sensitive material comprises a support having provided thereon at least one light-sensitive emulsion layer and at least one hydrophilic colloid layer containing a solid fine grain dispersion of a dye, wherein the light-sensitive material contains at least one solid fine grain dispersion of a dye represented by formula (I) and at least one solid fine grain dispersion of a dye represented by formula (II): ##STR1## where R.sub.1, R.sub.2, R.sub.21, R.sub.22, R.sub.23, R.sub.24, L.sub.1, L.sub.2, L.sub.3, L.sub.21, and n are as defined in the specification. The use of the dyes in the form of solid fine grain dispersions prevents transfer or migration of the dyes between hydrophilic colloid layers.

Abstract: A silver halide photographic light-sensitive material is disclosed, which comprises a support and provided thereon, a silver halide photographic emulsion layer and a protective layer in that order, wherein at least one layer of said emulsion layer and said protective layer contains a cyclodextrin compound and said emulsion layer contains a hydrazine derivative or a compound represented by the following formula (T): ##STR1##

Abstract: The present invention provides a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) as specified in the claims capable of image-wise releasing sulphide or a sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver. The present invention further provides a method for obtaining an image and a lithographic printing plate with said photographic material.

Abstract: A photosensitive photographic silver halide material comprising a support bearing a layer of a silver halide emulsion comprising at least 50% silver chloride which contains in or adjacent the emulsion layer a hydrazide nucleating agent and an amine booster, the combination of which is capable of providing high contrast images, which emulsion is sensitised with a dye of the general formula: ##STR1## wherein each of R.sup.1 and R.sup.2 are individually hydrogen, or halogen atom or an alkyl group of 1-4 carbon atoms, a sulfoalkyl, a trifluoromethyl, or cyano group, R.sup.3 is an alkyl or substituted alkyl group, R.sup.4 is a sulfoalkyl group, and R.sup.5 and R.sup.6 are individually an alkyl or substituted alkyl group, andwherein there is the necessary counter-ion.

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

Abstract: Disclosed is a photographic image forming method. A silver halide photographic material is processed with a developing solution having a pH of 9.6 to 11.0. The silver halide photographic material has at least one light-sensitive layer containing a chemically-sensitized silver halide emulsion comprising silver halide grains having a silver chloride content of at least 60 mol %. At least one of said at least one light-sensitive layer and a light-insensitive hydrophilic colloid layer contains a hydrazine compound represented by the formula (1):R.sup.1 --NHNH--G--R.sup.2 (1).The variables in the formula are defined in the specification.

Abstract: A silver halide photographic material which contains at least one compound represented by the following general formula (I) in at least one silver halide photographic emulsion layer or one hydrophilic colloid layer, whereby achieving high Dmax and low Dmin: ##STR1## wherein T, U, V, and W each represents CH or N; R.sup.1 represents a substituent group; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom or a substituent group, provided that at least one among the substituents of R.sup.2 to R.sup.6 represents a group to be eliminated in the form of R.sup.m --H (m=an integer from 2 to 6) under an alkaline condition; X represents a counter ion for adjusting the charge balance; n represents the number of counter ions necessary to adjust the charge balance; and further, any pair of adjacent groups among the substituents from R.sup.1 to R.sup.6 may combine with each other to form a ring.

Abstract: A silver halide color photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer formed on a support wherein the light-sensitive material contains a compound represented by the following general formula (I): ##STR1## wherein A is a coupler residual or an oxidation-reduction group, X.sub.1 is an oxygen atom or a sulfur atom, X.sub.2 is an oxygen atom, a sulfur atom or NX.sub.6 group, W is a carbon atom or a sulfur atom, X.sub.3, X.sub.4, X.sub.5 and X.sub.6 are each a hydrogen atom or an organic residual, any two of X.sub.3, X.sub.4 and X.sub.5 can be bivalent groups which form a ring, PUG is a photographically useful group capable of bonding at a hetero-atom and, in the formula (I), n.sub.1 is 1 if W is a carbon atom, and either 1 or 2 if W is a sulfur atom. If n.sub.1 is 2, two X.sub.1 can either be identical or different. On the other hand, n.sub.2 is either 1 or 2. If n.sub.2 is 2, two X.sub.3, two X.sub.4, and two x.sub.5 are either identical or different.

Abstract: A silver halide photographic material comprising a support having thereon a previously fogged silver halide emulsion layer and a light-sensitive silver halide emulsion layer comprising at least one silver halide, wherein at least one of said previously fogged silver halide emulsion layer and a hydrophilic colloid layer adjacent thereto contains at least one hydrazine nucleating agent and at least one of said light-sensitive silver halide emulsion layer and a hydrophilic colloid layer adjacent thereto contains at least one redox compound capable of releasing a development restrainer when oxidized, and wherein said nucleating agent and said redox compound are contained in different layers.

Abstract: The present invention provides a photographic material comprising on a support (i) photosensitive silver halide particles, (ii) substantially light insensitive silver salt particles having a speed at least a factor 10 less than said photosensitive silver halide particles under the same conditions of exposure and development of said photosensitive silver halide particles and (iii) a releasing compound capable of image-wise releasing under the conditions for image-wise development of said photosensitive silver halide to silver a chemical sensitizer, said chemical sensitizer rendering said substantially light insensitive silver salt particles developable. The present invention also provides a method for making an image therewith and a method for making a lithographic printing plate.

Abstract: A silver halide light-sensitive material containing a compound selected from compounds represented by formula (I) or (II): ##STR1## wherein L.sup.1 represents --O--, --S--, --SO--, --SO.sub.2 --, --N(R.sup.4)--, --CONR.sup.4 --, --NR.sup.4 CO--, --OCONR.sup.4 --, --NR.sup.4 CONR.sup.4 --, --SO.sub.2 NR.sup.4 --, --NR.sup.4 SO.sub.2 -- or --NR.sup.4 SO.sub.2 NR.sup.4 --, each of which is bonded to the pyridine ring at the right hand side thereof; L.sup.2, L.sup.3, and L.sup.4 each represent a divalent aliphatic group or a divalent aromatic group; G represents --CO--, --SO.sub.2 --, --SO--, --COCO--, a thiocarbonyl group, an iminomethylene group or --P(O)(G.sup.1 R.sup.4)--; G.sup.1 represents a single bond, --O-- or --NR.sup.4 --; R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2 represents a monovalent substituent; n.sup.1 represents 0 or an integer of from 1 to 4; R.sup.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein at least one of the silver halide emulsion layer and a hydrophilic colloid layer(s) adjacent thereto contains at least one hydrazine compound represented by the following general formula (I) and at least one compound selected from the group consisting of compounds represented by the following general formula (II) and (III): ##STR1## wherein R.sub.1 represents an aliphatic or aromatic group which has a substituent having a moiety of --O(CH.sub.2 CH.sub.2 O).sub.n --, --O--(CH.sub.2 CH(CH.sub.3)O).sub.n -- or --O--(CH.sub.2 CH(OH)CH.sub.2 O).sub.n -- (wherein n is an integer of not smaller than 3) as part of a substituent or having a moiety of a quaternary ammonium cation as part of a substituent group, G.sub.1 represents a bivalent bonding group consisting of at least one of --CO--, --COCO--, --CS--, --C(.dbd.NG.sub.2 R.sub.2)--, --SO--, --SO.sub.2 -- or --P(O)(G.sub.2 R.

Abstract: There is disclosed a method for preparing a direct reversal type silver halide light-sensitive emulsion which is used for a black-and-white light-sensitive material and has the improved photographic performances of a high sensitivity and a high contrast. The method comprises:A method for preparing a fogging type direct positive silver halide emulsion comprising the steps of:(a) forming an emulsion containing silver halide grains;(b) fogging surfaces of the grains with a reducing agent to form a silver nuclei; and then(c) performing at least one of an adjustment of pH of the emulsion to 4.5 or less and an adjustment of pAg of the emulsion to 8.1 or more.

Abstract: A silver halide photographic material, suitable for exposure using Helium/Neon laser or light-emitting diode, contains silver bromide grains capable of forming a surface-latent image, a binder, a dot quality-promoting amount of at least one compound of the Formula I, and an effective amount for sensitizing said grains in the red region of the spectrum only one optical sensitizer compound of the Formula II: ##STR1## wherein all the symbols are as defined in the specification.

Abstract: A high contrast photographic image is formed by development of a photographic material with an amine-free developer having a low pH value. The photographic material has at least one silver halide emulsion on a support. The silver halide emulsion in the emulsion layer contains an iridium salt and/or a rhodium salt and comprises a gold-sensitized and sulfur-sensitized silver chlorobromide emulsion or silver chloroiodobromide emulsion having a silver chloride content of 50 mol% or more and a silver iodide content of 5 mol% or less. The emulsion layer contains a hydrazine compound represented by formula (I): ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group, which contains a partial structure, --O(--CH.sub.2 CH.sub.2 O).sub.n --, --O(--CH.sub.2 CH(CH.sub.3)O).sub.n -- or --O(--CH.sub.2 CH(OH)CH.sub.2 O).sub.n --, wherein n is an integer of 3 or more, as a part of the R.sub.1 substituent, or contains a quaternary ammonium cation as a part of the R.sub.1 substituent; G.sub.

Abstract: A silver halide light-sensitive material containing a hydrazine compound represented by formula (I): ##STR1## wherein L.sup.1 represents a single bond, --O--, --S--, --NR.sup.6 --, --CO--, SO.sub.2 --, --P(O) (G.sup.2 R.sup.6)-- or a combination thereof; L.sup.2 represents --SO.sub.2 NR.sup.6 --, --NR.sup.6 SO.sub.2 NR.sup.6 --, --CONR.sup.6 --, --NR.sup.6 CONR.sup.6 -- or --G.sup.2 P(O) (G.sup.2 R.sup.6)NR.sup.6 --; G.sup.1 represents --CO--, --SO.sub.2 --, --SO--, --COCO--, a thiocarbonyl group, an iminomethylene group or --P(O) (G.sup.2 R.sup.6)--; G.sup.2 represents a single bond, --O-- or --NR.sup.6 --; R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2, R.sup.3, and R.sup.4 each represent a divalent aliphatic group or a divalent aromatic group; R.sup.5 represents a hydrogen atom, an aliphatic group, an aromatic group, an alkoxy group, an aryloxy group or an amino group; R.sup.6 represents a hydrogen atom, an aliphatic group or an aromatic group; m represents 0 or 1; and X.sup.

Abstract: A direct-positive image-forming photographic material comprises a supporting substrate bearing a light sensitive, nonprefogged silver halide photographic emulsion capable of forming an internal latent image and includes a water-insoluble nucleator. The nucleator is incorporated in the photographic material in the form of a solid particle dispersion to improve the storage stability of the photographic material. The development rate of the photographic material may be increased by use of a developer containing an activator for the nucleator.

Abstract: Disclosed is a silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, a hydrazine compound is contained in said silver emulsion layer or at least one of other layers, wherein said material contains at least one compound represented by Formula I or Formula II, ##STR1## wherein R.sub.1 and R.sub.2 each independently represent an alkyl group, an alkenyl group or an alkynyl group respectively; R.sub.1 and R.sub.2 may form a ring; R.sub.3 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; L.sub.1 represents a divalent linking group; X represents a --[S--L.sub.2 --Y--(L.sub.3)n]-- group or a [--(L.sub.3)n--Y--L.sub.2 --S--]-- group, L.sub.2 represents an alkylene group or an alkenylene group, Y represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, L.sub.3 represents ##STR2## wherein Z.sub.1, Z.sub.2 and Z.sub.

Abstract: A silver halide photographic material which comprises a compound represented by the following general formulae (Ia) or (Ib):R.sup.1 --L.sup.1 --R.sup.2 --L.sup.2 --R.sup.3 --NHNH--G.sup.1 --R.sup.4 (Ia)R.sup.6 --L.sup.3 --R.sup.2 --NHNH--G.sup.1 --R.sup.4 (Ib)wherein the terms are as defined in the specification. The photographic material is capable of producing ultrahigh contrast images and is useful in photomechanical processes. An advantage of the material in comparison to prior materials is that can be developed using a developer having a lower pH value.

Abstract: There is disclosed a silver halide photographic light-sensitive material containing a compound represented by the following formula. The photographic material provides sufficiently high contrast images using a stable developer having a low pH value. The photographic material also provides a direct-positive type photographic material improved in image quality and storage stability.

Abstract: A method for forming an image comprising the steps of: (a) imagewise exposing silver halide photographic materials; where said photographic material contains (1) a compound represented by formula (I) ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, or 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 one of A.sub.1 or A.sub.

Abstract: A method for forming an image is disclosed. The method comprises the step of developing an imagewise exposed silver halide photographic material which contains a redox compound, with a developer which contains a silver halide developing agent and at least 0.1 mol/l of a sulfite and has a pH of 9 to 12, wherein the redox compound contains a redox group which is a hydrazine derivative which is capable of releasing a development inhibitor as a result of oxidation with the oxidized developer, and wherein after said oxidation, at least a portion of the development inhibitor is released into a developer where it reacts with a developer component and changes into a compound having little inhibiting effect. A silver halide photographic material used in that method is also disclosed.

Abstract: A color photographic recording material is described which comprises a silver halide emulsion layer containing a coupler compound capable of releasing a development accelerator or fogging agent and which material also contains silver halide grains which are more developable than the grains in the silver halide emulsion layer.

Abstract: Disclosed is a novel silver halide photographic material which comprises at least one light-sensitive silver halide emulsion layer on a support. The light-sensitive layer or another hydrophilic colloidal layer contains a compound represented by the following general formula (1): ##STR1## wherein X represents a hydroxy, amino or sulfonamide group; A.sub.1 and A.sub.2 each represents a hydrogen atom, an alkylsulfonyl group, an arylsulfonyl group or an acyl group, with the proviso that at least one of A.sub.1 and A.sub.2 is a hydrogen atom; G.sub.1 represents --CO--, --COCO--, --CS--, --C(.dbd.NG.sub.2 R.sub.3)--, --SO--, --SO.sub.2 -- or --P(O)(G.sub.2 R.sub.3)--; G.sub.2 represents a mere bond, --O--, --S-- or --N(R.sub.3)--; R.sub.1 represents a hydrogen atom, an amino group, a sulfonamide group, a halogen atom, a hydroxyl group, an alkoxy group or an alkyl group; L represents a divalent linking group; n represents an integer 0 or 1; R.sub.

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 2-substituted-4-hydroxy-1,3,3a,7-tetraazaindene which functions to inhibit pepper fog.

Abstract: A photographic direct positive material is disclosed comprising a support and one or more radiation sensitive emulsion layers containing internal latent image-forming silver halide grains characterized in that at least one of said emulsion layers further contains a masked stabilizer corresponding to general formula (I): ##STR1## wherein Z represents a lower alkyl group, a nitro group or a halogen atom, n=0 to 4, and M represents a positive counterion.Preferred compounds are 1-(2-sulphonatobenzoyl)-5-methyl-benzotriazole, 1-(2-sulphonatobenzoyl)-6-methyl-benzotriazole or a mixture of both.The masked stabilizer is preferably incorporated in the emulsion layer(s). The material preferably further contains a nucleating agent. Improved direct positive sensitometric properties and wider exposure latitude before encountering rereversal are obtained.

Abstract: The present invention provides a method for image formation which is free from the problems such as uneven development and pepper fog and can give photographic characteristics of extremely high contrast negative tone using a stable developer and which comprises developing a silver halide photographic light-sensitive material in the presence of a compound represented by the following formula (I): ##STR1## wherein R.sub.1 represents an alkyl group of 1-8 carbon atoms or a cycloalkyl group having 4-8 carbon atoms in the ring, R.sub.2, R.sub.3 and R.sub.4 may be identical or different and 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.2 and R.sub.3 may link to each other to form a ring structure, and at least one hydroxy group is present in the substituents R.sub.2, R.sub.3 and R.sub.4.

Abstract: A novel group of fluoroacetylphenyl hydrazines useful in insuring rapid-access processing of lithographic film elements is described. These hydrazines not only will produce good dot quality under conditions of rapid-access processing, but can be used a lower pH than conventional, prior art elements and will produce lower fog.

Abstract: A silver halide photographic light sensitive material having high contrast photographic characteristics and excellent antistatic properties is provided by incorporating a hydrazine compound represented by formula 1 or 2 and a nucleation-promoting compound selected from the group consisting of amine compounds and quaternary onium salts; and by coating an electrically conductive layer on a support.

Abstract: A novel blocked photographically useful compound element and process are based on a new blocking group that comprises a beta-ketocarbonyl group that is part of a 5- to 7-member heterocyclic ring containing a hetero-atom not adjacent to the beta-ketocarbonyl group. Such a blocked photographically useful compound provides a photographic material and process enabling more rapid release of the photographically useful group upon processing.

Abstract: Room light handleable direct reversal silver bromide emulsions, with up to 70 mole percent chloride, have a broad Dmin window when from 1.times.10.sup.-6 to 1.times.10.sup.-4 mole per silver mole of a polybromo coordination complex of iridium is incorporated in the silver halide grains. The emulsions are stabilized against deterioration on keeping with mercapto compounds.

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 benzimidazolocarbocyanine sensitizing dye that provides enhanced photographic sensitivity yet leaves substantially no sensitizing dye stain after rapid access processing.

Abstract: A method for forming images having a contrast of greater than G 8, comprising the step of developing an imagewise exposed silver halide photographic material with a developing solution having a pH of 11.2 or less. The silver halide photographic material comprises a support having thereon a hydrophilic colloid layer containing a redox compound which releases a development inhibitor upon oxidation and at least one photosensitive silver halide emulsion layer containing a hydrazine derivative. The at least one photosensitive silver halide emulsion layer containing a hydrazine derivative is different from the hydrophilic colloid layer containing a redox compound.

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 thioether compound which functions to inhibit pepper fog and restrain image spread.

Abstract: A silver halide photographic material comprising a support, having thereon one or more hydrophilic colloid layers, wherein at least one of the hydrophilic colloid layers is a silver halide emulsion layer, and wherein the silver halide emulsion layer or another hydrophilic colloid layer contains a compound represented by general formula (I):Y--[(X).sub.n --A.sub.0 --B.sub.0 ].sub.m (I)wherein Y represents a group which is adsorbed on silver halide, X represents a divalent group comprising an atom or group of atoms selected from among a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, A.sub.0 represents a divalent linking group which has at least two alkyleneoxy units, B.sub.0 represents an amino group, an ammonium group or a nitrogen containing heterocyclic group, m represents 1, 2 or 3, and n represents 0 or 1, as well as a method for processing a silver halide photographic material in the presence of a compound according to general formula (I).

Abstract: A silver halide photographic light-sensitive material is disclosed, which is capable of forming an extremely high contrast image with high dot quality and is inhibited in formation of pepper spots. The light-sensitive material comprises a support, and provided thereon, a photographic layer including a silver halide emulsion layer, wherein the pH value of the surface of said photographic layer is 5.9 or more and said emulsion layer or a layer adjacent to said emulsion layer contains a specified hydrazine compound, and an amine compound or a quaternary onium compound.

Abstract: The improved silver halide photographic material contains a novel nucleating compound that is useful either as a contrast increasing agent in light-sensitive material for use in photochemical processes or as a foggant in direct positive light-sensitive materials.

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 thiourea compound which functions as a chemical sensitizer. Thiourea compounds effective for this purpose are substituted thioureas having one or two acyl substituents or having three alkyl substituents or having one aryl substituent and two alkyl substituents.

Abstract: A method of forming a direct positive color image by imagewise exposing a photographic material having at least one emulsion layer which contains previously non-fogged internal latent image-type silver halide grains, on a support, followed by color-developing the exposed material during or after fogging thereof, wherein the photographic material contains a color sensitizing dye and at least one compound or salt thereof which satisfies the condition-1 as defined in the specification. With the image formed by the method having an elevated maximum image density with a lowered minimum image density, and with the iamge-forming method displaying extremely excellent color reproducibility.