Abstract: There is disclosed a silver halide color photographic light-sensitive material that contains, in photographic constitutional layers on a support, a hydrazine-series reducing agent for color formation, and a phenol-series magenta coupler having an acylamino group at the 5-position, and/or a naphthol-series cyan coupler having an amido group at the 5-position. The light-sensitive material makes low-replenishment and low-discharge processing possible, and exhibits good color reproducibility and good color-forming property.

Abstract: A new fogging photographic processing solution for a reversal process comprises a compound (I) and a bi-nucleophilic agent. Compound (I) corresponds to the following formula: ##STR1## wherein A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, R.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group substituted or unsubstituted. A process of producing a positive image by imagewise exposure of a reversal silver halide material comprises contacting the material with the above fogging solution or by imagewise exposure of such a material containing a compound (I) and contacting the material with a solution comprising a bi-nucleophilic agent.

Abstract: A silver halide color photographic material is disclosed, wherein it comprises a support having thereon one or more constituent layers including at least one silver halide emulsion layer, wherein at least one hydrophilic colloid layer of said constituent layers contains a coupler represented by the following formula (M) or formula (I) and at least one hydrophilic colloid layer of said constituent layers contains a compound represented by the following formula (H): ##STR1##

Abstract: A photographic light-sensitive silver halide material is provided for making negative lithographic images or direct-positive images, said material comprising a support, at least one internal latent image-type silver halide emulsion layer (in the case of direct-positive materials) or surface latent image-type silver halide emulsion layer (in the case of lithographic materials) and development-nucleating amounts of a compound or a precursor thereof, said compound having at least one quaternary heterocyclic ring system comprising at least three rings including a tetrahydropyridinium ring wherein carbon-nitrogen and carbon-carbon double bonds are also part of an aromatic ring being one of said three rings and wherein said double bonds and nitrogen atom in said tetrahydropyridinium ring are incorporated into annelated conjugated ring systems. Developing said photographic material after exposure in an alkaline surface developer rapidly converts said precursor into a ring system as defined hereinbefore.

Abstract: A silver halide photographic material comprising a hydrazine compound is described, wherein the hydrazine compound is selected from (a) a hydrazide compound having an acyl group substituted with an anionic group and with an electron-attracting group and (b) a hydrazide compound having an acyl group substituted with an electron-attracting group and with a nonionic group which forms an intramolecular hydrogen bond with a hydrogen atom in hydrazide compound.

Abstract: A silver halide color reversal photographic light-sensitive material processing method which forms a color reversal image by performing first black-and-white development, fogging process, color reversal development, and desilvering process by using a color reversal developer with a composition containing a non-dye-forming competing coupler, a silver halide fogging agent, and a carboxybenzenesulfonic acid compound and not containing hydroxylamine or its derivative.

Abstract: The present invention provides a method for making direct-positive photographic images comprising the steps of image-wise exposing a photographic light-sensitive silver halide material comprising a support and a layer of an internal latent image-type silver halide emulsion the pAg of which has been adjusted to a value of at least 8.5 before coating, and developing said exposed photographic silver halide material in a surface developer in the presence of at least one development nucleator which is not able to react with but which is able to adsorb weakly on the surface of the silver halide emulsion crystals prior to development, but which contains a group protected against reaction with silver halide and which is transformed during development in a nucleating derivative with an enhanced reactivity for the silver halide crystals. Photographic materials comprising these novel development nucleators are also described.

Abstract: The present invention relates to a method for making direct-positive photographic images by developing light-sensitive materials in the presence of development nucleators which do not cause loss of sensitivity during exposure or unevenness of development. More specifically the invention relates to the formation of direct-positive images having a high maximum density and high exposure latitude and to photographic materials for use in said formation, which is accomplished by a method for making direct-positive images comprising:image-wise exposing a photographic light-sensitive silver halide material comprising a support and a layer of an internal latent image-type silver halide emulsion, the pAg of which has been adjusted to a pAg-value between 9.0 and 10.5 inclusive before coating, anddeveloping said exposed photographic silver halide material in a surface developer in the presence of a development nucleator with a group promoting adsorption to silver halide.

Abstract: The inclusion of isothiouronium functionality onto hydrazide derivatives results in the formation of nucleating agents for lithographic films that produce high contrast and speed with excellent dot quality as required for halftone applications. The level of performance of the nucleators of the invention is sufficiently high that the need to incorporate amine boosters in the lithographic film elements or developers is not required. The novel nucleators have the formula ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.10 alkyl, substituted or unsubstituted carbamoyl, or alkoxy or aryloxy carbonyl; Y is substituted or unsubstituted divalent aryl, and Q is an isothiouronium salt moiety.

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: A black and white direct positive image forming process is disclosed. The process comprises imagewise exposing to light a silver halide light sensitive material and developing the material with a black and white developing solution. The light-sensitive material comprises a non-pre-fogged internal latent image type silver halide emulsion layer provided on a support. The material further contains a quaternary salt nucleating agent and a nucleating accelerator. In the present invention, the black and white developing solution contains an imidazole compound and a benzotriazole compound. The amount of the benzotriazole compound is preferably in the range of 0.1 to 10 wt.% of the amount of the imidazole compound. The black and white direct positive image is preferably formed on a computer output microfilm (COM).

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: 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: Method for the production of direct-positive images by image-wise exposing a light-sensitive silver halide material comprising a support and an internal latent image-type silver halide emulsion layer and developing said exposed material in the presence of at least one development nucleator and density-increasing amounts of a compound chosen from the class consisting of formic acid, oxalic acid, glyoxylic acid, or salts of these and/or of a compound chosen from the class consisting of polyethylene glycols, with a hydroquinone-type developing solution having a pH not higher than 12.0 and comprising less than 25 g per liter of a hydroquinone and 5 to 100 g per liter of at least one alkanolamine.

Abstract: A method for producing color images comprising developing a negative silver halide color photographic materials and an internal latent-image type direct positive silver halide color photogaphic material, with the same developer having a pH of 9.0 to 11.5, said direct positive photographic material containing at least one compound represented by formula (N-I) as nucleating agent and at least one compound represented by (I) or (II) as magenta coupler, thereby ensuring high color reproducibility to both photographic materials: ##STR1## wherein the symbols and substituents of said formulae are as defined in the specification.

Abstract: Poly(ethylene glycol)-N-succinimide carbonate and its preparation are disclosed. Polyethylene glycol (PEG) is converted into its N-succinimide carbonate derivative. This form of the polymer reacts readily with amino groups of proteins in aqueous buffers. The modified proteins have PEG-chains grafted onto the polypeptide backbone by means of stable, hydrolysis-resistant urethane (carbamate) linkages.

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 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: 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 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 direct positive photographic material comprising a support having provided thereon one or more hydrophilic colloid containing layers, wherein at least one of said hydrophilic colloid containing layers is an internal latent image type silver halide emulsion which has not been previously fogged and at least one of said emulsion layer or other hydrophilic colloid containing layer contains a colloidal metal or a colloidal water-insoluble metallic sulfide, selenide or telluride, and a method for forming a direct positive from the direct positive photographic material in which a light-sensitive material contains at least two layers containing colloidal silver.

Abstract: A method for forming a direct positive image composed of the step of developing with a surface developer an imagewise exposed photosensitive material compose of support having thereon at least one photosensitive emulsion layer containing unprefogged silver halide grains capable of forming an internal latent image; the at least the photosensitive emulsion layer composed of hexagonal tabular silver halide grains in an amount of at least 30 wt %, based on the total silver amount of silver halide grains therein; the hexagonal tabular grains having two parallel hexagonal faces, the ratio of the longest side to the shortest side of the hexagon being at most 2; the aspect ratio of the hexagonal tabular grains being from 2 to 8; and the hexagonal tabular grains having a monodisperse size distribution. The method provides increases in processing speed, maximum density, and contrast in the toe portion, and an improvement in graininess, even when exhausted processing solutions are used.

Abstract: A direct positive image forming method comprising development processing an imagewise exposed direct positive photographic light-sensitive material which comprises a support having thereon at least one layer containing internal latent image type silver halide grains not having been previously fogged after fogging treatment or while fogging treatment, wherein the fogging treatment is conducted in the presence of 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 represents a hydrogen atom and the other represents a sulfonyl group or an acyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; L.sub.1 represents a divalent linkage group; X.sub.1 represents --O-- or ##STR3## wherein R.sub.4 represents a hydrogen atom, an alkyl group or an aryl group); Y.sub.1 represents ##STR4## R.sub.1 and R.sub.

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 an alkyl group, n is 1 to 3, X is an anion, m is 1 to 6, Y is a divalent aromatic radical, and R.sup.1 is hydrogen or a blocking group.

Abstract: A silver halide photographic light-sensitive material comprising a reflective support having a transmission density of not more than 0.8, having thereon, a photographic component layer comprising a silver halide emulsion layer and a layer including at least one anti-halation layer formed closer to said support than said silver halide emulsion layer is disclosed. In the photographic material, degradation of image sharpness due to use of a reflective support having low transmission density is prevented.

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 R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, and R.sup.1 is hydrogen or a blocking group.

Abstract: A direct positive photographic light-sensitive material is disclosed which comprises at least two direct positive emulsion layers having the same color sensitivity, wherein at least one hydrophilic colloid layer is provided between the direct positive emulsion layers. A direct positive photographic light-sensitive material having a high graininess, a soft tone, and a high picture quality can be obtained.

Abstract: A direct positive image forming method comprising development processing an imagewise exposed photographic light-sensitive material comprising a support having thereon at least on photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged in the presence of a nucleating agent, wherein the nucleating agent comprises at least two kinds of nucleating agents and a ratio of nucleating rates thereof is at least 2.0.In accordance with the method of the present invention, images having both a low minimum density and an extremely high maximum density can be rapidly and stably obtained using a small amount of nucleating agents.

Abstract: A method for forming a direct positive image comprising the steps of:(a) imagewise exposing a photographic light-sensitive material composed of a support having thereon at least one unprefogged internal latent image type silver halide light-sensitive emulsion layer; and(b) developing the exposed photographic light-sensitive material to form a direct positive image in the presence of at least one nucleating agent represented by formula (N-I); ##STR1## wherein Z.sup.1 represents nonmetal atomic group necessary for forming a 5-membered or 6-membered heterocyclic ring, a 5-membered or 6-membered heterocyclic ring fused with an aromatic ring, or a 5-membered or 6-member heterocyclic ring fused with another heterocyclic ring; R.sup.1 represents an aliphatic group; X represents ##STR2## Q represents a nonmetallic atomic group necessary for forming a 4-membered to 12-membered nonaromatic hydrocarbon ring or a 4-membered to 12-membered nonaromatic heterocyclic ring; provided that at least one of R.sup.1, Z.sup.

Abstract: A method for the formation of direct positive color images wherein after image-wise exposure of a direct positive color photosensitive material which comprises at least one internal latent image type silver halide emulsion layer which has not been pre-fogged and color image forming couplers on a support, the material is subjected to development after and/or during a fogging process, the development process being carried out using a development bath which contains at least one N-hydroxylalkyl substituted p-phenylenediamine derivative in the presence of at least one compound of general formula [I] and/or [II] as indicated below: ##STR1## wherein Q represents the group of atoms required to form a five- or six-membered heterocyclic ring, which heterocyclic ring may be condensed with a carbon aromatic ring or a heterocyclic aromatic ring,Y represents a divalent linking group consisting of at least one atom selected from the group consisting of, carbon atom, nitrogen atom, oxygen atom, sulfur atom, and R represents

Abstract: A process for the formation of direct positive images comprising (1) imagewise exposing to light, a light-sensitive material comprising a photographic emulsion layer containing unfogged internal latent image type silver halide particles on at least one support, and (2) developing the light-sensitive material in the presence of a nucleating agent and at least one nucleation accelerator of general formula (I):A--(Y).sub.n R].sub.m (I)wherein A represents a group which is adsorbed by a silver halide; Y represents a divalent linkage group consisting of atoms or atomic groups selected from the group consisting of a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom, and a sulfur atom; R represents an organic group containing at least one of a thioether group, an amino group, an ammonium group, an ether group, and a heterocyclic group; n represents an integer of 0 or 1; and m represents an integer of 1 or 2 to form direct positive images.

Abstract: The present invention relates to a direct positive silver halide photosensitive material and a method for forming a direct positive image. By the use of a novel nucleating agent having a specific structural formula, the present invention provides a direct positive silver halide photosensitive material with an increased Dmax value and a decreased Dmin value, as compared with the use of the conventional nucleating agents, even if a small amount of the novel nucleating agent is used, and does not substantially reduce the Dmax value, even if the photosensitive material is kept in a high-humidity state for a long time before exposure.

Abstract: The invention provides (1) direct positive photographic photosensitive materials in which at least one type of FR compound which releases fogging agent or development accelerator or a precursor thereof in accordance with the amount of silver developed when the silver halide is being developed is included in a direct positive photographic material comprising at least one layer of non-pre-fogged internal latent image type silver halide emulsion on a support, and (2) a method of forming direct positive images of which the distinguishing features are that in a method for the formation of direct positive images in which a direct positive photographic photosensitive material comprising at least one layer of non-pre-fogged internal latent image forming silver halide emulsion on a support is processed, after image exposure, in a surface developer, at least one type of FR compound which releases fogging agent or development accelerator or precursors thereof is included in the said photographic mateiral, and that the s

Abstract: A process for forming a direct positive color image is disclosed, the process comprising imagewise exposing a photosensitive material containing at least one emulsion layer of silver halide of internal latent image type, which has not been preliminarily fogged, and a color image-forming coupler; developing said material using a surface developing solution containing an aromatic primary amine color developing agent in the presence of a nucleating agent and/or in the condition that fogging exposure is carried out prior to the developing step or during the developing step; bleaching; and fixing, wherein said color coupler is a compound which is in itself substantially nondiffusible, and capable of forming or releasing a substantially nondiffusible dye upon oxidative coupling with said aromatic primary amine color developing agent and said development processing is carried out at a pH of 11.

Abstract: A direct positive color image forming method which comprises processing an imagewise exposed photographic light-sensitive material with a surface color developing solution containing an aromatic primary amine color developing agent, after fogging treatment and/or during fogging treatment, wherein the photographic light-sensitive material comprises a support having thereon at least one internal latent image type silver halide emulsion layer that has not been previously fogged, a color image forming coupler, colloidal silver, and at least one compound represented by general formula (II): ##STR1## wherein Z represents an atomic group necessary for completing a 5-membered or 6-membered nitrogen-containing heterocyclic ring; D and D', which may be the same or different, each individually represents an atomic group necessary for completing an acidic nucleus and D and D' may be bonded to each other to form a cyclic structure; R.sup.

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

Abstract: A method for forming a direct positive image by the steps of (a) imagewise exposing a light-sensitive material including a support having thereon at least one photographic emulsion layer containing a nonprefogged silver halide capable of forming an internal latent image and (b) developing the exposed material in the presence of a nucleating agent containing a combination of at least one quaternary heterocyclic compound and at least one hydrazine compound. The resulting direct positive has sufficiently high maximum density and low minimum density, and satisfactory stability over time.

Abstract: A silver halide photographic material which comprises a support having provided thereon at least one photosensitive silver halide photographic emulsion layer, wherein the emulsion layer or at least one of the other hydrophilic colloid layers contains at least one of alkynyl-substituted heterocyclic quaternary ammonium salts represented by the formula: ##STR1## wherein Z represents a group of non-metallic atoms required to form a 5- to 6-membered heterocyclic ring, R.sup.1 represents an aliphatic group, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom, an aliphatic group, or an aromatic group, at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Z has at least one substituent having an alkynyl group, Y represents a counter ion for the charge balance, and n is a number required for charge balance.

Abstract: A process for forming a direct-positive image by developing an imagewise exposed photosensitive material, having on a support at least one photographic emulsion layer containing nonprefogged silver halide grains capable of forming an internal latent image, in which development is carried out in the presence of a combination of a nucleating agent and at least one compound having at least one mercapto group selected from a tetrazaindene, a triazaindene, and a pentaazaindene. The hydrogen atom of which mercapto group may optionally be further substituted with an alkali metal atom or an ammonium group. The invention process provides rapid and consistent formation of direct-positive images having high maximum density and low minimum density.

Abstract: A positive image forming method is disclosed. Said method comprises in sequence the steps of subjecting to imagewise exposure a silver halide photographic material having a silver halide emulsion layer containing a non-prefogged internal image forming silver halide, increasing the surface sensitivity of said silver halide in the substantial absence of water and performing development.

Abstract: A process for forming direct positive color photographic image is disclosed whereby a color photographic material having on a support at least one previously unfogged internal latent image-type silver halide emulsion layer and at least color forming coupler is developed, after imagewise exposure, with a surface color developer containing an aromatic primary amine color developing agent while applying thereto a fogging treatment, with or without the presence of a nucleating agent, before or during the development step, and bleaching and fixing (or blixing) the color photographic material, whereinthe pH of the surface color developer is not higher than 11.2,the color image forming coupler is a compound which is substantially non-diffusible and forms and releases a dye causing oxidative coupling with the aromatic primary amine color developing agent,and the surface of the silver halide in the internal latent image-type silver halide has been gold-sensitized.

Abstract: A process for forming a direct positive image which comprises image-wise exposing a light-sensitive material comprising a support having provided thereon at least one internal latent image type direct positive silver halide photographic emulsion layer, subjecting the selecting material to whole surface exposure before or during developing process, and then developing the resulting material in the presence of a quaternary salt type nucleating agent or a hydrazine type nucleating agent.The process is very high in the latitude for changes of expose amount, developing time, developing solution components, process temperature and the like and makes it possible to progress the development is a short time even in a low pH developing solution.

Abstract: In a method for forming a direct positive color image which comprises image-wise exposing to light a light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer contaiing unfogged internal latent image type silver halide grains and a color image-forming coupler; developing the light-sensitive material with a surface developing solution containing an aromatic primary amine type color developing agent in the presence of a nucleating agent and/or fogging exposure; bleaching and fixing the resulting material to form the direct positive color image, the improvement is characterized in that the developing solution has a pH of 11.5 or less and does not substantially contain benzyl alcohol; the color coupler is a compound which forms or releases a substantially non-diffusive dye by oxidation coupling with a developing agent, and the internal latent image type silver halide grains have a particular core/shell structure.

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 radiation-sensitive composition including silver halide grains capable of forming an internal latent image and a nucleating agent is useful as a coating on a support to form a photographic element.

Abstract: Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azomethine group, whose methine group is substituted with a 5-amino-1,2,4-triazolyl group, and/or copper complex compounds thereof.Preferably said direct positive photographic elements are multi-layer elements comprising internal latent image type type silver halide emulsion layers sensitized to different regions of the visible light and associated with image-dye providing compounds (photographic color couplers).

Abstract: An internal latent image-type direct positive silver halide light-sensitive material is described, comprising a support having at least one photographic emulsion layer thereon, wherein said layer contains internal latent image-type direct positive silver halide grains, the surfaces of which are chemically sensitized, wherein a compound of the general formula (I) is added as a finish additive to the photographic emulsion layer or at least one hydrophilic colloid layer adjacent to the photographic emulsion layer.General Formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined as herein. The light-sensitive material exhibits a very satisfactory reversal performance and is greatly improved in stability over the course of time.

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: A method of processing a silver halide color reversal photographic light-sensitive material, in which the photographic light-sensitive material is developed, the method comprising a step of processing the photographic light-sensitive material in a reversal bath containing at least one anionic surface active agent. A method of treating a silver halide color reversal photographic light-sensitive material, in which the photographic light-sensitive material is developed, the method comprising a step of processing the photographic light-sensitive material in a reversal bath containing at least one nonionic surface active agent.