Abstract: A derivative of paraphenylenediamine, for use as a color developer, having a primary amino group available for oxidative coupling, and a carboxy group bound to the benzene ring to provide the compound with the required stability to enable the compound to be incorporated into a photographic film, the compound being non-diffusible during development of the photographic film in an alkaline processing solution.

Abstract: A light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.

Abstract: This application is concerned with dye developer diffusion transfer color processes and discloses the incorporation of certain 2-substituted benzimidazoles, e.g., 2-phenyl-benzimidazole, in a dye developer photosensitive element to provide improved temperature latitude.

Abstract: Oxazolinone-2 derivatives having a releasable mercapto group in their 5-position are provided as development-inhibitor-releasing thioether compounds for use in color photographic material having a high reactivity on chromogenic development of color photographic material, and are very easy to prepare.

Abstract: A color photographic material comprising at least one light-sensitive silver halide emulsion layer having preferably a non-diffusing color coupler associated to it and at least one non-lightsensitive binder layer containing a colloidal silver dispersion provides less contact fog and a better color reproduction if the non-lightsensitive binder layer containing the colloidal silver dispersion contains also a soluble iodide, particularly sodium, potassium or ammonium iodide. Alternatively the soluble iodide may also be contained in a non-lightsensitive binder layer adjacent that binder layer which contains the silver dispersion.

Abstract: Certain 4-hydroxypyrazoles are employed as silver halide developing agents which find particular utility in diffusion transfer photographic processes.

Abstract: A light-sensitive silver halide photographic material containing a new development inhibitor releasing compound. The said compound has no hydrogen atom at the carbon atom which is adjacent to the carbonyl group and capable of coupling to an oxidation product of a color developing agent on the development.

Abstract: Alkanes containing an intralinear sulfonyl group and a (dialkylamino)oxosulfonium group separated by -CH- are employed as silver halide solvents in photographic processes and compositions.

Abstract: Alkanes containing an intralinear sulfonyl group and an intralinear sulfinyl group separated by a single carbon substituted with at least one hydrogen atom are employed as silver halide solvents in photographic processes and compositions.

Abstract: A novel photographic imaging element which comprises a support, at least one photosensitive silver halide layer, and at least one layer of colorant (e.g., colloidal silver), bleachable with an oxidizing bleach in accordance with images formed in the silver halide layer. Images are formed with such elements by imagewise exposure of the photosensitive silver halide layer and conventional development of the image therein followed by imagewise bleaching the colorant layer with an oxidizing bleach to reduce the optical density in areas of the colorant layer to form an image thereon corresponding to the developed image in the silver halide layer. The combined images in the photosensitive silver halide layer and the imagewise bleached colorant layer form a composite, high quality image having high density and efficiency in the use of silver, providing a substantial reduction in silver halide coating weight over conventional, all-silver halide elements.

Abstract: A color photographic material having a silver halide emulsion layer and containing a thioether compound which is reactable on chromogenic development thereby releasing a diffusible substance which inhibits the development of the silver halide.The thioether compound is a homophthalimide containing a removable mercapto group containing moiety in the 4-position and its nitrogen in the 2-position atom being a tertiary nitrogen.

Abstract: In one embodiment, the present invention relates to novel heterocyclic compounds as represented in the following formula ##STR1## wherein R and R' each are hydrogen or alkyl, Y is .dbd.O or .dbd.NH and n is a positive integer from 1 to 7.In another embodiment, the present invention is directed to the use of the above-denoted class of heterocyclic compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.

Abstract: A silver halide photographic emulsion containing at least one sensitizing dye of the following general formula (I) and at least one sensitizing dye of general formulae (II) and/or (III), in an amount effective to achieve supersensitization: ##STR1## wherein V.sup.1 and V.sup.2, which may be the same or different, each represents a hydrogen atom, halogen atom, trifluoromethyl, cyano, carboxy, alkoxycarbonyl, aminosulfonyl or alkylsulfonyl; W.sup.1 and W.sup.2, which may be the same or different, each represents a hydrogen atom, halogen atom, alkyl, alkoxy, hydroxy, acyloxy or phenyl; R.sup.1 represents alkyl or substituted alkyl; R.sup.2 and R.sup.3, which may be the same or different, each represents alkyl or substituted alkyl, and at least one of R.sup.2 and R.sup.3 represents 1 or 0; substituted alkyl containing a carboxy or sulfo radical; R.sup.4 and R.sup.5, which may be the same or different, each has the same meanings as R.sup.1 ; X.sup.- represents an acid anion; and m represents ##STR2## wherein V.

Abstract: A compound having a 2- imidazoline nucleus is used a development accelerator.

Abstract: A radiation-sensitive composition is disclosed including silver halide grains capable of forming an internal latent image and an acylhydrazinophenylthiourea nucleating agent. This composition can be used as a coating on a support to form a photographic element.

Abstract: A rapid process in not more than 60 seconds of an imagewise exposed photographic light sensitive film, comprising developing or activating, stabilizing, fixing, and washing.

Abstract: A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.

Abstract: Silver halide supersensitized with a mixture of naphthoxazole and benzoxazole carbocyanine dyes.

Abstract: Direct-positive emulsions are described comprising incorporated developing agents wherein the developing agents are 1,4-dihydroxybenzene compounds of which at least one of the hydroxyl groups has been esterified to form a hydrolyzable aliphatic acyloxy group comprising a quaternary ammonium group.

Abstract: A method for dispersing organic compounds which are substantially insoluble in water and are used in photographic materials, such as chemical sensitizers (except spectral sensitizing dyes), antifoggants, antioxidants, ultraviolet absorbents, color couplers, coating aids, hardening agents, etc., effectively in a silver halide photosensitive emulsion comprising dissolving the organic compounds in an acid having a pKa of not over about 5, such as methanesulfonic acid, ethanesulfonic acid, etc., and adding the solution to the silver halide photosensitive emulsion directly or after dispersing in an aqueous solution.

Abstract: A thermally developable photosensitive material comprising a support having thereon in one or more layers, (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a compound capable of forming photosensitive silver halide, (c) a reducing agent, (d) a binder and (e) at least one compound represented by the following general formula (I), ##STR1## wherein R.sub.1 and R.sub.2 each is an alkyl group or an aralkyl group; and R.sub.3 is a hydrogen atom, an alkyl group, a chloroanilino group, a benzyloxy group, a 2-oxo-1-(N-phenylcarbamoyl)propyl group or a substituted phenyl group having one or more of a chlorine atom, an alkyl group, an amino group, an alkylamino group and a dialkylamino group as substituents; the following general formula (II), ##STR2## wherein R.sub.4 is a ##STR3## group, a ##STR4## group or a --NH(CH.sub.2).sub.n --NH-- group; and n is an integer of 1 to 5; or the following general formula (III), ##STR5## wherein R.sub.

Abstract: A heat developable light-sensitive material having reduced fog, increased whiteness, and stability to normal room illumination comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide upon reaction with the organic silver salt (a), and (c) as a reducing agent an s-triazine-2,4,6-(1H, 3H, 5H)-trione substituted with a phenol derivative (having a substituted group in at least one of the o-positions thereof with respect to the hydroxyl group) in at least one of the 1-, 3- or 5-positions.

Abstract: A spectrally sensitized silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye represented by the following general formula (I): ##STR1## wherein Z.sup.1 and Z.sup.2 each represents an atomic group necessary for completing a benzimidazole nucleus, an oxazole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus excepting that both of Z.sup.1 and Z.sup.2 do not simultaneously represent an atomic group necessary for completing an oxazole nucleus, a benzoxazole nucleus or a naphthoxazole nucleus; R.sup.1 and R.sup.2 each represents an aliphatic group which may be substituted and the carbon chain of which may be interrupted with an oxygen atom or a sulfur atom; R.sup.0 represents a hydrogen atom, an alkyl group or an aralkyl group; X.sub.(1).sup.

Abstract: A multilayer color photographic light-sensitive material comprising a support having thereon at least two silver halide emulsion layer units, each of which is sensitive to radiation of a substantially different wavelength region within the wavelength region of from about 220 nm to about 800 nm and contains a color-forming coupler capable of forming a dye on coupling with an oxidized primary aromatic amine developing agent, with at least one of the emulsion layer units containing an ICC coupler represented by the general formula (I) ##STR1## wherein Cp represents a coupler residue; L and M each represents a nitrogen atom or a methine group, V represents a monocyclic or dicyclic aromatic ring of the benzene series, and at least one of L and M represnts a nitrogen atom; which releases a triazole derivative or a diazole derivative on coupling with an oxidized primary aromatic amine developing agent, and with the emulsion layer unit containing the ICC coupler represented by the general formula (I) or another layer

Abstract: Polyoxyethylene compounds carrying thioether groups as substituents on the linear chain are described for accelerating or activating development of exposed silver halide elements.

Abstract: A photographic element containing an incorporated developing agent is disclosed which forms a photographic print having a warm image tone upon successive processing in an alkaline activator bath and a stabilizer bath. The element is comprised of a reflective nonporous support bearing a silver halide emulsion layer which forms a viewable silver image therein upon processing. The emulsion layer contains an azaindene antifoggant. The element additionally contains in or adjacent the emulsion layer a warm image tone providing mixture of a quaternary ammonium salt and a silver salt of a heterocyclic mercaptan.

Abstract: A silver halide photographic lithographic light-sensitive material having high halftone contrast comprising a support having thereon at least one hydrophilic colloid containing layer and containing at least one compound represented by the following formulae ##STR1## wherein R and R' each represents a hydrogen atom or an alkyl group containing from 1 to 18 carbon atoms, m is an integer of 1 or 2, and n is an integer of from 10 to 150, and at least one anionic surface active agent having a sulfonic group.

Abstract: A light-sensitive silver halide color photographic material comprising a new development inhibitor releasing type compound and a hardening agent and a process for developing thereof.

Abstract: An improved silver halide photosensitive material of the lith-type is disclosed which is suitable for an infectious development in order to obtain high contrast images with high sensitivity. A method for developing the material is also disclosed. The material comprises silver halide grains containing at least 50 mole per cent of silver chloride, less than 40 mole per cent of silver bromide and less than 5 mole percent of silver iodide based on total silver halide, the average size of the grains being 0.05 to 0.5 microns in diameter. The material further comprises a compound represented by the following general formula I or II ##STR1## wherein R is alkyl, aryl, aralkyl or acyl; R' is hydrogen or --OR; and R" is hydrogen or acyl.

Abstract: Photographic elements are disclosed which contain a blocked development restrainer which is designed to provide timely release of a development restrainer when the photographic element is processed with an alkaline processing composition. The photographic elements are especially useful in image-transfer film units where the blocked development restrainers will permit initial development to occur and, upon cleavage, will substantially restrain further development.

Abstract: Reduction and gold fogged direct-positive Lippmann-emulsions have improved gradation and higher maximum density when fogging occurs in the presence of a palladium compound.

Abstract: A photographic silver halide material with at least one halide emulsion layer and at least one substance in heterogeneous contribution emulsified in oilformer compounds and a process of preparing the said photographic silver halide materials. The substances are introduced into photographic emulsions prior to coating by way of adding a hydrophilic phase containing in emulsified form the substances which are emulsified in the hydrophilic phase in form of a solution containing at least one substantially diffusion-resistant, substantially water-insoluble, substantially non-coupling dispersible .beta.-diketo compound with at least 9 carbon atoms, .beta.-keto carboxylic acid ester, .beta.-keto carboxylic acid amide, cyanoacetyl compound or .beta.-dicarboxylic acid ester with at least 13 carbon atoms as oilformer. The photographic material shows advantageous results i.a. with respect of stability of the emulsified substances in the layers and excellent sensitometric results.

Abstract: Photographic elements comprising a silver halide emulsion layer give less fog in negative type emulsions and increased speed in direct-positive emulsions when said emulsions are developed in the presence of an organic heterocyclic or thioaryl-substituted tertiary phosphine.

Abstract: A sheet material including in working relationship with a reducible silver salt a sterically hindered phenol derivative having the following structural formula: ##STR1##

Abstract: A rapid drying photographic element suitable for rapid processing by the stabilization process is provided. The element comprises a support bearing (1) an acidic developer layer and (2) a basic gelatino-silver halide emulsion layer, both layers containing a binder comprising a substantial amount of colloidal silica.

Abstract: An improved lith-type silver halide photosensitive material of a wide latitude for infectious developing is disclosed which comprises, in an amount of 5 mg to 5 g per mole of silver halide, a compound represented by the following general formula: ##STR1## wherein R.sub.1 is a substituted or unsubstituted alkyl, aryl, aralkyl, arythio or aryloxy group, and R.sub.2 is hydrogen, halogen, alkyl, alkoxy or nitro.

Abstract: Heterocyclic N-oxides are useful as oxidants in photographic elements or film units.

Abstract: A color photographic light-sensitive material, comprising a support having thereon at least one silver halide emulsion and the light sensitive material containing a colored cyan coupler having a main absorption in the blue region of the spectrum and a colored cyan coupler having a main absorption in the green region of the spectrum, and a colorless cyan coupler, each coupler being capable of coupling with an oxidation product of a p-phenylenediamine color-developing agent to form a cyan dye.

Abstract: Direct positive film with incorporated developer having improved sensitometric properties and storage stability is obtained with a developer combination of hydroquinone monosulfonate and a superadditive developer of the 3-pyrazolidone or the N-methyl-p-aminophenol sulfate types.

Abstract: A method is described for developing silver halide emulsions wherein development is activated by incorporating in the developing composition or the emulsion a homopolymer or copolymer comprising (meth)acrylate or (meth)acrylamide units in which the ester linked or amide linked group contains at least one thioether sulphur atom.

Abstract: A radiation-sensitive element in which silver halide is the sole source of image-forming silver containing incorporated processing chemicals is processed in a fluid activator which does not cause the processed element to be tacky. The element includes a fluid-impermeable support having thereon a radiation-sensitive material in a hydrophobic binder which is impermeable to water. Activation of the exposed radiation-sensitive material by the fluid activating agent results in a processed element which is dry to the touch and is substantially free from tackiness when removed from contact with the fluid activator. If a stabilizer precursor is incorporated in the element, the image is unaffected by further exposure to radiation.

Abstract: Photographic images are produced by imagewise exposure, development and stabilization in which development is carried out in the presence of an .alpha.,.alpha.'-[2,5-dimercapto-1,2,4-triazolyl-4-imino] -p-xylene compound which improves the stability of the silver image in extreme climatic conditions.

Abstract: Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photographically useful group. In specific embodiments, the compounds of this invention contain an electrophilic cleavage group located in the linkage between a ballast group and a photographically useful moiety wherein said electrophilic cleavage group is a carbamic acid derivative.

Abstract: Photographic elements having a radiation-sensitive, colloid - silver halide emulsion layer and a contiguous light-insensitive layer containing an oxidizing agent selected from the group consisting of iodine and potassium iodate.

Abstract: A lith-type light-sensitive silver halide photographic material which gives a hard tone and sharp dot image contains in the emulsion layer or one of the layers adjacent thereto a hydroimidazo-s-triazine compound and a polyalkylene oxide derivative.

Abstract: A photographic light-sensitive material comprising a support having thereon at least one silver halide photographic emulsion layer and at least one of the layers of the photographic light-sensitive material containing a compound represented by the following general formula (I) or (II); ##EQU1## wherein R.sub.1, R.sub.2 and R.sub.3 each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic residue, or R.sub.1 and R.sub.2 can combine to form a ring; and Z represents an alkylene group; or an organic acid salt or a mineral acid salt of the compound represented by the general formula (I) or (II). The photographic material can be developed at an elevated temperature without fog information and a decrease in photographic sensitivity.

Abstract: A photographic material comprising a support having thereon a photosensitive silver halide emulsion layer containing a hydroquinone derivative which releases a development inhibitor or a development accelerator at development and including an absorbing colloid layer for adsorbing the development inhibitor or accelerator containing silver halide particles which are not substantially developed by development on the silver halide emulsion layer or between the silver halide emulsion layer and the support.

Abstract: A process for developing a light-sensitive silver halide photographic material in the presence of a new development inhibitor releasing type compound which liberates a compound having development inhibiting action and simultaneously produces a colourless compound.

Abstract: A silver photosensitive material comprising a development inhibitor-releasing compound of the formula ##EQU1## wherein Z is an atomic group necessary to form a 5 to 7 membered saturated or unsaturated carbon ring with the carbon atoms to which it is attached, said ring being unsubstituted or substituted by at least one of halogen and a member of the class consisting of alkyl, aryl, alkoxy, acyloxy, aryloxy, SY and a group forming a condensed carbon ring with said saturated or unsaturated carbon ring; Y is arylmercapto, heterocyclic, thioglycollic acid, cystein or glutathione. A method for the development of silver halide photosensitive material by the use of the foregoing compound is also disclosed.

Abstract: A method of developing an exposed silver halide photographic material having a silver halide emulsion layer containing a heterocyclic compound having at least one nitrogen atom, having a thione group which does not undergo enolation positioned next to the nitrogen atom, and not having a nitro group in an aldehyde type hardening agent containing developer at a temperature of not less than about 30.degree.C.