Abstract: A photographic image was produced by storing a geranium leaf in darkness and then projecting a light image on the leaf for a sufficient time to produce a suitable latent starch image, the leaf then being treated to extract the chlorophyll and then flooded with an iodine solution to stain the starch and develop the photographed image. Alternatively, instead of the leaf, a photographic medium may be employed including a film of a starch free, water, carbon dioxide and light permeable matrix, such as gelatin, having dispersed therein chloroplast containing algae or photosynthetic bacteria.

Abstract: A method for processing a color photographic light-sensitive material comprising subjecting an exposed silver halide color photographic light-sensitive material to color development processing then to bleach processing and fixing processing separately, wherein a bath of the bleach processing contains (a) at least one bleach accelerating agent selected from a compound having a mercapto group or a disulfide bond, a thiazolidine derivative and an isothiourea derivative and (b) at least one compound represented by the following general formula (I-a) or (I-b): ##STR1## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium ion; R represents a hydrogen atom, a substituted or unsubstituted alkyl group, --SO.sub.3 M.sup.1 or --COOM.sup.1 ; R.sup.1 represents --SO.sub.3 M.sup.1 or --COOM.sup.1 ; M.sup.1 represents a hydrogen atom, an alkali metal atom or an ammonium ion; and n represents an integer of 1 to 6 and when n is 2 or more, R's may be the same or different.

Abstract: There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline processing composition is effected in the presence of a compound which is a salt of a radical of a substituted phenylmercaptoazole complexed with a radical of a quaternary. The salts are either insoluble or have extremely low solubility in water and become soluble, and photographically active, in alkaline environment.

Abstract: Photographic film units and processes are disclosed which provide a negative image, wherein exposed silver is developed to high covering power silver and unexposed silver halide is reduced to low covering power silver.

Abstract: A photographic element for a silver salt diffusion transfer process is described, comprising a silver halide light-sensitive element, an image receiving element and a processing element, the improvement wherein said photographic element contains a compound represented by formula (I) or (II) ##STR1## wherein the R.sub.

Abstract: A method for producing a phase hologram having a high diffraction efficiency which includes treating a developed photographic material with a stop bath containing sodium sulfate, bleaching with a tanning bleach having a low pH value and fixing the bleached material in a bath containing sodium thiosulfate.

Abstract: A process for stabilizing a silver image is disclosed. The process is utilized in connection with a photographic material which is comprised of a water impermeable support having one or more light-sensitive silver halide emulsion layers thereon. After the photographic material is exposed and developed it is subjected to further processing by conventional means. However, within the further processing an aqueous solution is utilized which includes any compounds represented by the general formula (I), (II) or (III) as defined within the specification. The compound(s) represented by the general formula is/are generally present within the processing solution in a total amount of about 0.1 to 10 g/l of processing solution. By utilizing the aqueous solution containing the compound represented by the general formula within the processing, it is possible to greatly increase the stability of the silver image formed.

Abstract: A color photographic silver halide light-sensitive material is described, containing at least one member of the compounds represented by the general formula (I-a) and (I-b) in at least one layer thereof: ##STR1## (wherein all the symbols are defined in the appended claims). This color light-sensitive material can be subjected to rapid photographic processing; i.e., the compounds of the general formula (I-a) and (I-b) act as bleach accelerators, making it possible to perform rapid photographic processing without exerting adverse influences on photographic characteristics.

Abstract: A developer composition of an alkaline aqueous solution containing a reducing inorganic salt, typically an alkali metal salt of sulfurous acid such as sodium sulfite, is found to be applicable for development of a lithographic printing plate material containing a photosensitive o-quinonediazide compound and an organic polymer, with reduced deterioration in developing capacity caused by the air and enhanced stability with lapse of time. In particular, a developer composition composed of an alkaline aqueous solution of pH 11 or higher containing a water-soluble sulfurous acid salt is effective for developing both of a lithographic printing plate material having a nega-type photosensitive layer containing a photosensitive diazo compound and an organic polymer, and a lithographic printing plate material having a posi-type photosensitive layer containing an o-quinonediazide compound and an organic polymer.

Abstract: .alpha.-Ketoimidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; andPR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the blocking group.

Abstract: Mesoionic 1,2,4-triazolium-3-thiolate silver halide stabilizer precursors are novel compounds useful in a heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic material, a developed and stabilized silver image is produced by heating the element. Mesoionic stabilizer precursors are also useful in photographic silver halide processing compositions.

Abstract: This invention relates to photographic products and processes employing silver halide solvent precursors of the formula ##STR1## wherein R.sup.1 is a monovalent organic radical; R.sup.2 is hydrogen or a monovalent organic radical; Z is a moiety that undergoes .beta.-elimination in aqueous alkaline solution and preferably is a moiety that undergoes .beta.-elimination in aqueous alkaline solution to release a photographically useful reagent; and n is an integer 3, 4 or 5.

Abstract: This invention relates to photographic products and processes employing silver halide solvent precursors of the formulae ##STR1## wherein R.sup.1 and R.sup.2, the same or different, each are hydrogen, alkyl, phenalkyl, phenyl or phenyl substituted with an electron-donating or electron-withdrawing group; R.sup.3 is alkyl, phenalkyl, phenyl or substituted phenyl; Z is --CN or --SO.sub.2 R.sup.4 wherein R.sup.4 is branched-chain alkyl, phenalkyl, phenyl or substituted phenyl; and n is an integer 3, 4 or 5.

Abstract: Certain organic, carbon acid silver halide complexing agents in a photographic diffusion transfer system provide suitable replacement for conventional silver halide complexing agents. Such organic, silver halide complexing agents include certain sulfones, nitriles and onium salts. These are especially useful in a silver salt diffusion transfer system. They can be employed with silver halide developing agents, such as in a monobath, and are especially suitable with a hydroxylamine silver halide developing agent. Other addenda commonly employed in photographic diffusion transfer systems can be employed in combination with these silver halide complexing agents.

Abstract: There are described photographic products, processes and compositions wherein cyclic crown ether ligands are utilized as silver halide solvents. Also disclosed are novel cyclic crown ether ligands.

Abstract: Mesoionic 1,2,4-triazolium-3-thiolate silver halide stabilizer precursors are novel compounds useful in a heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic material, a developed and stabilized silver image is produced by heating the element. Mesoionic stabilizer precursors are also useful in photographic silver halide processing compositions.

Abstract: A stain retarding concentration of a phosphine antistain agent or phosphine antistain agent precursor in the undercoat layer of a photographic silver halide element comprising a support having thereon (a) a photographic silver halide gelatino emulsion layer, and (b) an undercoat layer between the emulsion layer and the support, provides reduced stain in the element upon exposure and processing. The photographic element preferably comprises a silver halide developing agent. The photographic element, after exposure, is preferably processed by means of an aqueous alkaline activator bath and then an aqueous thiosulfate stabilizer bath.

Abstract: Alkanes containing an intralinear sulfonyl group and a cyano 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: Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

Abstract: Photographic negative material which has at least one layer which contains a desensitized silver halide emulsion, the desensitizer used being a trinuclear heptamethinecyanine or a halogenated trinuclear tetramethinecyanine which has three identical heterocyclic ring systems, which can have different substituents and are linked to one another by three identical methine systems, which can be mesomeric, is suitable for processing in subdued daylight but nevertheless has an adequate sensitivity on exposure to intense light.

Abstract: A liquid processing composition for silver complex diffusion transfer process which contains the specific quaternary ammonium salts as defined in the specification prevents formation of colored sludge for a long time without damaging characteristics of silver complex diffusion transfer development and improves color tone of silver images obtained.

Abstract: A novel photographic film unit, preferably a diffusion transfer film unit adapted to provide silver images of enhanced image stability which comprises photosensitive silver halide, silver precipitating nuclei and a stabilizing compound consisting of a noble metal complexed with a ligand, said ligand being adapted to hydrolyze in aqueous alkali to provide a diffusible complex of said noble metal.

Abstract: There are described novel acyclic silver complexing agents which are useful as silver halide solvents in photographic products, processes and compositions. Also disclosed are photographic compositions, products and processes in which the complexing agents are utilized.

Abstract: There are described photographic products, processes and compositions wherein cyclic crown ether ligands are utilized as silver halide solvents. Also disclosed are novel cyclic crown ether ligands.

Abstract: There is described a photograhic method employing a positive-negative diffusion transfer film unit wherein there is formed a positive silver transfer image which may be viewed as a positive transparency without being separated from the developed negative silver image, including an embodiment wherein additive color projection positive images are formed. According to the method, the exposed film unit is developed by contacting the silver halide emulsion layer with a photographic processing composition which comprises an aqueous alkaline solution containing a silver halide developing agent and a silver complexing agent. The silver complexing agent is stable in an alkaline environment, has a melting point less than about 50.degree. C. preferably about 25.degree. C. or less, and the log of the stability constant (.beta.) for a 1:1 complex of the complexing agent with silver is at least about 10.5. The film unit is not washed during the method.

Abstract: A photographic material for the production of an image in a dry process by forming a vesicle image upon the decomposition of a peroxide compound at image nuclei of silver by providing a layer containing a silver salt which forms upon exposure to light, in imagewise distribution, image nuclei. The silver salt has a grain size of less than 0.3 .mu.m and is present in the layer in an amount of from 1-500 mg/m.sup.2.

Abstract: There are described novel acyclic silver complexing agents which are useful as silver halide solvents in photographic products, processes and compositions. Also disclosed are photographic compositions, products and processes in which the complexing agents are utilized.

Abstract: An image-forming agent selected from polyacids of molybdenum and tungsten and salts and complexes of these polyacids and disposed as a layer on at least one surface of a support substrate is reduced thereby being caused to undergo coloring in the form of an image and is then irradiated over its entire surface including thus colored parts and yet uncolored parts with long wavelength light rays which are absorbable by only the colored parts thereby to produce a colored image wherein the optical density of only the colored parts is selectively increased to a remarkable degree.

Abstract: In a dry physical development photothermographic element for a dry thermal silver-dye bleach process wherein the element comprises a silver halide complexing concentration of a silver halide complexing agent improvements are provided when the complexing agent is an organic ammonium chloride, bromide or iodide. After imagewise exposure of the element, a dye image can be produced by uniformly heating the element. Improvements are also produced by providing a dry activator element for producing a dye image in a separate photographic element by means of a dry physical development thermal dye-bleach process, wherein the activator element comprises a support having thereon a layer comprising a synthetic hydrophobic polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, as described, a bleachable dye and a thermal solvent.

Abstract: Volume dielectric holograms are prepared by methods which have in common the intra-emulsion diffusion transfer of silver atoms within the emulsion by a process of dissolving undeveloped silver halide, and diffusing and precipitating said dissolved silver on precipitation sites provided by the development of the exposed silver halide. The resulting metallic silver is then rehalogenated to substantially reconstitute the original silver halide volume of the emulsion.

Abstract: Difunctional compounds wherein one of said functions is a hard or soft atom that ionizes to the corresponding anion in alkaline solution to combine with silver cation and the other of said functions is a non-ionizable soft base that additionally combines with said silver cation are employed as silver halide complexing agents in photography. In a preferred embodiment, the difunctional compounds possess (a) an O, N or C atom that ionizes to the corresponding O.crclbar., N.crclbar. or C.crclbar. anion in basic solution and (b) an --S-- containing moiety excluding --SH and moieties that form --S.crclbar. in basic solution wherein the --S-- of said moiety is positioned alpha, beta, gamma, delta, epsilon or zeta to said anion.