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: A processing composition adapted for use in a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 repeating units of ethylene oxide per hydrophobe.

Abstract: Noble metal silver-precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a first polymer with a Sn.degree. colloid formed by the non-aqueous borohydride reduction of a tin salt in the presence of an organic solvent for the tin salt and a nitrogen-containing metal chelating polymer. The invention is also directed to film units employing said nuclei.

Abstract: The present invention is directed to a method for preparing a photosensitive silver halide emulsion comprising silver halide grains prepared by simultaneously introducing a solution of ammoniacal silver nitrate and a solution of an ammonium halide into a solution of gelatin and a second ammonium halide. The invention is also directed to photographic elements employing such silver halide emulsions.

Abstract: Noble metal silver precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a polymer with a Sn.degree. suspension formed by the borohydride reduction of a tin salt. The invention is also directed to film units employing said nuclei.

Abstract: Noble metal silver precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a polymer with a Cr.sup.+3 /Sn.degree. complex. The invention is also directed to film units employing said nuclei.

Abstract: Photosensitivity of a blue-sensitive emulsion in a multi-color diffusion transfer photographic system is enhanced by sensitizing the emulsion with certain 3,3'-disubstituted 4,5-benzothia-thiacyanine betaines.

Abstract: A silver diffusion transfer film unit comprising a transparent support carrying on one surface, in order, a layer comprising silver precipitating nuclei, a photosensitive silver halide emulsion layer and a layer comprising a processing composition permeable polymer layer, a substantially photoinsensitive, water-insoluble inorganic silver salt and a substantially water-insoluble noble metal compound containing a noble metal below silver in the Electromotive Force Series of Elements. In a preferred embodiment the film unit includes an additive color screen.

Abstract: Photosensitive silver halide emulsions are prepared by alternating precipitation of silver halide and the addition of a water-soluble iodide salt which replaces a portion of the less soluble halide.

Abstract: Clusters or galaxies of noble metal silver-precipitating nuclei for use in silver diffusion transfer processes are formed by reducing a noble metal salt or complex to form a colloid of noble metal nuclei and inducing instability to said colloid, whereby said galaxies are formed.

Abstract: Silver-precipitating nuclei are prepared by partially oxidizing a stannous salt reducing agent and then reducing a noble metal salt or complex with said reducing agent.

Abstract: A receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising gelatin, hydroxyethyl cellulose and noble metal silver-precipitating nuclei; wherein said nuclei are present in a level of from about 0.1-0.4 mgs/ft.sup.2, gelatin is present at a level of from about 0.05 to 1.5 mgs/ft.sup.2 and hydroxyethyl cellulose is present at a level of about 0.1 to 7 mgs/ft.sup.2. Preferably, the noble metal is palladium. The receiving element is particularly useful in an additive color diffusion transfer process.

Abstract: A receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising gelatin, polyvinyl alcohol and noble metal silver-precipitating nuclei; wherein said nuclei are present in a level of from about 0.1-0.4 mgs/ft.sup.2, gelatin is present at a level of from about 0.05 to 1.5 mgs/ft.sup.2 and polyvinyl alcohol is present at a level of about 0.1 to 5 mgs/ft.sup.2. Preferably, the noble metal is palladium. The receiving element is particularly useful in an additive color diffusion transfer process.

Abstract: This invention is directed to a film unit composed of a support carrying on one side a processing composition permeable layer containing an acid reacting reagent therein, and, on the other side, silver precipitating nuclei and photosensitive silver halide crystals. The above film unit is particularly suitable for use as motion picture film, i.e., in the form of an elongated web wherein said film unit is unwound, exposed, contacted with a photographic processing composition containing, e.g., a silver halide developing agent and silver halide solvent, rolling said film unit upon itself thereby contacting the processing composition permeable layer with the layers on the opposite side of the support. The acid reacting agent will diffuse into the silver halide and nuclei containing layers providing enhanced stability to the film unit.

Abstract: A relatively thin, flat or planar battery which includes one or more cells, each cell having a planar anode in superposed relationship with a planar cathode and a separator disposed intermediate and extending substantially coextensive the facing surfaces of the anode and cathode and possessing an aqueous electrolyte solution disposed in the central portion of the separator. The end cell anode comprises a zinc sheet carrying a coating of zinc particles wherein both the sheet and the particles are in contact with the electrolyte.

Abstract: A processing composition adapted for use in a silver diffusion transfer film unit which includes an alkali soluble borate compound.

Abstract: Silver diffusion transfer image-receiving elements are formed by hydrolyzing a solution of a hydrolyzable cellulose ester, coating a support with a layer of said hydrolyzed cellulose ester and disposing silver precipitating nuclei therein.

Abstract: The present invention is directed to a method for forming the crystals of a photographic silver halide emulsion which comprises crystallizing silver halide grains from a solution of a water-soluble complex of silver halide complexed with excess halide ions. The crystals may be sensitized before the binder is added.

Abstract: As a novel composition of matter, a copolymer of 2-acrylamido-2-methylpropane sulfonic acid and a vinyl aminimide.

Abstract: A photographic sound recording and reproduction method is disclosed wherein a sound track is formed by silver diffusion transfer processing. Film units suitable for this application are described which comprise a support, a layer containing silver precipitating nuclei, and a layer containing photosensitive silver halide crystals.In one embodiment, a photographic sound track may be produced in a silver diffusion transfer color motion picture film unit, which further comprises an optical color screen.