Abstract: Means are provided in a photographic film pack for urging the superposed sheet elements of a diffusion transfer film unit together during the withdrawal of said film unit from its container. Said means are useful for eliminating white specks in the resultant positive transfer print.

Abstract: A galvanic cell having a zinc anode which contains in the electrolyte as a corrosion inhibitor a chloride double salt containing mercuric ions and quaternary ions. The corrosion inhibitor may be represented by the formula:M Hg.sub.x Cl.sub.ywherein M is a quaternary ammonium cation, x is 1, 2 or 3, and y is 3 to 8.

Abstract: Trimethylamine acrylimide is prepared by condensing a mixture of 3-chloropropionyl chloride, 3-chloropropionic acid and trimethylhydrazinium p-toluenesulfonate; and then converting the thus-formed intermediate to the trimethylamine acrylimide, including the step of deprotonating with base.

Abstract: The present invention relates to a photographic silver halide emulsion layer having disposed therein microvoids to provide photographic speed enhancement to said emulsion. The silver halide emulsion layers are particularly useful in additive multicolor photographic film units.

Abstract: An electrolytic cell for generating silver ions and halide ions for the formation of photosensitive silver halide grains wherein the cathode comprises elemental halogen and electrically conductive carbon.

Abstract: An electrolytic cell for generating silver ions and halide ions for the formation of photosensitive silver halide grains wherein the anode comprises particulate silver.

Abstract: Unwanted localized image effects in diffusion transfer photographs are minimized by partially removing portions of the two transverse cassette walls which constrain retained film units against lateral movement.

Abstract: A photographic film unit comprising superposed photosensitive and image-viewing elements including an area adapted to be exposed and processed by an aqueous alkaline processing composition spread in a layer between the two elements to facilitate formation of a transfer image. A trap for excess processing compositon is affixed to one end of the unit and the entire assemblage is secured together by a binding element which is secured around and to at least three edges of the film unit including the edge to which is affixed the trap. The binding element comprises foldable tabs on both sides of the trap area and, when the element is folded to provide binding functionality, the tabs are located slightly inboard of the trap whereby the thickness of the film unit in the area of a tab is increased by the thickness of the tab.

Abstract: Novel substantially colorless dye precursors represented by the formula ##STR1## WHEREIN R.sup.1 is hydrogen or alkyl; R.sup.2, R.sup.3 and R.sup.5 is alkyl; R.sup.4 is alkyl or phenyl; Z, taken with N, represents the atoms necessary to make a benzthiazole radical; X is an acid anion; and n is 1 when R.sup.5 carries a negative charge and 2 when R.sup.5 is electrically neutral.

Abstract: Diffusion transfer products and processes are disclosed wherein the processing composition includes, as the viscosity increasing component thereof, a polymer containing recurring groups of the formula: ##STR1## wherein R is hydrogen, alkyl or halogen; R.sub.1 is alkyl; R.sub.2 and R.sub.3 each are alkyl, aryl or alkaryl or R.sub.2 and R.sub.3 together may comprise an alkylene group to form a heterocyclic ring with the nitrogen.

Abstract: Photosensitive silver halide emulsions are prepared by the precipitation of silver halide grains from silver and halide ions generated by electrolysis.

Abstract: This invention is directed to an additive color diffusion transfer film unit which comprises, in order, an additive multicolor screen, a silver precipitating layer, a layer of chitin having a copper salt disposed therein, and a photosensitive silver halide layer.

Abstract: Seal integrity tests are conducted on electrical energy storage devices, such as batteries, by the application, to the device under test, of oxygen at elevated pressures.

Abstract: The present invention relates to photography and, more particularly, to a novel spectrally (optically) sensitized radiation recording photographic element which comprises a cyanine dye of the formula: ##STR1## wherein L represents a methine group; m represents a positive integer of from 1 to 3, inclusive; Z and Z.sub.1 each represents the nonmetallic atoms necessary to complete a cyanine dye heterocyclic ring system containing a 5 or 6 membered heterocyclic nucleus; R and R.sub.1 each represents a divalent acyclic or cyclic group; X.sup.+ represents a quaternary ammonium, sulfonium or phosphonium group; Y.sup.- represents a --SO.sub.3.sup.- or --COO.sup.- group; and W.sup.- represents an anion.

Abstract: Novel image-receiving elements for obtaining photographic images in silver which comprise a support carrying, as a silver precipitating layer, a layer of inorganic stannic oxide polymer (tin hydrosol) having a noble metal reduced thereon.

Abstract: The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive element adapted to provide, by diffusion transfer photographic processing, selective dyde image recordation of incident actinic radiation as a function of the point-to-point degree of photosensitive element exposure, which film unit includes a plurality of essential layers including a photosensitive silver halide layer having associated therewith dye image-forming material which is diffusible during processing as a function of the point-to-point degree of silver halide layer exposure to incident actinic radiation and a layer adapted to receive image-forming material diffusing thereto; means for applying an aqueous composition therebetween, said composition comprising 0.1-10%, by weight, of a viscosity increasing polymer comprising carboxymethyl hydroxyethyl cellulose. Optionally, said composition also includes titanium dioxide in a ratio of 1 to 10 g.

Abstract: This invention relates to novel polymers containing a plurality of hydroxyl groups having aminimide groups attached thereto through an ether linkage and to methods for attaching said aminimide groups onto said polymers containing a plurality of hydroxyl groups.

Abstract: The present invention relates to photography and, more particularly, to a novel radiation recording photographic element which comprises a direct positive photosensitive element which includes, in combination, a particulate dispersion of fogged silver halide crystals, adapted to discharge the fogged silver halide upon exposure to electromagnetic radiation actinic thereto, having associated therewith in electron accepting relationship a semiconductor adapted to accept electrons from said silver halide crystals as a function of the exposure of the crystals to incident electromagnetic radiation actinic thereto.

Abstract: Coating a solution comprising a hydrophilic colloid and ammonia over a receiving layer comprising polyvinylpyridine in an image-receiving element of a photographic film unit significantly reduces haze and facilitates the separation of the image-receiving element from the remainder of the film unit subsequent to diffusion transfer processing.

Abstract: Colloidally stable dispersions of a spectral sensitizing dye are formed directly in water without the use of an organic solvent. The process of the invention involves mixing the dye particles with water to form a slurry and then homogenizing or milling the slurry at an elevated temperature in the presence of a surfactant to form finely divided particles uniformly dispersed in the water.