Abstract: A photographic element is disclosed comprising a film support, at least one light-sensitive layer, a highly loaded layer which contains more than 30 volume percent of non-film forming particulate material, and upper and lower aqueous coated adjacent layers which are next to the highly loaded layer, the upper adjacent layer being further from the support and the lower adjacent layer being closer to the support relative to the highly loaded layer, each adjacent layer having a film forming binder content of greater than 70 volume percent, and the lower adjacent layer being at least 1.0 micron thick.

Abstract: The present invention is an imaging element which includes a support and at least one image forming layer superposed on the support. A transparent magnetic layer is superposed on the support and includes magnetic particles, fluorinated polymeric particles having a size of from 0.01 to 1.5 .mu.m, and a water dispersible binder, the transparent magnetic layer having a weight ratio of magnetic particles to aqueous dispersible binder of from 0.1:100 to 30:100.

Abstract: An ink jet printing ink composition is disclosed for use with an ink jet printing apparatus comprising a printhead, an ink delivery system adapted to provide the ink to the printhead, and a sensor associated with the ink delivery system adapted to produce a signal which is characteristic of the concentration of a label material in a printing ink, where said signal is used to indicate the appropriateness of using a particular printing ink. The ink composition comprises a carrier, a colorant, and a predetermined concentration of a distinct label material, the weight ratio of the label material to the colorant being less than 1. The label material may be easily detected by a sensor associated with the ink delivery system.

Abstract: An imaging element is disclosed comprised of a support and, coated on the support, at least one radiation-sensitive emulsion layer containing (a) radiation-sensitive silver halide grains and (b) an aqueous processing solution permeable vehicle, wherein the radiation-sensitive emulsion layer additionally contains (c) from 0.1 to 10 mg/dm.sup.2 of magnetic particles having a major axis less than 1 .mu.m and, (d) based on the weight of the magnetic particles, from 10 to 200 percent of an amphipathic dispersant for the magnetic particles having a hydrophilic/lipophilic balance number of at least 8.

Abstract: A radiation-sensitive silver halide film for reproducing digitally stored medical diagnostic images through a series of laterally offset exposures by a controlled radiation source followed by processing in 90 seconds or less, including development, fixing and drying. The film exhibits an average contrast in the range of from 1.5 to 2.0, measured over a density above fog of from 0.25 to 2.0. An emulsion layer is provided in which silver bromochloride grains (a) comprised of at least 10 mole percent bromide, based on silver, (b) having a mean equivalent circular diameter of less than 0.40 .mu.m, (c) exhibiting an average aspect ratio of less than 1.3, and (d) coated at a silver coverage of less than 40 mg/dm.sup.2. Adsorbed to the surfaces of the silver bromochloride grains at least one spectral sensitizing dye having an absorption half peak bandwidth in the spectral region of exposure by the controlled exposure source.

Abstract: An aqueous coating composition for forming a transparent magnetic recording layer contains a fine solid particle aqueous dispersion of dispersed magnetic particles, gelatin, and a polyelectrolyte having a molecular weight of at least 50,000. The coating composition may be prepared by milling an aqueous slurry of magnetic particles and a surface active dispersant having an HLB number of at least 8 until there are substantially no agglomerates of magnetic particles present, and then combining the milled dispersion with the gelatin and polyelectrolyte. The coating composition can be used to prepare magnetic recording elements and, in particular, photographic elements having a transparent, substantially haze-free magnetic recording layer.

Abstract: A method of making a transparent magnetic recording layer which comprises forming a concentrated aqueous magnetic dispersion (A) of from 10 to 50 percent by weight ferromagnetic particles having a specific surface area of at least 30 m.sup.2 /gm and from 0.5 to 20 percent by weight of a dispersing agent; adding the concentrated aqueous magnetic dispersion (A) to a viscosity increasing hydrophilic polymer in water (B) such that the concentration of the hydrophilic cobinder is from 0.5 to 3 percent by weight based on the total weight of (A) and (B); diluting the resulting dispersion (A) plus (B) with water to give a dispersion (C) having a concentration of from 0.

Abstract: A photographic element having a light-sensitive layer and a transparent magnetic recording layer, the transparent magnetic recording layer comprising ferromagnetic particles having a ferromagnetic core and a shell of tin oxide or metal antimonate in a binder.

Abstract: A stable aqueous dispersion of magnetic particles contains a dispersant having an HLB number of at least 8. The dispersion is prepared by milling an aqueous slurry of magnetic particles until there are substantially no agglomerates of magnetic particles present. The dispersion can be used to prepare magnetic recording elements and, in particular, photographic elements having a transparent magnetic recording layer.

Abstract: Disclosed herein is an improved gas phase process for the selective epoxidation of non-allylic olefins wherein the epoxidation is carried out in the presence of certain inert, paraffin hydrocarbons. Such hydrocarbons possess higher heat capacities as compared to other materials, e.g., nitrogen, argon, methane and helium, typically used as inert diluents in olefin epoxidations. The disclosed process is particularly useful for the continuous manufacture of 3,4-epoxy-1-butene from 1,3-butadiene.

Abstract: A photographic element including a light-sensitive layer and a transparent magnetic layer wherein the magnetic particles in the transparent binder are cobalt surface treated gamma iron oxide (Fe.sub.2 O.sub.3) having a specific area of at least 30 m.sup.2 /g, the particles being coated with from about 10 to about 50% by weight of a material having a refractive index less than that of the binder, the particles having a powder coercivity greater than about 450 Oe.

Abstract: Magnetic particles are cobalt surface treated gamma iron oxide (Fe.sub.2 O.sub.3) having a specific area of at least 30 m.sup.2 /g and a powder coercivity greater than about 450 Oe, the particles being coated with from about 10 to about 50% by weight of a material having a refractive index less than about the refractive index of a binder for the particles.

Abstract: Ferromagnetic metallic particles having incorporated into the surface a rare earth element are employed to make magnetic recording elements. These particles are obtained from non-magnetic particle precursors by treating with a rare earth salt in an aqueous solution.