Polaroid Corporation

Boris Levy

Stanley M Bloom

Robert D Eckert

John B Mahoney

A receiving element for use in an additive color photographic diffusion transfer process which comprises a transparent support carrying an additive color screen and a layer comprising noble metal silver precipitating nuclei and a polymer; wherein said nuclei are present in a level of about 0.1-0.3 mgs/ft.sup.2, and said polymer is present at a level of from about 0.5 to 5 times the coverage of said nuclei. Preferably, the noble metal is obtained by reduction of a noble metal salt or complex, and more preferably, the noble metal is palladium.

Image receiving elements

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.

Method for forming clusters of noble metal silver precipitating nuclei

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.

Novel method for forming silver diffusion transfer image receiving layers

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.

Image receiving elements comprising stannic oxide polymers having noble

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.

Fogged, direct-positive silver halide emulsion containing a gallium

The present invention relates to photography and, more particularly, to a novel radiation recording photographic diffusion transfer process film unit which comprises a photosensitive element which includes, in combination, a particulate dispersion of photosensitive crystals, preferably, photosensitive silver halide crystals adapted to be reduced to silver, upon contact with a silver halide reducing agent, as a function of the crystals' exposure to incident actinic electromagnetic radiation, having associated therewith an inorganic semiconductor adapted to donate electrons to the photosensitive crystals as a function of the exposure of the element to incident actinic electromagnetic radiation.

Silver halide photographic products with semiconductor sensitizers

The characteristics of the surface of an article may be modified, e.g., in respect to adhesion, wettability or other physical characteristics, by exposing the surface to an electrical discharge in a mixture of certain gases. The practice of this invention is particularly useful in improving the gelatin adherence characteristics of a photographic film base support.

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Wayland, MA, United States of America

Boris Levy