Abstract:
A photographic recording material is described which comprises a chemically sensitized photosensitive silver halide emulsion layer which has a pH value from 2 to 5 and a pAg value from 1 to 4.7. Also disclosed are sensitizing dyes for use with the described photographic recording materials.
Abstract:
Imaging elements, including radiation-sensitive elements such as photographic color paper products, are comprised of a support bearing a substantially crystal- and agglomeration-free hydrophilic layer. This layer comprises a hydrophilic composition containing a hydrophilic binder and water-insoluble polymer particles dispersed therein. These particles have recurring units derived from a monomeric composition composed of one or more ethylenically unsaturated polymerizable monomers with more than about 5 percent and up to 100 percent by weight of the monomeric composition consisting of at least one ethylenically unsaturated polymerizable monomer having a crosslinkable moiety, and comprise at least about 0.5 percent by weight of a hydrophobe uniformly distributed throughout.
Abstract:
This invention concerns a luminescent optical memory material and method of forming this material, including the encoding of information by a photographic process. The method involves the use of silver halide crystals of a defined size range, with the optional use of sensitizers, emulsion stabilizers, and other agents followed by the absorption of luminescent dyes on the developed silver particles to form a luminescent optical memory system. The method involves synthesis of a photographic emulsion with silver halide crystals of a defined size range, applying photographic emulsion to a substrate, exposing to light photochemical treatment and a process of transformation of the silver particles formed in the places exposed by light into luminescent particles. The method involves obtaining a multi-layer luminescent material for three-dimensional optical memory devices.
Abstract:
A photographic element comprising a polymeric film base, a silver halide emulsion layer, and an antistatic layer comprising a colloidal vanadium oxide and a vinyl addition polymer dispersion in a dry weight ratio of from 1:30 to 1:500. The antistatic layer may be present as a backing layer on the side of the base opposite the silver halide emulsion layer, as a subbing layer between the base and the emulsion layer in a single or double side coated photographic element, and/or as a subbing layer between the base and a different backing layer. No barrier layer is used over the antistatic layer. Also a process for making an element having antistatic properties.
Abstract:
Undesirable dye stain in a photographic element containing a disulfonamidophenol oxidized developer scavenger can be significantly reduced when the disulfonamidophenol scavenger is in the form of a crystalline solid particle dispersion prepared by milling crystalline solid particles of the scavenger in an aqueous medium in the presence of a dispersing agent and in the substantial absence of an organic solvent.
Abstract:
A photothermographic emulsion is prepared by chemically sensitizing silver halide grains by oxidative decomposition of an organic sulfur-containing compound on or around the silver halide grains. This procedure uses a unique sequence of steps and provides increased photographic speed and manufacturing reproducibility. The resulting photothermographic emulsion can be used to prepare photothermographic materials.
Abstract:
A silver halide color photosensitive material exhibiting an excellent granularity even though it has a high photosensitivity and exhibiting favorable photography performance hardly changing even if a silver halide emulsion coating solution is left before coating and excellent performance stability after long-term storage. The material comprises a support and further comprises, over one side of the support, at least one red-photosensitive layer, at least one green-photosensitive layer, at least one blue-photosensitive layer, and at least one non-photosensitive layer. The material is characterized in that at least one photosensitive layer of the red-, green-, and blue-photosensitive layers contains a compound expressed by general formula (1) shown below and a compound expressed by general formula (2) shown below, and in that the compound expressed by general formula (1) is added to a coating liquid for the photosensitive layer before the compound expressed by general formula (2) is added while the coating liquid is prepared.
Abstract:
This invention concerns a luminescent optical memory material and method of forming this material, including the encoding of information by a photographic process. The method involves the use of silver halide crystals of a defined size range, with the optional use of sensitizers, emulsion stabilizers, and other agents followed by the absorption of luminescent dyes on the developed silver particles to form a luminescent optical memory system. The method involves synthesis of a photographic emulsion with silver halide crystals of a defined size range, applying photographic emulsion to a substrate, exposing to light photochemical treatment and a process of transformation of the silver particles formed in the places exposed by light into luminescent particles. The method involves obtaining a multi-layer luminescent material for three-dimensional optical memory devices.
Abstract:
A process is provided for preparing concentrated dye-water compositions for spectrally sensitizing photographic emulsions in the absence of a solvant or surfactant which comprises adding a sensitizing dye having a solubility in water as low as about 0.005 weight percent to water or a water-polymer medium with agitation at a temperature of from about 20 DEG to about 50 DEG C and continuing agitation for from about 30 minutes to about 5 hours.