摘要:
This invention provides a process for removal of silver halide from a silver halide photographic recording material by a processing solution with fixing ability (a fixer) containing thiosulfate as a fixing agent conducted in the presence of a thioether compound incorporated within a fixer formulation. It further provides a fixer formulation for use in said process. The fixer contains a maximum ammonium ion concentration of 0.9M.
摘要:
The invention is accomplished by providing an iodide ion absorbing method and article. The article is a composite article comprising a surfactant, an iodide absorbing medium, and a polymer that is permeable to iodide ion overlaying the iodide absorbing medium. In a preferred embodiment of the invention the polymer is an ionic polymer and the surfactant is an ionic surfactant with a charge opposite to that of the polymer. The surfactant can be incorporated in the absorbing medium, in the polymer, or it can overlay the polymer. In a preferred form of the invention, a substrate is coated with the iodide absorbing medium, a layer of an ionic polymer is overlaid on the absorbing medium, and a layer incorporating an ionic surfactant is overlaid onto the polymer. The ionic surfactant also may be placed in a layer between the polymer and the absorbing medium. A preferred absorbing medium is silver bromide. Preferred polymers are copolymers of methacrylate, methacrylamide, acrylate, or acrylamide monomers in which at least one monomer is cationic and the others are nonionic. Preferred surfactants are anionic surfactants, in particular, a mixture of sodium di- and tri-isopropylnaphthalenesulfonates sold commercially as Alkanol.RTM. XC, and a sodium sulfosuccinate diester sold commercially as Aerosol.RTM. OT.
摘要:
A fixing solution having a pH.gtoreq.7 and comprising a fixing amount of sulfite and a fix accelerating amount of a thioether compound; wherein the fixing solution contains less than 0.05 moles/liter of thiosulfate and a method of processing an imagewise exposed and developed silver halide photographic element comprising fixing in said fixing solution a silver halide photographic element containing at least one emulsion or deposit of silver halide comprising greater than 90 mole % silver chloride.
摘要:
This invention relates to a composition of matter comprising associated predominantly silver nanoparticles, and a method of making the nanoparticles. It further relates to articles comprising the nanoparticles.
摘要:
The present invention relates to a method of particle separation comprising preparing a suspension of particles containing at least one recognizable target particle in a suspending solution, labeling the target particle with a conjugate marker, wherein the conjugate marker comprises at least one recognition unit for the recognizable target particle and at least one peroxidase enzyme, contacting a gelatin surface with the suspending solution, adding developer to the suspending solution in contact with the gelatin surface and in the presence of phenol to attach the target particle to the gelatin surface, and washing the gelatin surface to remove unattached particles. The method may also include detecting the presence of the target particle on the gelatin surface as well as detaching and recovering the attached particles after removal of the non-target particles.
摘要:
This invention relates to a method for processing a silver halide color photographic material comprising the steps of loading the material into a chamber adapted to hold the material therein; introducing a measured amount of a color developer solution into the chamber; developing the photographic material with the color developer solution; introducing into the chamber a measured amount of a processing solution which arrests development, without removing the color developer solution, to form a developer/stop solution mixture; processing the photographic material with the developer/stop solution mixture, substantially removing all of the developer/stop mixture solution from the chamber; then providing in the chamber a bleach/fixer solution mixture comprising a bleaching agent and a fixing agent; and processing the photographic material with the bleach/fixer solution mixture; wherein the color developer solution is utilized in the amount of greater than or equal to 375 ml/m2 of the photographic material that is processed; and wherein the total volume of solution or solution mixture for each processing stage is spread over the whole area of the photographic material in a repetitive manner to enable uniform processing.
摘要:
A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)—group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.
摘要:
This relates to a method of rendering a used photographic processing solution less corrosive to low carbon steel comprising: taking at least a used photographic processing solution containing a color developing agent and a used photographic processing solution containing a bleaching agent; delivering the used photographic processing solutions to a collection vessel to form a used photographic processing composition; and adjusting the pH of the used photographic processing composition to 6.5 to 11.
摘要:
The present invention relates to a processing system and method for processing photographic material. The processing system and method of the invention is adapted to recover water from humid air for reuse in the processor, as well as convert a liquid waste processing solution into a dry waste for disposal. In the system and method of the present invention, heated air is circulated through the processor and comes into contact with a cold surface to condense the heated air. The water resulting from this contacting of the heated air with the cold surface can be collected and recycled back to the processor for reuse in the processor. Further, waste solution can be absorbed by a matting material appropriately placed in the processor which evaporates the waste solution to a solid waste for subsequent disposal.
摘要:
Color photographic silver halide elements, such as color films, can be rapidly fixed using a fixing composition containing a thiosulfate fixing agent, and certain 1,3-thiazolidine-2-thiones. Each of the components is present in specific amounts to effect rapid and efficient desilvering. The composition also includes predominantly ammonium cations (at least 50 mol %). Besides effective and rapid silver removal (less than 60 seconds), the fixing composition also minimizes residual dye stain from sensitizing dye aggregates within the photographic elements.