Abstract: A method for the preparation of silicium dioxide dispersions is provided, wherein the surface of the silicium dioxide is modified by a treatment with the reaction products, formed in a separate reaction step, of at least one compound of trivalent aluminum or of tetravalent zirconium or a mixture thereof with at least one aminoorganosilane; and the invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: A method for the preparation of silicium dioxide dispersions is provided, wherein the surface of the silicium dioxide is modified by a treatment with the reaction products, formed in a separate reaction step, of at least one compound of trivalent aluminum or of tetravalent zirconium or a mixture thereof with at least one aminoorganosilane; and the invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: A method for the preparation of silicon dioxide dispersions is described, wherein the surface of the silicon dioxide is modified by a treatment with the reaction products of a compound of trivalent aluminum with least one aminoorganosilane. These reaction products are formed in a separate reaction step. The present invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: A method for the preparation of silicon dioxide dispersions is described, wherein the surface of the silicon dioxide is modified by a treatment with the reaction products of a compound of trivalent aluminum with least one aminoorganosilane. These reaction products are formed in a separate reaction step. The present invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: A method for the preparation of silicium dioxide dispersions is provided, wherein the surface of the silicium dioxide is modified by a treatment with the reaction products, formed in a separate reaction step, of at least one compound of trivalent aluminum or of tetravalent zirconium or a mixture thereof with at least one aminoorganosilane; and the invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: A method for the preparation of silicon dioxide dispersions is described, wherein the surface of the silicon dioxide is modified by a treatment with the reaction products of a compound of trivalent aluminum with least one aminoorganosilane. These reaction products are formed in a separate reaction step. The present invention also relates to recording sheets for ink jet printing having such a dispersion incorporated in an ink-receiving layer.

Abstract: An apparatus for liquid-processing light-sensitive sheets comprises a processing dish preferably with a horizontal intermediate bottom. The upper side of the intermediate bottom constitutes the lower, and the underside of a lid covering the dish the upper, wall of a passage-gap through which the sheets are transported by pairs of conveying-and-squeezing rollers. The downstream dish sidewall, taken in sheet-transportation direction, is provided near its foot with a horizontal row of injection-nozzles for processing liquid. The dish sidewall opposite the nozzle-bearing sidewall bears a horizontally extending ledge or appropriate flow-reversing configuration effecting 180.degree. reversal of the direction of liquid flow from underneath the intermediate bottom to above the profiled bottom-surface and toward the nozzle-bearing sidewall, generating a liquid stream through the passage-gap in the sheet-transportation direction.

Abstract: The processing time of exposed photographic silver dye bleach materials is shortened by using a bleach preparation which contains a strong acid, a water-soluble iodide, a water-soluble organic nitro compound, an anti-oxidizing agent, a bleach catalyst, an organic photographic developing agent and/or a benzotriazole derivate.

Abstract: A method for processing silver dye-bleach materials, with the process measures silver developing, dye bleaching, silver bleaching and fixing, wherein the silver and dye bleaching can be combined in a single treatment step is provided. For the silver bleaching or the combined dye and silver bleaching an acid formulation is used which has a pH value of at most 2 and contains a strong acid, a water-soluble iodide, optionally a water-soluble organic nitro compound, a non-quaternised quinoxaline or pyrazine, an anti-oxidant and at least one quaternary ammonium salt or a protonated tertiary organic nitrogen base. By this method the processing time can be shortened without impairing the quality of the colored images obtained.