147results about How to "High print density" patented technology

Disclosed is an aqueous ink comprising at least water, a plurality of water-soluble organic solvents and a coloring material. The coloring material is a pigment, and, it contains a pigment particle having at least one ionic group bonded to a surface of the pigment particle directly or via another atomic group. The plurality of water-soluble organic solvents have a good medium or good mediums for the pigment and a poor medium or poor mediums for the pigment. The poor medium does not solvate perfectly or substantially the pigment. The ionic group undergoes perfectly or substantially no ionic dissociation in the poor medium. Also, among the respective Ka values of the plurality of water-soluble organic solvents as determined by the Bristow method, the Ka value of the poor medium is maximum.

The present invention aims to provide an ink jet black ink which can improve weatherability, optical density and sticking recovery property of nozzles of a recording head. According to the present invention, an ink jet black ink is provided which comprises at least a coloring-material and a water-soluble organic solvent, wherein the coloring material is a compound represented by the following general formula (I) or a salt thereof, and the water-soluble organic solvent is a water-soluble organic solvent having a relative permittivity of from 30.0 or more to less than 70.0 at 20° C. and capable of dissolving the compound represented by the following general formula (I) or a salt thereof, by 1.0 mass % or more at 25° C., and is in a content of 50.0 mass % or more with respect to the total content of all water-soluble organic solvents contained in the ink jet black ink

On ink jet recorded matter comprising an ink jet recording medium having a substrate and an ink receiving layer formed thereon containing porous inorganic particles and an image formed with a pigment ink on the ink receiving layer, a protective layer covering the image is formed by thermally transferring a transfer layer from a heat-resistant carrier onto the image. The ink jet recording medium comprises a substrate and an ink receiving layer formed on one side of the substrate, wherein an ink jet recorded image and a protective layer covering the image are to be formed on the surface of the ink receiving layer, said side of the substrate, before the formation of the ink receiving layer, having a Bekk's surface smoothness of 200 seconds or higher and the surface of the ink receiving layer having a Bekk's surface smoothness of 60 seconds or higher. Also disclosed is an ink jet recording medium having no ink receiving layer, which comprises a substrate treated with a solution of a metal salt and in which the front and back sides of the substrate each have a Bekk's surface smoothness of 200 seconds or higher.

An inkjet printing apparatus includes an edge detecting unit adapted to detect an edge portion or a non-edge portion in the image data a memory adapted to store a plurality of edge reducing masks used to reduce image data in the edge portion and a plurality of non-edge reducing masks used to reduce image data in the non-edge portion; a reduced data generating unit adapted to generate multiple sets of edge reduced data from image data in the edge portion using the plurality of edge reducing masks and to generate multiple sets of non-edge reduced data from image data in the non-edge portion using the plurality of non-edge reducing masks; and a printing data generating unit adapted to generate multiple sets of printing data by combining the multiple sets of edge reduced data and the multiple sets of non-edge reduced data.

An inkjet printing apparatus includes an edge detecting unit adapted to detect an edge portion and a non-edge portion in the image data; a memory adapted to store a plurality of edge reducing masks used to reduce image data in the edge portion and a plurality of non-edge reducing masks used to reduce image data in the non-edge portion; a reduced data generating unit adapted to generate multiple sets of edge reduced data from image data in the edge portion using the plurality of edge reducing masks and to generate multiple sets of non-edge reduced data from image data in the non-edge portion using the plurality of non-edge reducing masks; and a printing data generating unit adapted to generate multiple sets of printing data by combining the multiple sets of edge reduced data and the multiple sets of non-edge reduced data.

A process for producing a coated sheet, in which there can be formed a coating layer simultaneously attaining an ink absorption rate and coating film cracking control suitable for use as an inkjet recording layer, in particular, there can be realized high gloss, high ink absorption, high printing density and high image quality required for use as a glossy inkjet recording sheet. There is provided a process for producing a coated sheet, comprising coating a support, or undercoat layer superimposed on the support, with a coating liquid containing a thermosensitive polymeric compound reversibly exhibiting hydrophilicity and hydrophobicity depending on temperature change, characterized in that the coating liquid containing a thermosensitive polymeric compound is applied concurrently with application of a treatment liquid whose temperature is in the range in which the thermosensitive polymeric compound exhibits hydrophilicity, or after the application of the treatment liquid without drying after the application.

An azo compound represented by the following Formula (1) or a salt thereof, and an ink composition comprising the same(wherein, each of R1, R2, R5, R6 and R7 independently represents a hydrogen atom, a carboxyl group, a sulfo group and the like, each of R3 and R4 independently represents a hydrogen atom, a sulfo group, a nitro group, a (C1 to C4) alkyl group (which may be substituted by a hydroxyl group or a (C1 to C4) alkoxy group), a (C1 to C4) alkoxy group (which may be substituted by a hydroxyl group, a (C1 to C4) alkoxy group, a sulfo group or a carboxyl group) and the like, and n represents 0 or 1, respectively).

The invention discloses multifunctional double-printing-head 3D printing equipment based on the 3DP technology in the field of 3D printing equipment. The equipment comprises a first feeding hopper and a second feeding hopper, the first feeding hopper and the second feeding hopper are arranged on a rack, a first mixing bowl is arranged below the first feeding hopper, a second mixing bowl is arranged below the second feeding hopper, a powder spreading device is arranged below the first mixing bowl and the second mixing bowl, a working box is arranged below the powder spreading device, and a lifting platform is arranged in the working box. A first feeding opening and a second feeding opening are formed in the two ends of the powder spreading device respectively, the first feeding opening corresponds to the first mixing bowl, and the second feeding opening corresponds to the second mixing bowl. The powder spreading device is arranged on a powder spreading device guide rail, a printing head guide rail is arranged above the powder spreading device, a first printing head and a second printing head are arranged on the two sides of the printing head guide rail, and the orthographic projection trajectory of the powder spreading device, the first printing head and the second printing head covers the whole lifting platform in the moving process. In the working process, the first printing head or the second printing head can be selected for working, a sand mould can be printed out, a mould also can be printed out, the equipment can achieve two purposes, and the equipment cost is reduced.

Azo compounds represented by general formula (1) or salts thereof are provided as highly water-soluble colorants which have hues of yellow, orange, brown or red, and excellent color development properties and which, when used in various recording processes, particularly in an inkjet recording process, ensure various excellent fastnesses such as light fastness, ozone fastness, and fading balance. Ink compositions containing the colorants are also provided. In general formula (1), R1 to R8 are each independently a hydrogen atom, C1-4 alkyl, C1-4 alkoxy, or the like; and X is C1-8 alkylenediamino, xylylenediamino, or the like.

The present invention provides a method for manufacturing an inkjet recording medium having at least applying, on a support, a coating liquid A, a coating liquid B and a coating liquid C in this order from the support to form an ink receiving layer. The coating liquid A contains at least a crosslinking agent. The coating liquid B contains at least a vapor-phase-process silica and a water-soluble binder, in which the content of a pseudo boehmite alumina hydrate with respect to the content of the vapor-phase-process silica in the coating liquid B is less than 3% by mass, and the content of a crosslinking agent with respect to the content of the vapor-phase-process silica in the coating liquid B is less than 3% by mass. The coating liquid C contains at least a pseudo boehmite alumina hydrate and a water-soluble binder.

An inkjet recording element comprising a porous ink-receiving layer having interconnecting voids is disclosed in which an upper surface of the ink-receiving layer has been subjected to plasma treatment, and wherein the upper surface of the ink-receiving layer, prior to the plasma treatment, has a measured carbon elemental content of at least 40 percent. The invention can provide increased dot spread.