Abstract: An ink-jet printer head is characterized by comprising an organic film coated on the surface of the nozzle plate for discharging ink, in which solid particles having abrasion resistance are dispersed, and a water-repellent film on the surface of the organic film, in which the chains of fluorocarbon polymer is grown. The head shows improved durability of the chains of the fluorocarbon polymer on the nozzle plate during cleaning of the nozzle surface.

Abstract: Ink jet recording is performed using an ink that is adjusted such that the thickness dependence rate determined by dividing the difference in optical density between images having an ink layer thickness of 30 ?m and 15 ?m by the ink layer thickness difference of 15 ?m is less than 0.043 per unit layer thickness of 1 ?m or ?Eab* between the same hues is 8 or less.

Abstract: A three-dimensional laminating molding device includes ejection heads that eject support material for a support, and an ejection head that ejects mold material for a mold. The support material is sold at room temperature. An inner temperature of the laminating molding device during the laminating molding is controlled to a range of (a melting point of the support material?30)° C. to (the melting point of the support material?5)° C.

Abstract: Ink jet recording is performed using an ink that is adjusted such that the thickness dependence rate determined by dividing the difference in optical density between images having an ink layer thickness of 30 ?m and 15 ?m by the ink layer thickness difference of 15 ?m is less than 0.043 per unit layer thickness of 1 ?m or ?Eab* between the same hues is 8 or less.

Abstract: An ink-jet printer head is characterized by comprising an organic film coated on the surface of the nozzle plate for discharging ink, in which solid particles having abrasion resistance are dispersed, and a water-repellent film on the surface of the organic film, in which the chains of fluorocarbon polymer is grown. The head shows improved durability of the chains of the fluorocarbon polymer on the nozzle plate during cleaning of the nozzle surface.

Abstract: A three-dimensional laminated mold is formed by ejecting a mold material into a groove formed in a support. The support is formed from a support material ejected from an inkjet head. The support material has a ratio of density difference of equal to or less than 13.5%. The ratio of density difference is calculated from an equation: ratio of density difference=((D1-D2)/D1)×100 wherein D1 indicates the density of the support material at 20° C., and D2 indicates the density of the support material at a temperature at which a viscosity of the support material measured using a rotational viscometer falls within the range of 10±1 mPa·s.

Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.

Abstract: A three-dimensional laminating molding device includes ejection heads that eject support material for a support, and an ejection head that ejects mold material for a mold. The support material is sold at room temperature. An inner temperature of the laminating molding device during the laminating molding is controlled to a range of (a melting point of the support material—30)° C. to (the melting point of the support material—5)° C.

Abstract: An inkjet head selectively ejects recording ink droplets and refresh ink droplets. The recording ink droplets are deflected so as to impinge on target locations on a recording medium, thereby forming recording dots thereon. On the other hand, the refresh ink droplets are deflected so as to impinge on an ink absorbing member. The ink clinging on the ink absorbing member is collected into an ink tank and reused. The ink absorbing member functions as a filter for preventing impurities being collected into the ink tank along with the ink.

Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.

Abstract: An ink composition for use in an on-demand inkjet printer capable of printing on plain paper at a recording rate of 10 ips or higher, which ink composition comprises at least a pigment and non-pigment components including at least water and a thickening agent and shows a weight loss ratio at 25° C. and 60 RH % for 30 minutes of 5 to 25% based on the total weight of the ink. Also disclosed is an on-demand inkjet recording process using the ink composition.

Abstract: An inkjet head selectively ejects recording ink droplets and refresh ink droplets. The recording ink droplets are deflected so as to impinge on target locations on a recording medium, thereby forming recording dots thereon. On the other hand, the refresh ink droplets are deflected so as to impinge on an ink absorbing member. The ink clinging on the ink absorbing member is collected into an ink tank and reused. The ink absorbing member functions as a filter for preventing impurities being collected into the ink tank along with the ink.

Abstract: An ink jet printer which performs recording by allowing an ink droplet to be attached to plain paper, characterized in that there is used an ink composition comprising at least water, a pigment and a water-soluble organic solvent which exhibits a weight loss of from 10% to 40% based on the total weight of ink, a 25° C. surface tension increase of not smaller than 1 mN/m from the initial value and a viscosity change of not greater than 150% of the initial value after 24 hours of aging at a temperature of 25° C.

Abstract: When a solid ink printing master plate is constructed by liquefying by heating an ink composition which exists as a solid at room temperature, imparting some jet energy thereto thereby jetting out ink droplets, and then fixing the thus spattering ink droplets onto a substrate, the adhesion strength between the ink composition and the substrate is controlled to 25 g/mm2 or more.

Abstract: An ink composition for use in an on-demand inkjet printer capable of printing on plain paper at a recording rate of 10 ips or higher, which ink composition comprises at least a pigment and non-pigment components including at least water and a thickening agent and shows a weight loss ratio at 25° C. and 60 RH % for 30 minutes of 5 to 25% based on the total weight of the ink. Also disclosed is an on-demand inkjet recording process using the ink composition.

Abstract: A hot-melt ink composition comprising at least one composition of: (a) a cyan ink composition containing a cyan pigment as a colorant, wherein the cyan ink composition shows a maximum chroma C* on a recording medium of 45 or higher, a hue angle H0 at the maximum chroma of from 240° to 270° and a color difference &Dgr;E* of 3 or smaller as measured through 100-hour irradiation with xenon lamp light at a luminous energy of 0.35 W/m2 and a wavelength of 340 nm; (b) a yellow ink composition containing a yellow pigment as a colorant, wherein the yellow ink composition shows a maximum chroma C* on a recording medium of 70 or higher, a hue angle H0 at the maximum chroma of from 90° to 110° and a color difference &Dgr;E* of 5 or smaller as measured through 100-hour irradiation with xenon lamp light at a luminous energy of 0.

Abstract: A hot-melt ink composition adapted for an ink jet recording process comprising the steps of: heating an ink composition which stays as solid at room temperatures so that it is liquefied; and then applying some jetting energy to the ink composition so that it is jetted onto a recording medium in the form of ink droplet to form a recorded dot, wherein said ink composition comprises a pigment and an alcoholic wax having a hydroxyl value of from 20 to 150 and has a melt viscosity of from 5 to 30 mPa.s upon the use thereof.