Ricoh Company, Ltd.

Rioch Company, Limited

Ichiroh Fujii

Tomohiro Nakagawa

Naohiro Toda

Hidefumi Nagashima

Juichi Furukawa

Akihiko Matsuyama

Yuuki Yokohama

Kiyofumi Nagai

Yoshihiro Norikane

Akihiko Gotoh

Keishi Taniguchi

Hiroshi Iwata

Hisashi Habashi

Shigeo Hatada

Shigeru Kusakata

Hiroshi Gotou

Yohta Sakon

Keita Katoh

Hiroko Ohkura

Akira Izutani

Mariko Kojima

Takashi Tamai

Koji Katsuragi

Masahiro Kido

Hikaru Kobayashi

Masaki Kudo

Takumi Atake

Masaki Kudoh

A wiping method for wiping a nozzle surface of a liquid discharge head includes the step of relatively moving the liquid discharge head and a wiper impregnated with a cleaning fluid. The cleaning fluid contains a lactone compound in an amount of 5% by mass or more. The wiper includes a first layer configured to contact the nozzle surface and one or more layers other than the first layer. The first layer has a thickness of t, the one or more layers other than the first layer have a total thickness of t, and tis smaller than t. A void ratio of the first layer is smaller than a void ratio of at least one of the one or more layers other than the first layer.

Wiping method and image forming apparatus

Provided is a three-dimensional object producing method, including: a first step of forming a film by delivering a first liquid as a hydrogel precursor including at least a multifunctional monomer; and a second step of curing the film formed in the first step, wherein the first step and the second step are repeated a plurality of times.

Three-dimensional object forming liquid, three-dimensional object forming liquid set, three-dimensional object producing method, and three-dimensional object

Provided is an inkjet printing apparatus, satisfying elements (1) through (4) below, (1) the inkjet printing apparatus including an ink discharging unit configured to discharge an ink, (2) the ink discharging unit including an inkjet head having a nozzle diameter of 17 &#x3bc;m or greater but 19 &#x3bc;m or less, (3) the inkjet head including a nozzle plate and an ink repellent layer disposed on a surface of the nozzle plate, and (4) the inkjet printing apparatus using, as the ink, an aqueous dye ink including a water-soluble dye and having a viscosity of 5 mPa&#xb7;s or greater but 12 mPa&#xb7;s or less at 25&#xb0; C.

Inkjet printing apparatus and inkjet printing method

Three-dimensional object producing method

An aqueous ink for inkjet includes water, at least one hydrosoluble organic solvent each having a boiling point of 250&#xb0; C. or lower; vinyl polymer particles containing a pigment, and polycarbonate-based urethane resin particles, wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step.

Aqueous ink for inkjet, inkjet recording method, inkjet recorded matter, and inkjet recording device

A cleaning liquid for an inkjet recording apparatus is provided. The cleaning liquid includes an organic solvent having a boiling point of less than 250&#xb0; C. and no organic solvent having a boiling point of 250&#xb0; C. or more. The organic solvent having a boiling point of less than 250&#xb0; C. includes two or more methoxy-group-containing organic solvents and at least one of 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, and 2,3-butanediol.

Cleaning liquid for inkjet recording apparatus, method for cleaning inkjet recording apparatus, recording method, and cleaning and filling liquid

An inkjet ink, containing: water; a water-soluble organic solvent; a pigment; and polycarbonate urethane resin particles, wherein the water-soluble organic solvent contains 50% by mass or more of a diol compound, and wherein the water-soluble organic solvent contains 50% by mass or more of a water-soluble organic solvent having a boiling point of 200&#xb0; C. or less.

Inkjet ink, inkjet recording method and ink recorded matter

An ink contains a colorant, a water soluble organic solvent, a silicone-based surfactant, a compound represented by the following chemical formula 1, and water, wherein the water soluble organic solvent having a boiling point of 250&#xb0; C. or higher accounts for 38% by weight or less in a total amount of the water soluble organic solvent,  where Rand Reach, independently represent aliphatic hydrocarbon groups having 3 to 6 carbon atoms with forks and Rand Reach, independently represent alkyl groups having one to two carbon atoms, and n represents an integer of from 1 to 6.

Ink, inkjet recording method, ink cartridge, recorded matter, and inkjet recording device

An ink for inkjet recording, including: water; a water-soluble organic solvent; a pigment; and resin particles, wherein 50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200&#xb0; C., and the water-soluble organic solvent having a boiling point of lower than 200&#xb0; C. comprises 3-methoxy-3-methyl-1-butanol.

Ink for inkjet recording and recording method therewith

An inkjet recording method includes ejecting an ink having a temperature from 28&#xb0; C. to 40&#xb0; C. and attaching the ink to a non-porous substrate having a temperature 5&#xb0; C. to 20&#xb0; C. higher than that of the ink, wherein the ink contains a colorant, resin particles, water, a hydrosoluble organic solvent, and a silicone-based surfactant, wherein the silicone-based surfactant accounts for 1% by weight to 3% by weight in the ink.

Inkjet recording method, inkjet recorded matter, and inkjet recording device

An aqueous ink for inkjet includes water; a hydrosoluble organic solvent; a pigment; and a particulate resin. The hydrosoluble organic solvent includes 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40.

Aqueous ink for inkjet, inkjet recorder and inkjet recording method

An inkjet recording method includes recording an image on a heated nonpermeable substrate with an aqueous ink by an inkjet method; and drying the aqueous ink,

Inkjet recording method and inkjet recorder

Aqueous ink for inkjet that contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent comprises 2,3-butane diol having a total ratio of (2R, 3R) form and (2S, 3S) form of greater than 50% by weight in 2,3-butane diol, where (2R, 3R) form represents (2R, 3R)-(&#x2212;)-2,3-butane diol and (2S, 3S) form represents (2S, 3S)-(+)-2,3-butane diol, wherein 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.

Aqueous ink for inkjet, ink cartridge, and inkjet recording device

An inkjet ink including: water; a water-soluble organic solvent; a pigment; polycarbonate modified urethane resin particles; an ultraviolet absorber; and a light stabilizer.

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Kanagawa, Japan

Ichiroh Fujii