Ricoh Company, Ltd.

Hokuetsu Kishu Paper Co., Ltd.

Michihiko Namba

Kiyofumi Nagai

Akihiko Gotoh

Tomoyuki Shimada

Chiaki Tanaka

Mariko Kojima

Takashi Tamai

Hiroaki Takahashi

Naoya Morohoshi

Kazukiyo Nagai

Akiko Bannai

Masayuki Shoshi

Hisashi Habashi

Tohru Ohshima

Kaoru Tadokoro

Shinichi Kawamura

Tomohiro Inoue

Hidetoshi Fujii

Akihiko Matsuyama

Hiroshi Gotou

Amika Sagara

Yuta Nakamura

Hidefumi Nagashima

Kiminori Masuda

Shosuke Aoai

Tamotsu Aruga

Tsutomu Maekawa

Masahiro Kido

Hikaru Kobayashi

Masayuki Koyano

Yuuki Yokohama

Shizuka Kohzuki

Shinya Seno

Naoto Shimura

Takahiro Yoshida

Yoshiki Yanagawa

Shigeyuki Harada

Yuusuke Koizuka

Akiyoshi Sabu

Juichi Furukawa

Toshiroh Tokuno

Masayuki Fukuoka

Takuya Yamazaki

Manabu Arita

Masaaki Tsuda

Satomi Araki

Mayumi Yoshihara

Yukihiro Imanaga

Shohsuke Aoai

Daiki Hasebe

Kiyofumi Nagal

Hisanori Sakatsume

Shuichi Oguma

Atsushi Hasegawa

Akihiko Bon Maison Honatsugi 701 Gotoh

An ink contains water, a coloring material, a resin, and an organic solvent, wherein the dried layer of the ink has a surface free energy γhaving a polar component γof from 3.5 to 20 J/mat 25 degrees C.

Ink, image forming apparatus, and image forming method

An active energy ray-curable composition is provided which comprises a polymerizable monomer, a polysilane compound containing a phenyl group in a repeating unit, and a photopolymerization initiator.

Active energy ray-curable composition, active energy ray-curable ink, composition storing container, two-dimensional or three-dimensional image forming device, method for producing cured product, and cured product

An ink is provided. The ink includes a colorant, an organic solvent, a resin particle including an anionic urethane resin, and an organic amine compound having a boiling point in the range of from 120&#xb0; C. to 200&#xb0; C. and a molecular weight of 100 or less, and water, and the mass ratio of the organic amine compound to the resin particle is in the range of from 0.01 to 1.00.

Ink, image forming method, image forming apparatus, and image formed product

An ink set includes an ink A including water, an organic solvent A, a self-dispersible pigment, an anionic resin particle, and an amine compound having a boiling point of 120 degrees C.-200 degrees C. and an ink B including water, an organic solvent B, and a resin-coated pigment, wherein when the mass content of the amine compound is determined as 1, the mass content of the anionic resin particle is 1-100 and the mass content of the resin-coated pigment is 10-200, while the mass content of the anionic resin particle and the mass content of the resin-coated pigment are respectively based on the content per unit of mass of the ink A and the content per unit of mass of the ink B.

Ink set, image forming method, and image forming apparatus

An inkjet recording device includes an ink, a discharging head to discharge the ink to a recording medium, and a cleaning liquid, wherein the ink comprises water, a urethane resin having a glass transition temperature of 0 degrees C. or lower, a pigment, a compound represented by the following Chemical formula 1, and a surfactant, 

Inkjet recording device, cleaning method, and set of ink and cleaning liquid

An ink includes a pigment, a wax, a water soluble solvent including a solvent having an SP value of from 9.0 to 11.0, and water, wherein the mass ratio of the content of the wax in the ink to the content of the solvent having an SP value of from 9.0 to 11.0 is in a range of from 1.0:2.5 to 1.0:25.0.

Ink, ink container, inkjet recording device, and recorded matter

A cleaning liquid for rinsing an ink adhering to an article includes water and a first organic solvent, wherein a liquid mixture of the water and the first organic solvent has a Hansen solubility parameter including a hydrogen bond term of 10.0 (cal/cm)or less, wherein the ink includes water, a second organic solvent, a polyurethane resin particle, and a polysiloxane surfactant having an HLB value of 8 or less, wherein the polyurethane resin particle accounts for 5 percent by mass or more of a total amount of the ink.

Cleaning liquid, container, inkjet printing method, inkjet printing device, and set of ink and cleaning liquid

Provided is an ink including: a coloring material; an organic solvent; resin particles; an amine compound; and water, wherein the resin particles include urethane resin particles, and urethane-modified acrylic resin particles including a core portion containing an acrylic resin and a shell portion formed on a surface of the core portion and containing at least a urethane resin, and wherein the amine compound has a boiling point of 120 degrees C. or higher but 200 degrees C. or lower and a molecular weight of 100 or less.

Ink, ink stored container, image forming method, liquid discharging apparatus, and image

A processing fluid contains a water soluble cation polymer having a quaternary ammonium cation in the main chain, either of one of phosphoric acid-based inorganic salt and p-tert-butyl benzoate, and water, wherein the phosphoric acid-based inorganic salt is either of one of disodium monohydrogen phosphate, sodium dihydrogen phosphate, sodium polyphosphate, dipotassium monohydrogen phosphate, and potassium dihydrogen phosphate, wherein the water soluble cation polymer accounts for 40% by weight to 60% by weight.

Processing fluid, image forming method, recorded matter, and inkjet recording device

An ink including: water; at least one organic solvent; a polysiloxane surfactant; and acryl-silicone resin particles, where the polysiloxane surfactant has an HLB value of 8 or less.

Ink, inkjet printing apparatus, inkjet printing method, and printed matter

A white ink containing one or more organic solvents including 40 percent by mass or more of an amide compound of formula 1 is provided: wherein, Rrepresents a straight-chained or branch-chained alkyl group having one to six carbon atoms, Rand Reach, independently represent hydrogen atoms or straight-chained or branch-chained alkyl groups having 1 to 4 carbon atoms.

White ink, ink set, recording method, ink container, and inkjet recording device

An inkjet recording method includes applying one or more drive pulses to a pressure generating device of a recording head including a nozzle plate, a liquid chamber, and discharging droplets of ink from the nozzle. Also, the following conditions 1 and 2 are satisfied. 1. The ink has a dynamic surface tension 10 mN/m or more greater than the static surface tension of the ink when the surface life length is 15 ms and 3 mN/m or more greater than the static surface tension of the ink when the surface life length is 1,500 ms, as measured by maximum bubble pressure technique at 25 degrees C. 2. At least one of the drive pulses has a voltage changing portion to draw in the ink, the voltage changing portion having a changing time of one third or more of the resonance period of the liquid chamber.

Inkjet recording method and inkjet recording device

A cleaning filling liquid for inkjet device including water; 10.0% by mass to 45% by mass per whole amount of the cleaning filling liquid of an amide compound having following formula (1). 

Cleaning filling liquid, cartridge, cleaning filling method, and inkjet recording device

To provide an image forming method, including applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer; drying the recording medium on which the pre-treatment liquid has been applied; and forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.

Image forming method, image forming apparatus, and recorded matter

An overcoating liquid contains a hydrodispersible polyurethane; a compound represented by Chemical formula 1: CF&#x2014;CHCHO(CHCHO)H, where n represents an integer of from 1 to 40; a compound represented by Chemical formula 2: HORRC&#x2014;(CH)&#x2014;CRROH, where Rand Reach, independently represent alkyl groups having three to six carbon atoms, Rand Reach, independently represent methyl groups or ethyl groups, and n represents an integer of from 1 to 6; and water, wherein the overcoating liquid is applied to the surface of a recording medium onto which inkjet ink is already discharged.

Overcoating liquid, ink set, image forming method, and image forming apparatus

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Kanagawa, Japan

Michihiko Namba