Ricoh Company, Ltd.

Terumo Kabushiki Kaisha

Hiroshi Gotou

Hidetoshi Fujii

Yuuki Yokohama

Kiyofumi Nagai

Akihiko Matsuyama

Yasuo Kurosaki

Keita Katoh

Hiromi Sakaguchi

Michihiko Namba

Tomohiro Inoue

Takashi Watanabe

Masayuki Fukuoka

Shigeyuki Harada

Kaori Toyama

Takahiro Yoshida

Akihiko Gotoh

Kazuhiko Umemura

Yoshiki Yanagawa

Yuusuke Koizuka

Juichi Furukawa

Masayasu Nonogaki

Tsutomu Maekawa

Tomoyuki Shimada

Kazukiyo Nagai

Tomohiro Nakagawa

Tamotsu Aruga

Yuta Nakamura

Shun Saito

Akiyoshi Sabu

Yukio Otome

Takeshi Shibuya

Hidefumi Nagashima

Ichiroh Fujii

Takashi Tamai

Koji Katsuragi

Hideaki Nishimura

Eisuke Furuichi

Masahiko Ishikawa

Mio Kumai

Taku Hatakeyama

Kaoru Tadokoro

Ayaka Tanaka

Sho Oyamatsu

Yukiko Takamura

Takuya Yamazaki

Toshiyuki Kobashi

Shinya Seno

Keiko Yamashita

Shigenori Nozawa

Masaki Kudo

Tomohiro Hirade

Amika Sagara

Katsumi Morimoto

Daisuke Ozaki

Itsuro Sasaki

Naoto Shimura

Koichiro Oyama

Kohta Akiyama

Shosuke Aoai

Atsufumi Hanazawa

Yukitaka Watarai

Yoshiaki Masuda

Sayuri Kojima

Takuya Saiga

Shunsuke Horie

Hiroaki Kasukawa

An ink discharging device contains an ink containing an organic solvent with an SP value of from 9.0 to 12.0, a white pigment, a polyurethane resin with a glass transition temperature Tg of 0 degrees C. or lower, and water, and an ink discharging unit including a nozzle plate including a liquid repellent layer containing a silicone resin, the ink discharging unit for discharging the ink, wherein the proportion of the organic solvent to the entire of the ink is from 0.5 to 2.5 percent by mass and the proportion of the white pigment to the entire of the ink is from 6 to 15 percent by mass.

Ink discharging device, method of discharging ink, method of manufacturing ink-discharged matter, white ink, and set

A set of inkjet inks used for forming an image by application of an ink on a cloth is provided. The set includes an ink and a pre-processing fluid. The pre-processing fluid contains water, a compound that flocculates an anionic compound, and at least one emulsified sizing agent.

Set of inkjet inks, inkjet image forming method, and inkjet image forming apparatus

Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.

Ink set, printer, and printing method

An ink contains an anionic compound, water, a photoacid generator, and one or more organic solvents containing at least one organic solvent having a solubility parameter of from 9 to 11.8 (J/cm).

Ink, ink set, ink container, method of printing, and printing device

An ink contains water, an organic solvent, a polyurethane resin, and a cyclic ester including a structure represented by Chemical formula I, wherein the proportion of the cyclic ester having a crystal having a particle diameter of 1 &#x3bc;m or greater is less than 4 ppm of the total of the ink after the ink is allowed to stand at a temperature range of from 20 to 30 degrees C. for 30 days. 

Ink, method of manufacturing ink, printing method, and printing device

An ink contains at least one kind of polyether-modified siloxane compound and at least one kind of aliphatic alcohol alkylene oxide compound.

Ink, ink set, ink container, image forming method, and image forming apparatus

An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-&#x3b2;-buthoxy propionamide, N,N-dimethyl-&#x3b2;-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.

Ink set, recording device, and method of recording

A method for printing is provided including: applying a pretreatment liquid containing a compound that aggregates an anionic compound on a print medium, and applying an ink containing water, an organic solvent, and a resin particle on the print medium to which the pretreatment liquid has been applied. The resin particle includes a polyurethane resin particle. The ink contains a cyclic ester having a structure represented by the following general formula (I). After the ink is left to stand and stored under a room temperature environment (25&#xb1;5&#xb0; C.) for a month, a rate of content of crystals of the cyclic ester having a particle diameter of 1 &#x3bc;m or larger in the ink is lower than 4 ppm. 

Method for printing and printer

An ink including water, an organic solvent, and a polyurethane resin particle is provided. A rate of content of a compound having a molecular weight of 1,000 or less and having a structure represented by the following general formula (I) in the ink is 10 ppm or less. 

Ink, method for producing ink, method for printing, and printer

A printing method includes discharging a first white ink comprising a first white pigment and a second white ink containing a second white pigment by a discharging head, wherein the following relationship is satisfied: |R&#x2212;R|&#x2265;0.5, where Rrepresents a refractive index of the first white pigment and Rrepresents a refractive index of the second white pigment.

Printing method, printing device, and printed matter

An ink set comprises black ink having a static surface tension A and yellow ink having a static surface tension B, wherein the static surface tension A is 28.7 mN/m or more and greater than the static surface tension B, wherein the ink set is used in an image forming device including an inkjet head including a nozzle plate including a first nozzle array and a second nozzle array disposed adjacent to the first nozzle array, the first nozzle array including multiple first nozzles configured to discharge the black ink and a second nozzle array including multiple second nozzles configured to discharge the yellow ink wherein each nozzle of the multiple first nozzles and the multiple second nozzles has a cylindrical portion having a length of 25 &#x3bc;m or longer along an axial direction with an opening on an ink discharging side of the nozzle plate.

Ink set and image forming device

An ink, includes water; a coloring material; and a cross-linked copolymer having a structure unit represented by the following Chemical formula 1, and a structure unit represented by the following Chemical formula 2, 

Ink, ink cartridge, image forming method, and printed matter

A liquid discharge apparatus includes a conveyance path, a liquid discharge head, and a drying device. A medium is to be conveyed on the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed on the conveyance path. The conveyance path includes a switchback path and an ejection path. The switchback path switches back a conveyance direction of the medium onto which the liquid has been discharged. The ejection path conveys the medium onto which the liquid has been discharged to an ejection port. The drying device dries the medium both on the switchback path and on the ejection path.

Liquid discharge apparatus

A liquid discharge apparatus includes a conveyance path, a liquid discharge head, an ejection tray, and a drying device. A medium is conveyed in the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed in the conveyance path. The medium is ejected to the ejection tray. The drying device dries the medium. The conveyance path includes a first bending portion to bend the medium, with a liquid-applied surface of the medium facing inward. The ejection tray includes a second bending portion to bend the medium, with the liquid-applied surface of the medium facing inward. A curvature of the medium bent by the first bending portion is greater than a curvature of the medium bent by the second bending portion. The drying device dries the medium conveyed in the first bending portion.

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Kanagawa, Japan

Hiroshi Gotou