Ricoh Company, Ltd.

Akiko Bannai

Tetsuya Kaneko

Tomohiro Nakagawa

Kiyofumi Nagai

Akihiko Gotoh

Toshiroh Tokuno

Mariko Kojima

Tadashi Hayakawa

Tomomi Katoh

Masahiro Kuwata

Shotaro Takeuchi

Masanori Kusunoki

Ikoh Soh

Michihiko Namba

Masayuki Koyano

Shizuka Kohzuki

Hiroaki Takahashi

Akihiko Matsuyama

Tomohiro Inoue

Hitoshi Arita

Kakuji Murakami

Kiminori Masuda

Nobutaka Osada

Tomoko Maeda

Takashi Tamai

Yohta Sakon

Yuta Nakamura

Hisashi Habashi

Akio Kojima

Hiroko Ohkura

Naoko Kitaoka

Naoto Shimura

Takanori Tsuyuki

Takumi Atake

Hiroyuki Mochizuki

Ikuko Tanaka

Keita Katoh

Eisuke Hori

Hidefumi Nagashima

Yuuki Yokohama

Hiroshi Gotou

Masato Igarashi

Masahiro Kido

Tsutomu Maekawa

Tomohiko Kohda

Hikaru Kobayashi

Masaki Kudo

Mio Akima

Kohta Akiyama

Yukiko Ishijima

Masaki Kudoh

Yukiko Takamura

A liquid composition contains a coloring material, an organic solvent, a compound represented by Chemical Formula 1 below, a resin, and water, wherein the contact angle of water against a liquid composition film formed by attaching the liquid composition to a non-permeable printing medium is 60 degrees or less,

Liquid composition, liquid discharging device, and method of manufacturing liquid composition

An inkjet printing device including: an ink storage unit configured to store an ink; an ejection head having a nozzle configured to eject the ink to a printing material; a heating unit configured to heat the printing material; and a washing unit configured to wash a nozzle-formed surface of the head with a washing liquid, wherein the ink is a clear ink including a resin, the device has a low gloss printing mode that is a printing mode for applying low gloss and a high gloss printing mode that is a printing mode for applying high gloss, and the inkjet printing device satisfies: T&#x3e;Twhere T(degrees Celsius) is a temperature of the heating unit when printing is performed with the low gloss printing mode, and T(degrees Celsius) is a temperature of the heating unit when printing is performed with the high gloss printing mode.

Inkjet printing device and inkjet printing method

Inkjet printing apparatus including: ink accommodating unit storing ink; ejection head configured to eject the ink to form print layer; and heating unit configured to heat print target, wherein the ink is clear ink including resin and water, dry film of the clear ink has glass transition temperature of 50&#xb0; C. or more, the inkjet printing apparatus has first printing mode and second printing mode, and the heating unit is configured to heat the print target so that expression: T&#x3e;Tis satisfied, where the Tis temperature (&#xb0; C.) of the print target in printing region printed in the first printing mode obtained when the clear ink is deposited on the print target, and the Tis temperature (&#xb0; C.) of the print target in printing region printed in the second printing mode obtained when the clear ink is deposited on the print target.

Inkjet printing apparatus, inkjet printing method, and method for controlling glossiness of print image

Provided is a cleaning solution including: water; a compound represented by general formula (1) below; a glycol ether solves in an amount of greater than 5 g in 100 g of water having a temperature of 25 degrees C., and a proportion of the glycol ether compound is 1 percent by mass or greater but 30 percent by mass or less, and wherein in general formula (1) below, Rrepresents an alkyl group containing 1 or more but 4 or less carbon atoms. 

Cleaning solution, set of ink and cleaning solution, cleaning method, cleaning apparatus, printing method, and printing apparatus

A liquid discharging device includes a liquid discharging head including a nozzle and having a nozzle forming surface, the liquid discharging head configured to discharge a liquid through the nozzle, a wiping member configured to wipe the nozzle forming surface, the wiping member having a first layer configured to be brought into contact with the nozzle forming surface and at least one more layer, and a cleaning liquid that is applied to the nozzle forming surface, wherein the static surface tension of the cleaning liquid is greater than the static surface tension of the liquid.

Liquid discharging device and wiping method

A wiping device includes a wiping member configured to wipe a nozzle forming surface of a liquid discharging head that discharges a liquid from a nozzle, the wiping member having a first layer configured to be brought into contact with the nozzle forming surface and at least one more layer, and a cleaning liquid that is applied to the nozzle forming surface, the cleaning liquid containing a compound represented by the following Chemical formula 1 and a glycol ether compound, 

Wiping device, liquid discharging device, and wiping method

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

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 a cleaning solution used for cleaning an ink containing a resin in an amount of 5 percent by mass or greater, the cleaning solution including a mixture solvent containing water and a solvent, wherein a hydrogen bond term of a Hansen solubility parameter of the mixture solvent is 7.0 (cal/cm)or less.

Cleaning solution, set of ink and cleaning solution, cleaning solution stored container, inkjet printing apparatus, and inkjet printing method

Provided is cleaning solution used for cleaning ink containing water and resin, cleaning solution containing water and solvent. Solvent contains glycol ether compound represented by general formula 1. Ink film obtained by drying the ink has swelling ratio of 20 percent or higher but 150 percent or lower, where swelling ratio is calculated by mathematical formula 1 based on masses of ink film before/after immersed in cleaning solution at 25 degrees C. for 24 hours,R(OR)OR&#x2003;&#x2003;General formula 1 In general formula 1, Rand Rrepresent hydrogen atom or alkyl group including from 1 through 4 carbon atoms, Rrepresents alkyl group including from 2 through 3 carbon atoms, and X represents integer of from 1 through 4,Swelling ratio(%)=100&#xd7;[()/&#x2003;&#x2003;Mathematical formula 1 In mathematical formula 1, A represents mass of ink film before immersed, and B represents mass of ink film after immersed.

An inkjet recording method performed by inkjet recording device including nozzle plate with nozzle to eject droplets of ink; recording head including liquid chamber with which the nozzle is in communication, and pressure-generating unit configured to generate pressure in the liquid chamber; and signal-generating unit configured to generate signal applied to the pressure-generating unit, and allowing the droplets of the ink to eject by the pressure generated by the pressure-generating unit according to the signal, wherein the ink has static surface tension of 18.0 mN/m to 27.0 mN/m at 25&#xb0; C., the ink has receding contact angle on the nozzle plate of less than 50&#xb0;, the signal has two-step pull pulse for pulling the ink into the nozzle in two-step manner within one printing unit cycle, and the method includes pulling the ink located in proximity to nozzle outlet into the nozzle of the two-step pull pulse, to form meniscus at predetermined position.

Inkjet recording method and inkjet recording device

An inkjet recording method includes forming an image on a coated layer provided at least one side of the substrate of a recording medium with ink containing a colorant; and then applying a post-processing fluid comprising a resin to the image; wherein the application amount per unit area of the post-processing fluid to the image is controlled to be less than the application amount per unit area of the ink to form the image.

An inkjet recording method, containing: applying a stimulus to an inkjet recording ink to jet the ink, to form an image on a recording medium, wherein the ink contains water, a water-soluble organic solvent, a colorant, and a surfactant, and has a predetermined surface life time as measured by a maximum bubble pressure method and a predetermined static surface tension, wherein the recording medium contains a support, and a recording layer provided at least one surface of the support, where the recording layer contains a cationic resin in a predetermined amount, and is a medium for a concealing postcard where the recording medium is folded to bond a surface of the recording layer to face each other with an adhesive after information is recorded on the surface of the recording layer, in which the surface of the recording layer has a predetermined 10-sec Cobb size degree.

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

An ink cartridge including a holding member and an ink bag to accommodate ink, wherein the ink cartridge is replenished with pigment ink having a pH higher than a pH of residual ink remaining in the ink cartridge.

Ink cartridge and method of replenishing ink cartridge

An inkjet recording method is performed using an inkjet recording device including a recording head provided with a nozzle, a pressure chamber, a pressure generator and a driving signal generator, the method satisfying the following requirements (1) and (2): (1) it is required to use aqueous ink having a dynamic surface tension larger by 10 mN/m or more than a static surface tension when the surface life measured at 25&#xb0; C. by a maximum foaming pressure method is 15 ms and a dynamic surface tension larger by 5 mN/m or more than a static surface tension when the surface life measured by a maximum foaming pressure method is 1500 ms and (2) it is required that the signals have a drawing pulse in one print period and a meniscus of the aqueous ink is drawn into the nozzle in two stages by the drawing pulse.

Inkjet recording method, inkjet recording device, and recorded material

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Kanagawa, Japan

Akiko Bannai