Ricoh Company, Ltd.

Naoto Shimura

Yuta Nakamura

Yuusuke Koizuka

Nozomi Terai

Tatsuya Takarada

Hiroaki Takahashi

Michihiko Namba

Akiko Bannai

Hiromi Sakaguchi

Shizuka Kohzuki

Masahiro Kido

Yuya Hirokawa

Yoshiaki Masuda

Itsuro Sasaki

Shunsuke Horie

Nobuyuki Satoh

Takayuki Shimizu

Hiroshi Gotou

Naohiro Toda

Takashi Tamai

Takuya Fujita

Shinya Seno

Hikaru Kobayashi

Mio Akima

Tetsuto Ueda

Kenichi Taguma

Atsufumi Hanazawa

Sayuri Kojima

Ayaka Tanaka

Yoshimi Nemoto

Kenta Hagiwara

Mizuki Kuroha

An image forming method includes a processing fluid applying step and an ink applying step. The processing fluid applying step involves applying a processing fluid containing a multivalent metal salt, a resin T, a resin Tdifferent from the resin T, and a silicone-based surfactant to a non-permeating base material by an inkjet method, where the processing fluid is free of an organic solvent having a boiling point of 200° C. or higher at normal pressure. The ink applying step involves applying an ink containing a coloring material, an organic solvent, and a resin onto the processing fluid.

Image forming method, set of processing fluid and ink, and 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

A printing method includes discharging ink to a substrate, heating a non-ink-discharged side of the substrate at T, and heating an ink-discharged side of the substrate at T, wherein the ink contains an organic solvent A (boiling point lower than 250 degrees C.), an organic solvent B (boiling point of 250 degrees C.), and a resin, where 0 degrees C. C≤T−T≤90 degrees C. is satisfied, the proportion (organic solvent A/ink) is 30 percent by mass or less, the proportion (organic solvent B/ink) is 1 to 3 percent by mass, the proportion (resin/ink) is 5 to 15 percent by mass, the ink has a viscosity of 8.0 to 11.0 mPa-s at 25 degrees C. and 5.5 to 11.0 mPa-s at 36 degrees C., and a 2.5 μL ink droplet discharged to the substrate shrinks to 0.1 μL within 10.0 seconds at 25 degrees C.

Printing method and printing device

Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R, R, and Reach represent a hydrocarbon group containing from 1 through 8 carbon atoms.

Ink set, inkjet printing apparatus, and inkjet printing method

Printed matter includes a substrate comprising a vinyl chloride resin and a printing layer on the substrate, wherein the surface of the substrate has a static friction coefficient of from 0.04 to 0.06 and a dynamic friction coefficient of from 0.02 to 0.03 when the surface of the substrate is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g, wherein the surface of the printing layer has a static friction coefficient of from 0.35 to 0.50 and a dynamic friction coefficient of from 0.20 to 0.30 when the surface of the printing layer is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g.

Printed matter

ink includes water, an alcohol having a boiling point of 240 degrees C. or lower, and an infrared absorbent, wherein the alcohol accounts for 5.0 percent by mass or more of the total amount of the ink and the ink is free of an alcohol having a boiling point higher than 240 degrees C.

Ink, recording device, recording method, and recorded matter

An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, 

Ink, ink set, printing method, and printing device

An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.

Ink, ink accommodating container, recording device, and recording method

An ink contains water, an organic solvent, and a resin having a glass transition temperature Tg of from 0 to 70 degrees C., wherein a contact angle &#x3b8;1 of the ink against a vinyl chloride resin film and a contact angle &#x3b8;2 of the ink against an ink image formed with the ink satisfies the following relationship: &#x3b8;1&#x3c;&#x3b8;2.

Ink, ink accommodating unit, printing method, and inkjet printing device

A liquid discharging device includes a carriage carrying a head configured to discharge a liquid onto a target, the liquid including an ink, the ink consisting water, an organic solvent, a coloring material, and a plurality of polysiloxane compounds, a driving unit configured to move the carriage and the target relatively to each other, a measuring unit configured to measure the distance between the carriage and the target, an image-capturing unit configured to capture a target image, and a setting unit configured to set a liquid discharging performance of the head based on a measurement result obtained by the measuring unit and the target image obtained by the image-capturing unit.

Liquid discharging device and liquid discharging 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.

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Tokyo, Japan

Naoto Shimura