Ricoh Company, Ltd.

Yuya Hirokawa

Shun Saito

Shigeyuki Harada

Yuusuke Koizuka

Hiromi Sakaguchi

Takashi Tamai

Naoto Shimura

Ryo Miyakoshi

Sayuri Kojima

Takuya Saiga

Nozomi Terai

Kazuhiko Umemura

Satoyuki Sekiguchi

Yoshihiro Moriya

Hiroki Hagiwara

Hidetoshi Fujii

Daisuke Asahina

Takayuki Shimizu

Itsuro Sasaki

Sei Yamamoto

Tatsuya Takarada

Shunsuke Horie

Ryota Iwasaki

Kenta Hagiwara

An active energy ray polymerization initiator has a structure of Chemical Formula (1) or (2),

Active energy ray polymerization initiator, active energy ray curing composition, active energy ray curing ink, aqueous active energy ray curing ink, container, image forming device, image forming method, and method of manufacturing active energy ray polymerization initiator

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

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

An image forming method includes discharging ink containing water, a coloring material, a polymerization initiator, and a polymerizable compound to a recording medium by a line head to obtain an image, exposing the image to active energy radiation, applying a processing fluid to the image, and drying the image with heat, wherein the time interval between when the ink is discharged in the discharging from the line head to the recording medium passing under a bottom portion of the line head and when the recording medium is exposed to the active energy radiation in the exposing is from 0.5 to 15 seconds.

Image forming method

A method of printing includes applying a processing fluid to a substrate and inkjet discharging a white ink to the substrate onto which the processing fluid has been applied, wherein the processing fluid contains a tri-valent metal salt, a nonionic urethane resin, and water and the white ink contains a white pigment, a resin, and water.

Method of printing including applying a processing fluid and white ink to a substrate and device for such printing

An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60&#xb0; C.

Image forming method, image forming apparatus, and method for manufacturing printed matter

An ink includes a coloring material, an acrylic resin particle, an organic solvent, and water, wherein a solid dry film of the ink has a breaking elongation ratio of 50 percent or more, a storage elastic modulus G' of 1.0&#xd7;10Pa or more at 50 degrees C., and a swelling ratio of 40 percent or less to ethylacetate.

Ink, method of manufacturing acrylic resin particle, printing method, ink accommodating unit, and inkjet printing device

A toner including a crystalline polyester and an amorphous polyester is provided. When the binder resin is extracted from the toner with tetrahydrofuran to obtain an extracted solution, and the extracted solution is heated to remove the tetrahydrofuran and obtain a deposit, the deposit contains spherical domains of the crystalline polyester having an average particle diameter of 7.0 &#x3bc;m or less.

Toner, developer, and image forming apparatus

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Kanagawa, Japan

Yuya Hirokawa