Ricoh Company, Ltd.

Takuya Saiga

Shigeyuki Harada

Takuya Yamazaki

Yuya Hirokawa

Hiroshi Gotou

Kazuhiko Umemura

Yuusuke Koizuka

Satoyuki Sekiguchi

Hidetoshi Fujii

Hiroki Hagiwara

Daisuke Asahina

Koichiro Oyama

Ryo Miyakoshi

Sei Yamamoto

Risa Tamura

An ink contains water, a pigment, and a polymer having a structure unit represented by the following Chemical structure 1, 

Ink, ink accommodating unit, recording method, recording device, and method of manufacturing ink

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 ink contains water, a coloring material, and a polymer having a structure unit represented by the following Chemical formula 1 and a structure unit having an anionic group, 

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

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 surface treatment liquid composition for a substrate is provided. The surface treatment liquid composition includes a water-soluble salt, water, and a resin particle including a resin having a structural unit represented by the following formula (1): where Rrepresents &#x2014;COO&#x2014;; each of Rand Rindependently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and n represents an integer of from 5 to 100.

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Kanagawa, Japan

Takuya Saiga