Ricoh Company, Ltd.

Hiroki Nakane

Teruki Kusahara

Hiroaki Takahashi

Takayuki Shimizu

Hiroki Kobayashi

Shizuka Kohzuki

Mio Akima

Masayuki Koyano

Yuuki Mizutani

Kiminori Masuda

Mio Kumai

Azumi Miyaake

Ayano Momose

Maiko Koeda

Mihoko Matsumoto

Yuri Haga

Kaori Miyahara

Provided is an inkjet printing device including an ink storage unit configured to store an ink, an ejection head configured to eject the ink to form a print layer, and a heating unit configured to heat a material to be printed, wherein the ink is an aqueous clear ink including a resin and water, the inkjet printing device has a low gloss printing mode that is a printing mode for imparting low gloss, and a high gloss printing mode that is a printing mode for imparting high gloss, and the heating unit is configured to heat to satisfy the following formula T&#x3e;T, where T(degrees Celsius) is a temperature of a low gloss printing region of the material to be printed where the low gloss printing region is printed with the low gloss printing mode when the aqueous clear ink is deposited on the material to be printed, and T(degrees Celsius) is a temperature of a high gloss printing region of the material to be printed where the high gloss printing region is printed with the high gloss printing mode when the aqueous clear ink is deposited on the material to be printed.

Inkjet printing device, inkjet printing method, and method for controlling glossiness of printed image

An image forming method is provided. The image forming method includes the process of discharging an ink onto a recording medium. The ink comprises a cross-linking agent reactive with an acidic group and a resin having the acidic group reactive with the cross-linking agent. The recording medium has the acidic group reactive with the cross-linking agent on a surface thereof.

Image forming method, image forming apparatus, and image-formed matter

An active energy ray image forming apparatus containing a head, a heating mechanism disposed inside the head, and a storing part configured to accommodate a non-polymerizable synthetic resin and a mono-functional monomer containing a single unsaturated ethylene double bond. An active energy ray image forming apparatus, containing a head, a heating mechanism disposed inside the head, and a storing part configured to accommodate a non-polymerizable synthetic resin and a mono-functional monomer containing a single unsaturated ethylene double bond, where the heating mechanism is heated to 60&#xb0; C. when ink is discharged.

Active energy ray curable composition, active energy ray curable ink, composition stored container, two dimensional or three dimensional image forming apparatus, image forming method, cured material, and processed product

An active-energy-ray-curable composition, a cured material of the active-energy-ray-curable composition satisfying a critical load of 5.0 g or more but 25.0 g or less, the critical load being obtained by a continuous loading test method using a variable normal load friction and wear measurement device, the cured material having an average thickness of 10 &#x3bc;m and being formed by coating the active-energy-ray-curable composition on a substrate and by irradiating and curing the active-energy-ray-curable composition with active energy rays having illuminance of 1.5 W/cmand an amount of irradiation of 200 mJ/cm.

Active-energy-ray-curable composition, active-energy-ray-curable ink, two-dimensional or three-dimensional image forming method, two-dimensional or three-dimensional image forming apparatus, and cured material

An active energy ray curable composition includes a non-polymerizable resin; and polymerizable compounds comprising a mono-functional monomer having a single polymerizable unsaturated ethylene double bond, wherein the following relations are satisfied: &#x394;Tg=|Tg&#x2212;Tg}&#x2267;19 degrees C., where Tgrepresents a glass transition temperature of the non-polymerizable resin and Tgrepresents a glass transition temperature of a homopolymer of the mono-functional monomer, Tg&#x2267;10 degrees C., where Tgrepresents the higher of Tgand Tg, and Tg&#x2266;40 degrees C., where Tgrepresents the lower of Tgand Tg.

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Kanagawa, Japan

Hiroki Nakane