Ricoh Company, Ltd.

Atsufumi Hanazawa

Tsutomu Maekawa

Tomohiro Nakagawa

Satoshi Takahashi

Hiroshi Gotou

Yuta Nakamura

Takashi Tamai

Koji Katsuragi

Yukitaka Watarai

Dongsik Jang

Sayuri Kojima

Yoshiki Yanagawa

Juichi Furukawa

Satoyuki Sekiguchi

Yoshihiro Harada

Jun Aoto

Hidetaka Kubo

Naoto Shimura

Noriaki Okada

Ayaka Tanaka

Yukihiro Imanaga

Daisuke Aoki

Mizuki Kuroha

A liquid composition includes an inorganic particle and a multivalent metal salt, wherein the liquid composition has a tacking force of 50 mN or less in an area of cast-coated paper where the liquid composition is applied in an amount of 0.12 mg/cmfor the cast-coated paper followed by heating at 80 degrees C. for 15 seconds.

Liquid composition, device for applying liquid composition, image forming device, and image forming method

An ink and processing liquid set contains a processing liquid to be applied to a recording medium, the processing liquid including a multivalent metal salt and an ink to be applied to an area of the recording medium where the processing liquid has been applied, the ink including a urethane resin, a styrene-acrylic resin, and a pigment, wherein the following relations are satisfied: 0.5&#x2264;B/C&#x2264;0.7, where B represents a static surface tension of the ink and C represents a static surface tension of the processing liquid; and 0.5&#x2264;E/D&#x2264;0.9, and 35 (mN/m)&#x2264;E&#x2264;55 (mN/m), where D represents a dynamic surface tension at 15 ms of the processing liquid and E represents a dynamic surface tension at 1500 ms of the processing liquid.

Ink and processing liquid set, image forming method, and image forming device

An image forming method includes applying a processing fluid to a recording medium, applying an ink to the recording medium onto which the processing fluid has been applied, and heating the recording medium onto which the ink has been applied, wherein the ink comprises a black ink and at least one color ink other than the black ink, wherein the following relationship is satisfied: |&#x3b3;(k)-&#x3b3;(c)|&#x2264;5 mN/m, where &#x3b3;(k) represents a dynamic surface tension of the black ink at a surface lifetime of 15 ms and &#x3b3;(c) represents a dynamic surface tension of the at least one color ink at a surface lifetime of 15 ms, wherein the ink discharged from an extreme downstream nozzle in a direction of recording medium conveyance is heated at 1.5 seconds or less after the ink is attached to the recording medium.

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

An image forming method includes applying white ink containing hollow resin particulate to a recording medium and contacting a heating roller having a diameter of 200 mm or less with a first surface of the recording medium.

Image forming method and image forming apparatus

A liquid discharge system includes a pretreatment execution device to perform pretreatment on a medium and a liquid discharge head to discharge liquid onto the medium based on image information on an image to be output. The liquid discharge system further includes circuitry configured to control a manner of the pretreatment based on the image information.

Liquid discharge system, image forming apparatus, and liquid discharge method

A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C. or lower, wherein the ink contains a second nonionic resin including the following structure unit a-1 and a coloring material 

Printing method and set of processing fluid and ink

A surface treatment liquid composition for a substrate includes a nonionic resin particle and a multivalent metal salt.

Surface treatment liquid compostion, ink set, recording method, and recording device

An intermediate transferer includes a substrate; and a surface layer overlying the substrate. The surface layer includes a crosslinked material, including a polyrotaxane including a circular molecule; a straight-chain molecule including the circular molecule in a skewering form; and a block group located at both ends of the straight-chain molecule, preventing the circular molecule from releasing, and at least one resin selected from the group consisting of acrylic resins, fluoreresins and silicone resins.

Intermediate transferer and image forming apparatus using the same

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Tokyo, Japan

Atsufumi Hanazawa