Ricoh Company, Ltd.

Hitachi Koki Co., Ltd.

Ricoh Printing Systems, Ltd.

Hitachi Printing Solutions, Ltd.

Hitachi, Ltd.

Tsutomu Maekawa

Akemi Ouchi

Takao Hiraoka

Shinya Seno

Tomoko Hasegawa

Tamotsu Aruga

Soh Noguchi

Masayuki Koyano

Eiji Noda

Okitoshi Kimura

Noriyasu Takeuchi

Atsushi Kakuta

Takashi Tamai

Atsufumi Hanazawa

Hidetoshi Fujii

Michihiko Namba

Koji Katsuragi

Kunihiro Tamahashi

Yukitaka Watarai

Dongsik Jang

Hiroshi Gotou

Yutaka Shoji

Shosuke Aoai

Satoshi Takahashi

Tomohiro Nakagawa

Hiroshi Sasaki

Takahiro Yamada

Hitoshi Kida

Teruaki Mitsuya

Akihiko Gotoh

Yoshiki Yanagawa

Takao Umeda

Akiko Bannai

Yuuki Yokohama

Mariko Kojima

Kunio Satou

Kiminori Masuda

Hiroshi Takahagi

Tadahiro Kaneko

Shin-ya Seno

Shohsuke Aoai

Norlyasu Takeuchi

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 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 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

To provide an image forming method, including applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer; drying the recording medium on which the pre-treatment liquid has been applied; and forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.

Image forming method, image forming apparatus, and recorded matter

An inkjet recording method, containing: applying a stimulus to an inkjet recording ink to jet the ink, to form an image on a recording medium, wherein the ink contains water, a water-soluble organic solvent, a colorant, and a surfactant, and has a predetermined surface life time as measured by a maximum bubble pressure method and a predetermined static surface tension, wherein the recording medium contains a support, and a recording layer provided at least one surface of the support, where the recording layer contains a cationic resin in a predetermined amount, and is a medium for a concealing postcard where the recording medium is folded to bond a surface of the recording layer to face each other with an adhesive after information is recorded on the surface of the recording layer, in which the surface of the recording layer has a predetermined 10-sec Cobb size degree.

Inkjet recording method, inkjet recording device, and ink recorded matter

An inkjet recording method includes imparting a pre-processing fluid to a coated layer provided on at least one surface of the substrate of a recording medium, drying the pre-processing fluid, and forming an image on the recording medium by ejecting an aqueous ink thereon. The pre-processing fluid contains a hydrosoluble organic solvent, a flocculating agent formed of a quaternary salt of an adduct of alkyl amine.epichlorohydrine represented by the following chemical formula 1, and a nonion-based surfactant represented by the following chemical formula 2, wherein the aqueous ink comprises a colorant, a hydrosoluble organic solvent, and a fluorine-containing surfactant represented by the following chemical formula 3 or 4:CF&#x2014;CHCHO(CHCHO)H&#x2003;&#x2003;(3)Chemical formula 3CF&#x2014;CHCH(OH)CH&#x2014;O&#x2014;(CHCHO)&#x2014;Y&#x2003;&#x2003;(4)Chemical formula 4.

Inkjet recording method and inkjet recording device

A pre-treatment liquid includes a flocculant formed of a water-soluble cationic polymer obtained by copolymerizing an amine monomer and an epihalohydrin monomer; a surface conditioner; a surfactant; a water-soluble organic solvent; and water.

Pre-treatment liquid and image forming method

To provide a method of producing a film, comprising: ejecting a liquid B over a liquid surface of an active energy ray-curable liquid as a liquid A by an inkjet process, according to a predetermined periodic signal; and subsequently applying an active energy ray to the liquid A and the liquid B so as to perform curing and obtain a film which comprises a pattern according to any one of (1) to (4) below, (1) a smooth pattern having a periodic amplitude based upon a trigonometric function, (2) a pattern having a periodic depression, (3) a pattern in the form of a periodic flat surface, and (4) a pattern having a periodic semicylindrical shape.

Method of producing film by inkjet process, and film

An ink jet recording method including: applying at least two energy beam curable liquids different from each other in surface tension on a recording medium to form an energy beam curable liquid layer having a distribution pattern of different surface tensions; ejecting an energy beam curable ink on the energy beam curable liquid layer formed on the recording medium; and irradiating the energy beam curable liquid layer and the energy beam curable ink with energy beams to cure the energy beam curable liquid layer and the energy beam curable ink to form an image.

Ink jet recording method, ink jet recording apparatus, and ink jet recorded matter

An ultraviolet crosslinking ink including a radically polymerizable and anionically polymerizable monomer; a photoradical generator; and a photo-base generator. An inkjet recording method including ejecting an ultraviolet crosslinking ink including a radically polymerizable and anionically polymerizable monomer; a photoradical generator; a photo-base generator; and a colorant, toward a surface of a recording material to form an ink image, and irradiating the ink image with ultraviolet light using a light emitting diode.

Ultraviolet crosslinking ink and inkjet recording method

An ultraviolet crosslinking inkjet ink including a radically polymerizable monomer including a methacrylate and no acrylate; and a photoradical generator. An ink cartridge including the ultraviolet crosslinking inkjet ink and a container containing the ultraviolet crosslinking inkjet ink therein. An image forming method including ejecting droplets of the ultraviolet crosslinking inkjet ink toward a recording material to form an image on the recording material; and irradiating the image with ultraviolet light to crosslink the image. An image forming apparatus including a recording device to eject droplets of the ultraviolet crosslinking inkjet ink toward a recording material to form an image on the recording material; and an ultraviolet irradiator to irradiate the image with ultraviolet light to crosslink the image.

Ultraviolet crosslinking inkjet ink, ink cartridge containing same, and image forming method and apparatus using same

A photopolymerizable inkjet black ink having a viscosity not greater than 20 mPa&#xb7;s at 60&#xb0; C., including a clear ink having a viscosity not greater than 15 mPa&#xb7;s at 60&#xb0; C. including a photopolymerizable monomer having a Stimulation Index (SI value) less than 3 when subjected to a skin sensitization test (LLNA method) and a polymerization initiator without including carbon black and insolubles; and a carbon black in an amount not greater than 7% by weight.

Photopolymerizable inkjet black ink, and ink cartridge, inkjet printer and printed material using the ink, and method of preparing the ink

A method of ink jet recording including forming an uncured first ink layer of a first ultraviolet curable ink A on a recording medium, forming an uncured second ink layer having a recording pattern inside the uncured first ink layer of the ink A by discharging a second ultraviolet curable ink B from an ink jet head, and curing the uncured first ink layer by irradiating the uncured first ink layer with ultraviolet light after forming the uncured second ink layer, wherein the ink A contains a photoradical generator and the ink B contains a photobase generator and a coloring agent.

Ink jet recording method

An ink-jet printer head is characterized by comprising an organic film coated on the surface of the nozzle plate for discharging ink, in which solid particles having abrasion resistance are dispersed, and a water-repellent film on the surface of the organic film, in which the chains of fluorocarbon polymer is grown. The head shows improved durability of the chains of the fluorocarbon polymer on the nozzle plate during cleaning of the nozzle surface.

Ink-jet printer head and a manufacturing method thereof

Growing community of inventors

Kanagawa, Japan

Tsutomu Maekawa