Ricoh Company, Ltd.

Hokuetsu Kishu Paper Co., Ltd.

Tohru Ohshima

Kiyofumi Nagai

Naoya Morohoshi

Michihiko Namba

Akihiko Gotoh

Akihiko Matsuyama

Masayuki Koyano

Hiroshi Goto

Tamotsu Aruga

Masanori Hirano

Hisashi Habashi

Mariko Kojima

Hiroyoshi Matsumoto

Shigetaka Sakakibara

Hiroyuki Kiyoi

Atsushi Hasegawa

Shuichi Oguma

Hisanori Sakatsume

Yuuji Kojima

Yasuharu Onogi

A treatment-target modification device is configured to modify a treatment target being conveyed, with discharge. The treatment-target modification device includes: a hydrophilization unit configured to perform hydrophilization treatment on the treatment target (; and a measurement unit configured to measure two-dimensional distribution of a reflectance spectrum of light reflected from the hydrophilization-treated treatment target.

Treatment-target modification device, treatment-target modification system, image forming system, and image forming method

A liquid discharge apparatus includes a device to apply a treatment liquid to a medium; a drying device to dry the treatment liquid applied to the medium; a device to apply a liquid containing a colorant to the medium on which the treatment liquid has been applied; and a control device. The control device controls a supply amount of the treatment liquid to an amount such that a surface hardness of the medium is 0.07 GPa or more as measured by nano indentation after the drying device dries a surface of the medium.

Liquid discharge apparatus, method of applying treatment liquid to medium, and image forming method

A printing medium including at least base paper and a coating layer, wherein the coating layer is directly formed on the base paper by a cast coating method using a coating liquid, which contains kaolin and amorphous silica and contains the amorphous silica in an amount of 3% by mass to 20% by mass.

Variable printing medium having high glossiness, and recording method

The present invention provides a recording ink set containing a black ink, a cyan ink, a magenta ink, and a yellow ink, each of which contains water, a water-insoluble color material, a water-soluble organic solvent, and a surfactant, wherein the black ink and at least one of the inks other than the black ink respectively contain a different water-soluble organic solvent; and the surface tension of the water-soluble organic solvent(s) used only for the inks other than the black ink is higher than that of the water-soluble organic solvent used only for the black ink; and the present invention also provides a recording method using the recording ink set.

Recording ink, recording ink set, records, ink cartridge, recording method, and inkjet recording apparatus

An ink for inkjet recording containing water, water-soluble organic solvent, water-dispersible resin, fluorochemical surfactant or derivative thereof, and coloring agent containing pigment, where the ink has a surface tension of 20-35 mN/m and viscosity of &#x2267;5 mPa&#xb7;s at 25&#xb0; C., total amount of the water-dispersible resin and the coloring agent in the ink is 5-40% by mass, and mass ratio A/B of the water-dispersible resin A to the coloring agent B is 0.5-4, where the ink is applied to a recording medium containing a support containing cellulose pulp, and one or more barrier layers disposed on a face of the support, and where the barrier layer contains &#x2267;30% by mass of inorganic pigment having refractive index of &#x2267;1.5, excluding aluminum hydrate, and &#x2266;10% by mass of inorganic pigment having a refractive index of &#x3c;1.5.

Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus

An ink-jet recording ink including water, a water-soluble organic solvent, a pigment as a colorant (B), and at least one fluorochemical surfactant selected from compounds represented by Structural Formula (1) below, Structural Formula (1) where Rdenotes any one of a hydrogen atom, an alkyl group and a perfluoroalkyl group, Rdenotes any one of a hydrogen atom, an alkyl group and a fluorine-containing group, Rf denotes a fluorine-containing group, and m and n each denote an integer of 1 or greater. 

Ink-jet recording ink, ink-jet recording ink set, ink-jet recording ink media set, ink cartridge, ink-jet recording method and ink-jet recording apparatus

An inkjet medium having a support mainly containing a cellulose pulp, and a coat layer containing a pigment and an adhesive, the coat layer formed on at least one surface of the support, wherein the pigment in the coat layer as an outermost layer contains at least light calcium carbonate, kaolin and gel type silica, and has an average oil absorption of 70 ml/100 g to 120 ml/100 g.

Inkjet medium, ink and inkjet recording method

The present invention provides an ink-media set, record printed by use of the ink-media set, an inkjet printing method, and an inkjet printing apparatus which includes ink that has at least water, dye, and humectant and surface tension thereof is 20 to 35 mN/m at 25&#xb0; C., a support, and a recording medium having the support and at least one surface thereof has a coating layer wherein transfer rate of the ink to the recording medium measured by a dynamic scanning absorptometer in 100 ms of contact time is 4 to 15 ml/mand transfer rate of the ink to the recording medium measured by a dynamic scanning absorptometer in 400 ms of contact time is 7 to 20 ml/m.

Recording ink, recording medium, ink media set, ink recorded matter, ink jet recording method, and ink jet recording apparatus

A recording ink containing at least a solid component which contains a colorant and a resin and is a solid at 25&#xb0; C., a liquid component which has a higher boiling point than that of water and is a liquid at 25&#xb0; C. and water, wherein the total content of the liquid component in the recording ink is 20% by mass or less, the total content of the solid component in the recording ink is 20% by mass or more, and the total content of a resin component in the solid component is 40% by mass to 95% by mass relative to a total amount of the solid component is provided.

Recording ink as well as ink media set, ink cartridge, ink recorded matter, inkjet recording apparatus and inkjet recording method

An inkjet recording method including printing an image on a recording medium using an aqueous ink, wherein the recording medium includes a support containing a cellulose pulp, and a coat layer containing a pigment and a binder, and optionally containing a cationic additive in an amount of 0.1% or less in the total amount of the coat layer, which is formed in one or more layers on at least one surface of the support, wherein the recording medium has an outermost layer of the coat layer having a gloss at an angle of 60 degrees in accordance with JIS-ZS-8741 of 13 or less, and a centerline average roughness Ra of 0.2&#x3bc;m to 2.5 &#x3bc;m at a cut-off value of 0.8 and the aqueous ink contains coloring particles, a resin emulsion, water, and a wetting agent, the aqueous ink has a solid content of 3% by mass or more.

Inkjet recording method, inkjet recording medium, and aqueous ink

To provide an ink for inkjet recording containing water, water-soluble organic solvent, water-dispersible resin, fluorochemical surfactant or derivative thereof, and coloring agent containing pigment, wherein the ink has a surface tension of 20-35 mN/m and viscosity of 5 mPa&#xb7;s or more at 25&#xb0; C., total amount of the water-dispersible resin and the coloring agent in the ink is 5-40% by mass, and mass ratio A/B of the water-dispersible resin A to the coloring agent B is 0.5-4, wherein the ink is applied for a recording medium for inkjet recording containing a support containing cellulose pulp, and one or more barrier layers disposed on at least one face of the support, and wherein the barrier layer contains 30% by mass or more of inorganic pigment having refractive index of 1.5 or more, excluding aluminum hydrate, and 10% by mass or less of an inorganic pigment having a refractive index of less than 1.5.

The image recording method includes ejecting an ink to form an image on the surface of a recording layer of a recording medium; and then applying a glossiness imparting liquid on the surface of the recording medium. The ink includes a particulate colorant, a surfactant and water, and has a solid content of not lower than 6% by weight. The recording layer is located overlying a substrate including cellulose pulp as a main component and includes an inorganic pigment and a styrene-butadiene copolymer. The surface of the recording medium bearing the recording layer absorbs the ink in an amount of from 1 ml/mto 10 ml/mbefore coating the glossiness imparting liquid when the ink absorbing amount is measured with a dynamic scanning absorptometer at a contact time of 500 ms.

Image recording method

To provide an inkjet recording method including: flying ink by application of stimulation to the ink to form an image on a recording media, wherein the recording media has at least one barrier layer of 10 m or less in thickness on at least one surface of a substrate comprising a cellulose pulp, the barrier layer contains 30% by mass or more of an inorganic pigment with a refraction index of 1.5 or less other than alumina, and the content of pigment with a refraction index of less than 1.5 in the barrier layer is 10% by mass or less, wherein the ink contains either a pigment or colored fine particle as coloring material, and a coloring material fixing constituent, and the surface tension of the ink is 25 mN/m or less, and the total amount of the ink on the recording media is 15 g/m2 or less.

Recording media, recording media-ink set, inkjet recording method and inkjet recording apparatus

An ink-jet recording method including: printing on a medium by ejecting thereon ink having a pH value of 8 or more and containing at least a particulate colorant, emulsion resin and surfactant, the medium prepared by providing at least a coat layer containing a pigment on at least one surface of a substrate containing cellulose pulp as a main component, wherein printing is performed at a deposited ink amount of 15 g/mor less, and wherein the medium has a pH value of 8 or more at a paper surface, and the amount of pure water transferring onto a surface of the medium having the coat layer after a contact time of 100 ms measured with a dynamic scanning absorptometer is 1 mL/mor less and the amount of pure water transferring onto the surface of the medium after a contact time of 400 ms is 35 mL/mor less.

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

To provide an ink jet recording method including: performing image recording on a recording medium to obtain an ink adhesion quantity of 15 g/mor less of an ink containing at least a colorant, the recording medium having at least one coating layer on at least one surface of a substrate including cellulose pulp; and dry-to-touch drying the recorded image and bringing a heat source into direct contact with the recording medium for image fixing, wherein the recording medium is formed such that a transfer quantity of pure water into the recording medium in a contact interval of 100 ms that is measured with a dynamic scanning liquid absorptometer is 1 mL/mor more to 30 mL/mor less and a transfer quantity of pure water into the recording medium in a contact interval of 400 ms is 2 mL/mor more to 35 mL/mor less.

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Atsugi, Japan

Tohru Ohshima