Ricoh Company, Ltd.

Hiromi Sakaguchi

Kaori Toyama

Yohta Sakon

Masahiro Ohmori

Masanobu Gondoh

Shinji Nohsho

Shohei Gohda

Hiroshi Gotou

Yuuki Yokohama

Yuka Aoyama

Shun Saito

Yoshiki Yanagawa

Keita Katoh

Takashi Tamai

Sayuri Kojima

Ayaka Tanaka

Yukiko Takamura

Masafumi Ohta

Yuta Nakamura

Masayuki Fukuoka

Hideaki Nishimura

Naoto Shimura

Yuya Hirokawa

Itsuro Sasaki

Shuusuke Someno

Satoshi Takahashi

Nobuyuki Satoh

Naohiro Toda

Junji Nakai

Toshihiro Yoshinuma

Sho Sawahata

Ken Onodera

Takuya Fujita

Shinya Seno

Kenichi Taguma

Tetsuto Ueda

Yasuhisa Katoh

Yoshiaki Masuda

Yoshimi Nemoto

Shunsuke Horie

Ryota Iwasaki

Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.

Ink set, printer, and printing method

An ink contains water, an organic solvent, a polyurethane resin, and a cyclic ester including a structure represented by Chemical formula I, wherein the proportion of the cyclic ester having a crystal having a particle diameter of 1 &#x3bc;m or greater is less than 4 ppm of the total of the ink after the ink is allowed to stand at a temperature range of from 20 to 30 degrees C. for 30 days. 

Ink, method of manufacturing ink, printing method, and printing device

An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60&#xb0; C.

Image forming method, image forming apparatus, and method for manufacturing printed matter

An ink including water, an organic solvent, and a polyurethane resin particle is provided. A rate of content of a compound having a molecular weight of 1,000 or less and having a structure represented by the following general formula (I) in the ink is 10 ppm or less. 

Ink, method for producing ink, method for printing, and printer

A liquid discharging device includes a carriage carrying a head configured to discharge a liquid onto a target, the liquid including an ink, the ink consisting water, an organic solvent, a coloring material, and a plurality of polysiloxane compounds, a driving unit configured to move the carriage and the target relatively to each other, a measuring unit configured to measure the distance between the carriage and the target, an image-capturing unit configured to capture a target image, and a setting unit configured to set a liquid discharging performance of the head based on a measurement result obtained by the measuring unit and the target image obtained by the image-capturing unit.

Liquid discharging device and liquid discharging method

A drying device includes heaters disposed along the direction of conveyance of a recording medium to which liquid is applied, the heaters being configured to heat the recording medium, wherein the recording medium is conveyed in contact with the heaters on a conveyance path including a first path on which the recording medium is conveyed in contact with the heaters for the second time and a second path on which the recording medium is conveyed in contact with the heaters for the second time, wherein a dried film of the liquid formed by the following method has a Martens hardness of 30 N/mmor greater at 120 degrees C.: method: the liquid is applied to a glass plate to form a film and the film is dried with a reduced pressure at 100 degrees C. for three hours to obtain the dried film having an average thickness of 5 &#x3bc;m.

Drying device and image forming apparatus

An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes an organic solvent and a coloring material, and the image recorded matter has a tackiness power of from 80 to 110 nN.

Ink, inkjet recording method, ink cartridge, and image recording device

A method of using recorded matter is provided. The method includes conveying a recorded matter at a relative humidity of 40% or less, where the recorded matter includes a recording medium and a recorded layer on the recording medium. The recorded layer includes an organic solvent, a colorant, and a resin. The organic solvent includes a hexanediol and a propylene glycol. The resin includes an acrylic resin and a urethane resin, where a mass ratio of the urethane resin to the acrylic resin ranges from 0.1 to 0.7.

Method of using recorded matter, recorded matter, and method of manufacturing recorded matter

An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes water, an organic solvent, and a coloring material, and the image has a tackiness power of from 80 to 110 nN.

Provided is an ink containing a wax, a plurality of organic solvents, and water, wherein the plurality of organic solvents include a compound having a solubility parameter of 9 or greater but 11 or less and a compound having a saturated vapor pressure at 100&#xb0; C. of 20 mmHg or greater but 400 mmHg or less.

Ink, ink stored container, inkjet recording apparatus, and printed matter

A method for producing a cleaning blade including at least a strip-shaped elastic blade, the method including: (1) a step of producing an elastic blade preform formed of a polyurethane rubber; (2) a step of impregnating at least a part, which is to contact an image bearer, of the elastic blade preform with an ultraviolet-curable composition including a (meth)acrylate compound; (3) a step of immersing the part impregnated of the elastic blade preform in a washing solvent to remove the ultraviolet-curable composition including the (meth)acrylate compound remaining on a surface of the impregnated part; and (4) a step of curing the ultraviolet-curable composition including the (meth)acrylate compound that has impregnated the elastic blade preform to produce an elastic blade.

Method for manufacturing cleaning blade, cleaning blade, image formation device, and process cartridge

Provided is a set of an ink and a print medium, the set including an ink and a print medium, wherein the ink includes at least one organic solvent, polyurethane resin particles, a colorant, and water, wherein the at least one organic solvent includes a compound having a saturated vapor pressure at 100&#xb0; C. of 65 mmHg or greater but 400 mmHg or less, and wherein a sensor output at a critical image peeling point, measured by a microscratching method, of a solid image formed on the print medium in a manner that the ink is attached in an amount of 0.96 mg/cmis 600 or greater.

Set of ink and print medium, inkjet printing method, inkjet printing apparatus, printed matter, ink, and ink stored container

Ink includes a coloring material, an organic solvent, and water, wherein the ink satisfies the following requisites:

Ink, image forming method, image forming apparatus, and recorded matter

A cleaning blade cleaning the surface of an object includes a rigid holder; and a strip-shaped elastic body fixed on the holder, including a tip ridgeline contacting the surface of the object. The elastic body has a length (L) projecting from the holder not less than 4 mm, a Martens hardness of from 1.0 to 10.0 N/mmfrom the tip ridgeline to the middle (L/2) thereof, and a Martens hardness of from 0.3 to 0.8 N/mmfrom the middle (L/2) thereof.

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Kanagawa, Japan

Hiromi Sakaguchi