Seiko Epson Corporation

Taketoshi Kagose

Satoru Miura

Chigusa Sato

Hiroki Nakane

Toru Saito

Hiroaki Kida

Jun Ito

Toshiyuki Miyabayashi

Hiroyuki Kajimoto

Naoyuki Toyoda

Masaya Shibatani

Hidekazu Moriyama

Minoru Yamada

Toshiyuki Kobayashi

Tomohiro Ogawa

Koki Hirata

Masaru Terada

Homare Kuribayashi

Shinichi Kato

Yoshinobu Sato

Tomohito Nakano

Kenji Kitada

Hiroshi Sawada

Hirotoshi Koyano

An ink jet recording method uses an ink jet recording apparatus including a plurality of heads arranged in parallel in a first direction, each of which ejects droplets of a different radiation-curable ink composition onto a recording medium, and first light sources provided for corresponding heads so as to be disposed at a predetermined side of the corresponding heads. The first light sources emit active radiation to irradiate the droplets on the recording medium. The method includes ejecting droplets of the ink compositions from the heads onto the recording medium, and performing a first irradiation by irradiating the droplets of each ink composition with the active radiation from the corresponding first light source at an irradiation energy within 500 ms after the droplets have landed. The irradiation energy is in the range of 5% to 10% of the energy Eat which the ink composition is 90% cured.

Ink jet recording method

An ink composition has a viscosity of 25 mPa&#xb7;s to 35 mPa&#xb7;s at 20&#xb0; C., wherein a, b, and c are 800 or more, 7.4 to 14, and 0.16 to 0.22, respectively, when a cylindrical portion is formed by expanding the ink composition so as to have a free surface parallel to the expanding direction of the ink composition, the rate of change in width of the cylindrical portion with time is measured in the expanding direction thereof, and the rate of change in width of the cylindrical portion with time is fit to a quadratic function given by the following equation:&#x2003;&#x2003;(1)where S is the rate of change in width of the cylindrical portion and t is the time in seconds.

Ink composition and recording method

The invention provides metal powder constituted from metal particles. Each of the metal particles comprises a base particle having a surface and a metal material constituting at least the surface of the base particle. The base particle is subjected to a surface treatment with a fluorine type phosphoric acid ester. Further, the invention also provides an ultraviolet ray curable ink jet composition to be ejected by using an ink jet method. The ultraviolet ray curable ink jet composition comprises a polymerizable compound and metal powder constituted from metal particles. The metal particles of the metal powder are subjected to a surface treatment with a fluorine type phosphoric acid ester.

Metal powder, ultraviolet ray curable ink jet composition and recorded object

Provided are a radiation-curable ink composition including phenoxyethyl acrylate (A) in an amount of from 20 to 55 mass % of the total reaction components, a multifunctional acrylate (B) in an amount of from 20 to 50 mass % of the total reaction components, and a black pigment (F1); and a radiation-curable ink composition including phenoxyethyl acrylate (A) in an amount of from 20 to 55 mass % of the total reaction components, a multifunctional acrylate (B) in an amount of from 10 to 50 mass % of the total reaction components, and a yellow pigment (F2).

Radiation-curable ink composition, ink jet recording method, and recorded matter

The ink jet recording method includes discharging liquid droplets of a photocurable ink composition including a solvent, a polymerizable compound, and a photopolymerization initiator from a head to a recording medium to land the liquid droplets, thereby forming an image; evaporating the solvent included in the photocurable ink composition constituting the image; and irradiating the image after the second step with light, wherein when the irradiation is initiated in the third step, the content of the polymerizable compound included in the photocurable ink composition constituting the image after the second step is from 20 to 90% by mass, based on the total mass of the ink composition.

Ink jet recording method, photocurable ink jet ink composition, and ink jet recording device

Provided is a UV curable type ink-jet ink composition containing a monomer A which is expressed by the following general formula (I):CH&#x2550;CR&#x2014;COOR&#x2014;O&#x2014;CH&#x2550;CH&#x2014;R&#x2003;&#x2003;(I)

Ultraviolet curable type ink-jet ink composition, recording method and recording apparatus using the same

Ink jet recording method and ink jet recording apparatus

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Shiojiri, Japan

Taketoshi Kagose