Seiko Epson Corporation

Mitsui Chemicals, Inc.

Jun Ito

Kenichiro Kubota

Naoki Koike

Makoto Nagase

Keiji Iida

Hiroki Nakane

Keitaro Nakano

Toru Saito

Hiroaki Kida

Toshiyuki Miyabayashi

Miharu Kanaya

Chigusa Sato

Satoru Miura

Taketoshi Kagose

Hiroyuki Kajimoto

Shugo Hattori

Yusuke Mizutaki

Kiyomi Kumamoto

Tomohiro Aruga

Akihito Sao

Tomoki Maruyama

Masahiro Yatake

Hidehiko Komatsu

Kazuhiko Hara

Mitsuaki Yoshizawa

Motoki Masuda

Hiroshi Fukumoto

Hiroko Hayashi

Hitoshi Ohta

Shigeki Suzuki

Shuhei Yamada

Masaaki Itano

Masayuki Momose

Tomohito Nakano

Miho Nakamura

Toshihiro Yoshimura

Shuji Ikukawa

Nagatoshi Kasahara

Jitsuko Nakayama

Kenichi Numakura

Keiichi Noto

Akihiro Yamazaki

Tadashi Ishida

An ink jet ink set includes: an aqueous dye ink and an aqueous pigment ink, the ink jet ink set is an ink set to be used for an ink jet recording apparatus which has a first ejection port to eject the aqueous dye ink, a second ejection port to eject the aqueous pigment ink, and a cap to collectively cap the first ejection port and the second ejection port, the cap being composed of the same member as that forming the first ejection port and the second ejection port, the aqueous dye ink contains a dye and a poly(oxyalkylene) alkyl ether, the dye includes a copper phthalocyanine compound having two or less benzene ring structures other than a phthalocyanine skeleton, and the aqueous pigment ink contains a self-dispersible pigment.

Ink jet ink set, ink jet recording method, and ink jet recording apparatus

A photo-curable ink jet ink set includes an undercoating photo-curable ink jet ink containing a (meth)acrylic acid ester having a vinyl ether group expressed by general formula (I), and an overcoating photo-curable ink jet ink. The undercoating photo-curable ink jet ink has a higher surface tension than the overcoating photo-curable ink jet ink.

Photo-curable ink jet ink set and ink jet recording method using the same

A non-aqueous ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a cyclic ester compound, at least one first solvent represented by the following General Formula (1) and having a flash point of 140&#xb0; C. or lower: RO&#x2014;(RO)&#x2014;R, a second solvent represented by the General Formula (1), and C.I. Pigment Orange-43 (PO-43) as a pigment. In the at least one first solvent represented by General Formula (1), Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6. The second solvent represented by General Formula (1) includes a glycol monoether compound in which at least one of Rand Ris hydrogen. A volume average particle diameter of the PO-43 is 100 nm or more and 400 nm or less.

Ink jet ink composition, ink jet recording method, and ink set

An ink jet recording apparatus includes an ink composition, an ink encasement in which the ink composition is encased, a recording head that ejects the ink composition, and a carriage configured to move the recording head back and forth. The carriage carries the ink encasement, with the ink encasement integrated with the carriage. The ink encasement has an ink fill port that opens and shuts as a port through which the ink composition is loaded. The ink composition contains a disperse colorant, with the volume-average particle diameter of the disperse colorant being 110.0 nm or more and 200.0 nm or less, and also contains at least one organic solvent with an SP of 9 or more, with the percentage thereof being 10.0% by mass or more.

Ink jet recording apparatus, ink jet recording method, and ink composition

An ink jet recording apparatus includes an ink composition, an ink encasement in which the ink composition is encased, a recording head that ejects the ink composition, and a carriage configured to move the recording head back and forth. The carriage carries the ink encasement, with the ink encasement integrated with the carriage. The ink encasement has an ink fill port that opens and shuts as a port through which the ink composition is loaded. The ink composition contains a water-soluble dye and a polyhydric alcohol with a normal boiling point of 270&#xb0; C. or above, with the percentage of the polyhydric alcohol being 26.0% by mass or less of the total amount of the ink composition.

An ink jet recording apparatus includes an ink composition, an ink encasement in which the ink composition is encased, a recording head that ejects the ink composition, and a carriage configured to move the recording head back and forth. The carriage carries the ink encasement, with the ink encasement integrated with the carriage. The ink encasement has an ink fill port that opens and shuts as a port through which the ink composition is loaded. The ink composition contains a disperse colorant, with the volume-average particle diameter of the disperse colorant being 105.0 nm or less.

An ink jet recording apparatus includes an ink composition, an ink encasement in which the ink composition is encased, a recording head that ejects the ink composition, and a carriage configured to move the recording head back and forth. The carriage carries the ink encasement, with the ink encasement integrated with the carriage. The ink encasement has an ink fill port that opens and shuts as a port through which the ink composition is loaded and also has a detector that detects the amount of ink composition encased. The ink composition contains a surfactant with an HLB of 6 or less.

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes at least one solvent represented by RO&#x2014;(RO)&#x2014;Rand having a flash point of 140&#xb0; C. or lower and C.I. Pigment Orange-43 (PO-43) as a pigment, wherein Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6.

An ink composition includes a solvent containing at least one compound represented by the following general formula (1):RO&#x2014;(RO)&#x2014;R&#x2003;&#x2003;(1)

Ink jet composition and ink jet recording method

A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains a glycol ether. The amount of water in the non-aqueous ink jet composition is 10 mass % or less based on the total amount of the non-aqueous ink jet composition.

Non-aqueous ink jet composition

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a solvent containing at least one cyclic ester compound; and C.I. Pigment Orange-43 (PO-43) as a pigment.

Ink jet ink composition and ink jet recording method

An ultraviolet curing ink jet ink composition includes a trifunctional or tetrafunctional (meth)acrylate having a pentaerythritol skeleton; and inorganic metal-based fine particles as a color material, in which the viscosity is 8 to 22 mPa&#xb7;s at 20&#xb0; C.

Ink jet ink composition, ink accommodation body and ink jet recording method

A non-aqueous ink jet composition includes a pigment at least containing a diketopyrrolopyrrole red pigment, and an organic solvent at least containing a glycol diether represented by Formula (1): RO&#x2014;(RO)&#x2014;Rand a glycol monoether represented by Formula (2): OH&#x2014;(RO)&#x2014;R, wherein, in Formula (1), Rand Reach independently represent an alkyl group having 1 to 7 carbon atoms, Rrepresents an alkylene group having 1 to 3 carbon atoms, and m represents an integer of 1 to 7; and in Formula (2), Rrepresents an alkyl group having 1 to 7 carbon atoms, Rrepresents an alkylene group having 1 to 3 carbon atoms, and n represents an integer of 1 to 7.

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Shimosuwa, Japan

Jun Ito