Seiko Epson Corporation

Hisashi Okamura

Hiroko Hayashi

Yasunari Ikeda

Hirofumi Hokari

Shinichi Naito

Kenji Kitada

Kenta Kikuchi

Seiji Kagami

Shinichi Yamamoto

Shigeki Kawada

Michio Nakamori

Kazumasa Otsuki

Hidehiko Komatsu

Yasuhiro Oki

Hiromi Noguchi

Yuzuka Kumagai

An ink jet ink composition includes a coloring material, a water-soluble organic solvent, and water. The coloring material contains a compound (A) having Cr (chromium) as Me in a structure represented by formula (1) below, and a compound (B) having Co (cobalt) as Me in the structure represented by the formula (1) below, and the mass ratio of the compound (B) to the compound (A) is over 0 and 0.06 or less.

Ink jet ink composition

An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.

Aqueous ink jet composition

An aqueous ink jet composition contains: C.I. Disperse Red 364; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of the ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of the polyalkylene glycol; and an anionic dispersant. 

An aqueous ink jet composition includes a first component which is at least one selected from the group consisting of C.I. Solvent Yellow 160: 1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a second component which is a dispersant having at least one chemical structure of a sulfo group and a salt thereof; and a third component which has a coumarin skeleton and at least one chemical structure of a sulfo group and a salt thereof.

An aqueous ink jet composition contains at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359, and a styrene maleic acid-based dispersing agent represented by Formula (1). 

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Shiojiri, Japan

Hisashi Okamura