Seiko Epson Corporation

Kenta Tsukada

Kei Hiruma

Tomoyuki Ushiyama

Mitsunobu Nakatani

Hiroaki Kida

Shintaro Asai

An ink jet ink composition contains a metal pigment and at least one liquid medium selected from the group consisting of organic solvents and water. The metal pigment is surface-modified with a surface treatment agent. The metal pigment is in the form of scale-like particles and has a volume average particle size Dof 1.0 μm or less. The ratio D/Z of the volume average particle size Dof the metal pigment to the average thickness Z of the metal pigment particles is 17 or more, and the ratio D/L of the volume average particle size Dto the nozzle diameter L of the ink jet head is 0.050 or less.

Ink jet ink composition and ink jet printing method

A metal pigment composition of the present disclosure is a coloring composition or a composition to be used for preparation of the coloring composition and includes: a metal pigment; a polyoxyalkyleneamine compound; and a liquid medium component, the metal pigment includes metal particles, the metal particles are surface-modified with a surface treatment agent, and the surface treatment agent is at least one selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (2)(A-R—O)P(O)(OH)  (1)(A-R)P(O)(OH)  (2).

Metal pigment composition and coloring method

A coloring composition of the present disclosure includes a metal pigment; an acrylic-based resin having an acid value of 200 mgKOH/g or less; and a liquid medium component, the metal pigment includes metal particles, the metal particles are surface-modified with a surface treatment agent, and the surface treatment agent includes at least one selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (2).(RO)P(O)(OH)  (1)(R)P(O)(OH)  (2)

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Shiojiri, Japan

Kenta Tsukada