US 12,378,426 B2
Ink jet ink composition
Hisashi Okamura, Shiojiri (JP); Hidehiko Komatsu, Chino (JP); Hiromi Noguchi, Shiojiri (JP); Yuzuka Kumagai, Shiojiri (JP); and Yasuhiro Oki, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 29, 2023, as Appl. No. 18/127,702.
Claims priority of application No. 2022-055314 (JP), filed on Mar. 30, 2022.
Prior Publication US 2023/0392030 A1, Dec. 7, 2023
Int. Cl. C09D 11/32 (2014.01); B41J 2/01 (2006.01); B41J 2/21 (2006.01); C09D 11/00 (2014.01); C09D 11/30 (2014.01); C09D 11/328 (2014.01)
CPC C09D 11/32 (2013.01) [B41J 2/01 (2013.01); B41J 2/2107 (2013.01); C09D 11/00 (2013.01); C09D 11/30 (2013.01); C09D 11/328 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An ink jet ink composition comprising:
a coloring material;
a water-soluble organic solvent; and
water, wherein
the coloring material contains a compound (A) having Cr as Me in a structure represented by formula (1) below, and a compound (B) having Co 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

OG Complex Work Unit Chemistry