US 12,031,048 B2
Ink set and recording method
Yoshifumi Hano, Matsumoto (JP); Kazuhiko Kitamura, Matsumoto (JP); and Masahiro Yatake, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Nov. 24, 2021, as Appl. No. 17/456,403.
Claims priority of application No. 2020-197279 (JP), filed on Nov. 27, 2020.
Prior Publication US 2022/0169882 A1, Jun. 2, 2022
Int. Cl. C09D 11/54 (2014.01); B41J 2/21 (2006.01); B41M 5/00 (2006.01); C09D 11/102 (2014.01); C09D 11/322 (2014.01); C09D 11/40 (2014.01)
CPC C09D 11/54 (2013.01) [B41J 2/2107 (2013.01); B41M 5/0023 (2013.01); C09D 11/102 (2013.01); C09D 11/322 (2013.01); C09D 11/40 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An ink set comprising:
a colored ink composition which contains a pigment and is a water-based ink jet ink; and
a water-based resin liquid composition which contains a resin,
wherein the resin liquid composition contains a urethane resin having an alicyclic structure or an aromatic ring structure and an acid value of 50 to 100 mg KOH/g, the urethane resin being resin particles in the water-based resin liquid;
wherein the ink set is configured for recording on a low-absorbent recording medium or a non-absorbent recording medium;
wherein the colored ink composition is a white ink containing, as the pigment, a white pigment;
wherein the urethane resin uses polytetramethylene glycol as a constituent component; and
wherein the polytetramethylene glycol has a number average molecular weight of 500 to 3000.