US 12,297,364 B2
Ink set and recording method
Keigo Ando, Matsumoto (JP); and Mitsuaki Kosaka, Minowa (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 17, 2022, as Appl. No. 17/889,668.
Claims priority of application No. 2021-133328 (JP), filed on Aug. 18, 2021.
Prior Publication US 2023/0072577 A1, Mar. 9, 2023
Int. Cl. C09D 11/40 (2014.01); B41J 2/01 (2006.01); B41J 2/21 (2006.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/102 (2014.01); C09D 11/107 (2014.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01)
CPC C09D 11/40 (2013.01) [B41J 2/01 (2013.01); B41J 2/2117 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/102 (2013.01); C09D 11/107 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An ink set comprising:
a non-white ink composition containing a non-white coloring material; and
a white ink composition containing a white coloring material,
wherein the non-white ink composition and the white ink composition are each an aqueous ink jet ink;
the non-white ink composition contains a silicone-based surfactant A having a maximum peak within a molecular weight range of 3,000 to 20,000 within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography, a content of the silicone-based surfactant A relative to a total mass of the non-white ink composition is 0.1% by mass or more;
the white ink composition contains a silicone-based surfactant B having a HLB value of 10.5 or less by the Griffin method, but not having a maximum peak within a molecular weight range of 3,000 or more within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography, a content of the silicone-based surfactant B relative to the total mass of the white ink composition is 0.3% by mass or more; and
a content of the silicone-based surfactant A relative to a total mass of the white ink composition is 0.05% by mass or less.