US 12,312,485 B2
Ink jet ink composition, recording method, and recorded matter
Kenta Kikuchi, Suwa (JP); Hiroaki Kumeta, Matsumoto (JP); Satoshi Tsubamoto, Shiojiri (JP); and Koji Imamura, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 6, 2023, as Appl. No. 18/117,499.
Claims priority of application No. 2022-034793 (JP), filed on Mar. 7, 2022.
Prior Publication US 2023/0279253 A1, Sep. 7, 2023
Int. Cl. C09D 11/38 (2014.01); C09D 11/326 (2014.01)
CPC C09D 11/38 (2013.01) [C09D 11/326 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ink jet ink composition which is a water-based ink jet ink composition, comprising:
a vegetable black-derived colorant;
a lignosulfonate salt; and
an element A which includes at least one selected from the group consisting of Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba,
wherein a content of the element A with respect to a total mass of the ink composition is 50 to 1,700 mass ppm,
the vegetable black-derived colorant is charcoal being a carbonized colorant that is obtained by treating vegetables under a high-temperature condition, and
the ink jet ink composition is a black ink.