Patent ID: 11859095
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. An ink set comprising an inkjet ink and a recording head filling liquid, wherein
the inkjet ink includes a pigment, a pigment coating resin, a first alkali metal ion, and water,
the recording head filling liquid includes polyethylene glycol, a second alkali metal ion, a surfactant, and water,
the polyethylene glycol has a mass average molecular weight of at least 180 and no greater than 800,
a content ratio of the surfactant in the recording head filling liquid is greater than 0.00% by mass and no greater than 0.10% by mass,
the first and second alkali metal ions each contain at least one of Li+, Na+, and K+,
the first and second alkali metal ions are identical to each other,
the recording head filling liquid has a pH of at least 7.0 and no higher than 11.5,
the recording head filling liquid is used to fill a recording head in which the inkjet ink remains, and
the recording head filling liquid is mixed inside the recording head with the inkjet ink remaining in the recording head.