| 摘要 |
An ink set includes a combination of a first ink and a second ink, the first ink containing a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions, the second ink containing a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions, wherein the first ink further contains (A) a compound selected from nonionic surfactants and/or (B) a compound selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, ±,É-alkanediol having six carbon atoms, and an imidazolidinone derivative. |
