| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-aqueous pigment ink with preferable storage stability and a high printing density.SOLUTION: The non-aqueous pigment ink includes (A) an alkyl (meth)acrylate copolymer having 2.5-25 mass% of a carbocyclic ring part with respect to the entire copolymer and 0.05 mass% or less of a nitrogen-containing group part with respect to the entire copolymer, (B) an alkyl (meth)acrylate copolymer having 0.5-5.0 mass% of a nitrogen-containing group part with respect to the entire copolymer and 1.0 mass% or less of a carbocyclic ring part with respect to the entire copolymer, (C) a pigment, and (D) an organic solvent. |
