| abstract |
PROBLEM TO BE SOLVED: To provide an ink having excellent spreadability and storage stability with respect to a polypropylene film. SOLUTION: The surfactant contains water, a pigment, an organic solvent, a surfactant, and a resin, and the surfactant contains a compound represented by the following general formula (1) and is represented by the general formula (1). An ink having a compound content of 0.5% by mass or more and 1.5% by mass or less. It is preferable that the organic solvent contains 3-methoxy-3-methyl-1-butanol, and the content of 3-methoxy-3-methyl-1-butanol is 2% by mass or more. [General formula (1)] However, in the general formula (1), R represents a polyether group. [Selection diagram] None |