| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink composition for offset printing, usable in offset printing, and capable of inhibiting an occurrence of a piling phenomenon during printing.SOLUTION: An ink composition for offset printing includes a coloring pigment, a resin, an oil component and a nonionic surfactant, where the nonionic surfactant is an ethylene oxide adduct to a 9-18C monoalcohol, or an ethylene oxide and propylene oxide adduct to a 9-18C monoalcohol. When the molecular weight of the nonionic surfactant is set as X, and the HLB value is set as Y, the following formulae (1) and (2) are satisfied: formula (1) Y≥0.00695X+8.46 and formula (2) Y<15. |
