| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a print ink composition that exhibits high laminate strength immediately after lamination, for a variety of plastic films, namely having a quick rise of laminate strength.SOLUTION: After diligent consideration of the problem, the inventors have found that a print ink composition comprises a rosin that is a rosin and/or a rosin derivative with an acid number of 120 mgKOH/g or more, and the rosin is not added at the time of pigment dispersion but is added afterwards to the pigment dispersion.</p> |
