Resins are critical to the functionality of an ink. They impart many of the important characteristics of a finished ink, including gloss and adhesion, can help the ink run well on the press, and can also help disperse pigment. Lisa Fine of Ink Systems Inc. noted that the polymers used in formulating inks have several key functions, depending on the nature of the resin/polymer itself. “For instance, solution polymers of a suitable molecular weight and functionality are useful for dispersing...