Vehicles and varnishes play a critical role in the manufacturing of ink. Terms such as “guts” and “heart Along with pigments, resins and other important additives, varnishes and vehicles are among the critical components that go into ink formulating. (Photo courtesy of Hexion Specialty Chemicals) of the ink” speak to their importance.     Ink manufacturers rely on their vehicle and varnish suppliers to help provide the critical characteristics that printers seek, whether...