Varnishes and vehicles play a critical role in ink manufacturing. While pigments provide the color and are most noticeable, varnishes and vehicles are responsible for carrying the pigments to the substrate and making sure that the ink has the essential properties that printers require. A varnish and a vehicle are essentially the same thing.However, those who formulate offset inks, and flushes for offset inks, usually use the term varnish to denote the mixture of resin components and additives t...