David Savastano, Ink World Editor10.07.09
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 that are used to disperse pigment or complete the ink formula.Solvent- and water-based flexographic and gravure ink formulators (and those who manufacture pigment dispersions for these inks) use the term vehicles to address this blend.
“Varnishes and vehicles affect the final properties of the ink, such as printability, resistance properties and visual characteristics. Selection of components for the varnish/vehicle depends on the type of press being used to print the ink, as well as the s
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