Coatings and Varnishes
Coatings are applied for two reasons: for special visual effects or to protect ink from scuffing or rubbing off. There are three general categories of coatings in print:
Aqueous coatings are water-based coatings. They’re applied on-press, and cover the press sheet uniformly with gloss, matte, satin, or dull finishes. They behave best on coated or matte stocks, since the inherent coating on such stocks provides an even surface and consistent absorption. Aqueous coatings can be applied to uncoated stock, but there is the risk of mottling due to the nonuniform surface of uncoated stock. Aqueous coatings actually provide better scuffing protection than varnishes.
Ultraviolet (UV) coatings are cured by UV light for quick drying. ...
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