Aqueous coating is a clear, fast-drying water-based coating that is used to protect printed pieces. It provides a high-gloss or matte surface that deters dirt and fingerprints. Aqueous coating improves the durability of postcards and other printed pieces as they go through the mail, and protects business cards as they are carried in peoples' wallets. It also looks beautiful on brochures, catalog covers, and presentation folders. Aqueous coatings provide more substantial scuff-resistance than varnishes. Aqueous is typically applied to the entire printed piece, usually by the last unit on a printing press. Due to its water base, aqueous coating is more environmentally friendly than varnish or UV coatings.