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Glossary Of Printing Terms [10]

W Wallpaper A kind of material used to cover and decorate the interior walls of homes, offices, cafes, government buildings, museums, post offices, and other buildings; it is one aspect of interior decoration. It is usually sold in rolls and is put onto a wall using wallpaper paste. Wallpaper printing techniques include surface printing, gravure printing, silk screen-printing, rotary printing, and digital printing.
Wash Up The process of removing printing ink from a press by washing the rollers and blanket. Certain ink colors require multiple washups to avoid ink and chemical contamination.
Web Break Split of the paper as it travels through a web press, causing operators to rethread the press.
Wet Trapping In wet process color printing, the ability to successfully lay down a wet ink film on top of a previously printed, still-wet ink film.
Window Envelopes A conventional envelope with a transparent plastic window to allow the recipient's address to be printed on the paper contained within.
Wire Side The side of a sheet next to the wire in manufacturing; opposite from the felt or top side; usually not as smooth as the felt or top side.
Woodblock printing A technique for printing text, images or patterns originating in China in antiquity as a method of printing on textiles and later paper. In this method, a block of wood is engraved in relief, covered with dye and pressed against paper, leather, textiles, etc.
Woodfree Paper Paper created exclusively from chemical pulp rather than mechanical pulp. Chemical pulp is normally made from pulpwood, but is not considered wood as most of the lignin is removed and separated from the cellulose fibers during processing, whereas mechanical pulp retains most of its wood components and can therefore still be described as wood. Wood-free paper is not as susceptible to yellowing as paper containing mechanical pulp.
Workprint A rough version of a motion picture, used by the film editor(s) during the editing process.
Wove paper A writing paper with a uniform surface, not ribbed or watermarked. The papermaking mould's wires run parallel to each other to produce laid paper, but they are woven together into a fine wire mesh for wove paper.