Wash Up

To clean ink and fountain solutions from rollers, fountains, screens, and other press components.

Waste

Unusable paper or paper damage during normal makeready, printing or binding operations, as compared to spoilage.

Watermark

Translucent logo in paper created during manufacturing by slight embossing from a dandy roll while paper is still approximately 90 percent water.

Web Break

Split of the paper as it travels through a web press, causing operators to rethread the press.

Web Gain

Unacceptable stretching of paper as it passes through the press.

Web Press

Press that prints from rolls of paper, usually cutting it into sheets after printing. Also called reel-fed press. Web presses come in many sizes, the most common being mini, half, three quarter (also called 8-pages) and full (also called 16-pages).

Wet Trap

To print ink or varnish over wet ink, as compared to dry trap.

Window

(1) In a printed product, a die-cut hole revealing an image on the sheet behind it. (2) On a mechanical, an area that has been marked for placement of a piece of artwork.

Wire Side

Side of the paper that rests against The Fourdrinier wire during papermaking, as compared to felt side.

With the Grain

Parallel to the grain direction of the paper being used, as compared to against the grain. See also Grain Direction.

Woodfree Paper

Made with chemical pulp only. Paper usually classified as calendered or supercalendered.

Working Film

Intermediate film that will be copied to make final film after all corrections are made. Also called buildups.

Wove

Paper manufactured without visible wire marks, usually a fine textured paper.

Wrong Reading

An image that is backwards when compared to the original. Also called flopped and reverse reading.