A printed sheet with more than one page on it that is folded so that as in a book the pages are in their proper numbered sequence.

Any kind of cross marks or other symbols applied to a press sheet to assure proper registration.

Abbreviation of Pantone Color Matching System.

The printing method that is most commonly used, where the printed material does not receive the ink directly from a printing plate but from an intermediary blanket, which receives the ink from the plate and then transfers it to the paper.

Any copy which can be reproduced without the use of a halftone screen.

When printed ink colors become lighter or less dense after they have dried on the paper.

Assembling sheets of paper as well as signatures into their proper sequence.

A photographic looking color print made by heating dyes on a substrate instead of applying inks. Frequently used for proofing.

A necessary part of the offset printing process whereby rollers distribute a solution to the plate, which covers the non-printing area of the plate, repelling ink in those fields. Some newer presses use a waterless ink technology, which does not use dampening.

A color trial strip that is printed on the waste part of a press sheet. It assists a press operator to monitor and assure the quality of the printed material relative to ink density, registration as well as dot gain. It can include a Star Target as well, which is designed to detect inking and press problems.