The stapling of sheets (or signatures) on the side nearest to the spine.

The placement of two or more printed images in exact alignment with each other.

A process of binding books whereby holes are drilled on the spine, and a plastic grasping device is inserted to contain the pages together.

An erroneous variation of the word “set-off”. When printed, ink that is unintentionally transferred from a printed sheet to the back of the sheet above it as the pieces is stacked in a pile.

The increase of space between typeset letters.

Envelopes in place of a stamp, an image and/or text pre-printed on mailing.

To meet in the center, a three or four panel folds where the two outside panels fold inward. There are three panels in an open gate fold, the bottom of which is twice the size of the folded panels. There are four panels of more or less equal size in a closed gate fold where the outer panels are folded inward together.

A two-color halftone reproduction which is generated from a one color photo.

A shade of blue which is used in four-color process printing. The C in CMYK. Referred to as process blue as well.

The proportional amounts of process colors used to reproduce a picture, either digitally or when printed on a press.