Printing Glossary - please click on the letter for the correct term

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Offsetting: Using an intermediate surface used to transfer ink. Also, an unpleasant happening when the images of freshly printed sheets transfer images to each other.

Offset paper: Term for uncoated book paper.

Ok sheet: Final approved color inking sheet before production begins.

Opacity: The amount of show-through on a printed sheet. The more opacity or the thicker the paper the less show-through. (The thicker/heavier the paper the higher the cost.)

Outline halftone: Removing the background of a picture or silhouetting an image in a picture.

Overlay: The transparent cover sheet on artwork often used for instructions.

Overrun or overs: Copies printed in excess of the specified quantity. (Printing trade terms allow for + - 10 % to represent a completed order.)