An antioxidant agent used to prevent inks from skinning over in the can.

Black step-marks printed on the back of folded sheets, to facilitate collating and checking of the sequence of book signatures.

Paper which has a different color or finish on each side.

Paper which has a different color or finish on each side.

The process of making printing plates, including preparation of the plate surface, chemically sensitizing the plate, exposing it to the flat, developing or processing the plate, and finally the finish [..]

A term used to describe how well a paper runs on a printing press.

The resistance to scratching of a surface of paper by other paper surfaces or other materials.

The ability of a material to take up moisture.

Author's Correction.

A type of paper folding in which each fold runs in the opposite direction to the previous fold creating a pleated or accordion effect.