Glossary

Acid Free

A paper which does not contain any free acid. Special precautions are taken during manufacture to eliminate acid in order to increase the longevity of the finished paper and to provide a sheet that is suitable for contact with metals.
paper that lacks acid or acid-producing chemicals and because of the absence of this, the paper is more environmentally sound and is more stable over long periods of time.

Anti offset or set off spray
A fine powder that is sprayed on the sheet as it comes off the press to prevent the ink from transferring to the back side of the next sheet.

Antique Finish
Quality bulky paper, particularly opaque, with a rougher surface finish. It can be made in white or in colours, be deckle edged, and either laid or wove. A good printing surface is a feature of this grade which is often used for quality books.
A finish that gives the paper a natural rough surface. This finish is created by pressures being reduced when running on the paper machines and with little or no calendaring being done. 

Archival Paper
Acid free paper used for documents that must last for long periods of time. The paper is manufactured to resist deterioration.

Aqueous Coating

A water based coating which is applied in the same manner as ink. It is used to protect and enhance the printed piece.