A

abrasion resistance - The level at which paper can withstand continuous scuffing or rubbing.

absorption - The properties within paper that cause it to absorb liquids (inks, water, etc.) which come in contact with it.

accordion fold - A binding term describing a method of folding paper. When unfolded it looks like the folds of an accordion.

acetate proof - A transparent, acetate printing proof used to reproduce anticipated print colors on a transparent acetate sheet. Also called color overleaf proof.

acid free - Paper made in a neutral pH system, usually buffered with calcium carbonate. This increases the longevity of the paper.

acidity - Degree of acid found in a given paper substance measured by pH level. From 0 to 7 is classified acid as opposed to 7 to 14, which is classified alkaline.

against the grain - A right angle to which the fiber direction of a piece of paper lies. Folding with, not against, the grain is recommended.

air-dried paper - Paper that is dried by circulating hot air around it with little or no tension or restraint on the paper. This gives the paper a hard cockle finish typical of bond papers.

alcohol/alcohol substitutes - Liquids added to the fountain solution of a printing press to reduce the surface tension of water.

aluminum plate - A metal press plate used for moderate to long runs in offset lithography to carry the image.

announcement cards - cards of paper with matching envelopes generally used for social stationery, announcements, weddings, greetings, etc.

antique finish - A paper finish, usually used in book and cover papers, that has a tactile surface. Usually used in natural white or cream-white colors.

apron - Extra space at the binding edge of a fold-out, usually on a French fold, which allows folding and tipping without interfering with the copy

archival - Acid free or neutral paper that includes a minimum of 2% calcium carbonate to increase the longevity of the paper.

artificial parchment - Paper produced with poorly formed formation.

artwork - A general term used to describe materials prepared and readied for print.

ascenders - The tops of lower case letters such as: b, d, h and t.