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A4 Paper
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ISO paper size 210 x 297mm used for Letterhead.
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Abrasion Resistance
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The resistance to scratching on the surface of paper by other paper surfaces or other materials.
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Absorbency
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The ability of a material to take up moisture
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Accordion Fold
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Bindery term, two or more parallel folds that open like an accordion.
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Achromatic
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The non-colors: black, white and gray.
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Acid-Free Paper
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Paper made from pulp containing little or no acid so it resists deterioration from age. Also called alkaline paper, archival paper, neutral pH paper, permanent paper and thesis paper.
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Additive Color
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Color produced by light falling onto a surface, as compared to subtractive color. The additive primary colors are red, green and blue.
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Aerate
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Refers to a manual process in which an air stream is blown onto paper sheets to create a riffling effect that separates the sheets as they are fed to the printing press.
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Against the Grain
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At right angles to the grain direction of the paper being used, as compared to with the grain. Also called across the grain and cross grain. See also Grain Direction.
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Alignment
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The position of type and/or art materials as they are aligned on a horizontal or vertical line.
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Alphabet Length
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The measured length (in points) of the lowercase alphabet of a certain size and series of type.
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Alteration
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Any change made by the customer after copy or artwork has been given to the service bureau, separator or printer. Also called AA, author alteration and customer alteration.
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Anti-Offset Powder
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Fine powder lightly sprayed over the printed surface of coated paper as sheets leave a press. Also called dust, offset powder, powder and spray powder.
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Antique Finish
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Paper with a rough, sized surface used for book and cover stock.
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Antique Paper
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Roughest finish offered on offset paper.
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Apron
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The white area of text (or illustrations) at the margins, which form a foldout.
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Aqueous Coating
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A water-based coating applied after printing, either while the paper is still on press ("in line"), or after it's off press. An aqueous coating usually gives a gloss, dull, or matte finish, and helps prevent the underlying ink from rubbing off. Unlike a UV coating or a varnish, an aqueous coating will accept ink-jet printing, making it a natural choice for jobs that require printing addresses for mass mailings.
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Aqueous Plate
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Water-soluble plate coatings, which are less toxic and less polluting.
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Artwork
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All illustrated material, ornamentation, photos and charts, etc. that is prepared for reproduction.
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ASA Number
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A number set by the American Standards Assoc., which is placed on film stock to allow calculation of the length and "F" number of an exposure. See also "F" numbers.
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Ascender
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Any part of a lower case letter which rises above the main body of the letter such as in "d", "b" and "h".
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Author's Alterations (AA's)
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At the proofing stage, changes that the client requests to be made concerning original art provided, usually at additional cost to the client
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Autochrome Paper
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Coated papers that are regarded as exceptional for multi-colored printing jobs.
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