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Acid-free Paper - 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.
Additive Color - Color produced by light falling onto a surface, as compared to subtractive color.
The additive primary colors are red, green and blue.
Against the Grain - 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.
Alteration - Any change made by the customer after copy or artwork has been given to the printer.
The change could be in copy, specifications or both.
Anti-offset Powder - 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.
Antique Paper - Roughest finish offered on offset paper.
Aqueous Coating - Coating in a water base and applied like ink by a printing press to protect and
enhance the printing underneath.
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