| O |
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Off-Machine
Coating: |
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Indicates
the process of applying coating material that is not performed on the
paper machine, but as a separate operation. |
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Offset: |
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The most
commonly used indirect printing method in which an impression of type or
a design on a flat plate is printed on a cylinder from which it is
impressed upon the surface to be printed. |
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Onionskin: |
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A thin,
lightweight paper used primarily for typewritten correspondence. |
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Opacity: |
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A
property of paper that minimizes the show-through of printing from the
backside or the next sheet. A paper with low opacity is more
transparent. |
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Oven-Dry
(OD): |
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Moisture-free
(also bone dry) conditions of pulp and paper. Usually determined by
drying a known sample to a constant weight in a completely dry
atmosphere at a specified temperature |