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O |
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Oblong |
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A term used to describe printed books, catalogs etc., that are bound on their shorter side; also referred to as album bound. |
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OCC |
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Old corrugated containers. |
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OCR |
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OCR stands for "Optical Character Recognition", a technology to digitize and "read" printed text and characters. |
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OCR Paper |
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A high-quality woodfree paper suitable for optical scanning. OCR paper should have good surface properties and dimensional stability . |
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OD |
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Oven Dry (also known as bone dry) - Weight of a paper specimen when dried to constant weight in an oven at the temperature of 105 +/-2 oC. |
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Odd |
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Papers that are not of standard sizes, weights, finishes, or colors. |
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Odd Sizes |
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Non-standard paper size. |
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Offcut |
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Paper sheets remaining after standard size sheets have been cut. |
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Office Paper |
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A type of uncoated printing and writing paper produced from bleached chemical pulp with little or no mechanical pulp. |
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Off-machine Coating |
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Coating of paper on a separate coating machine. The coating is not applied on the paper machine and the coating machine can be in the same or in a different location. |
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Off-machine Creping |
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A method in which paper is creped in a separate operation rather than on the Yankee machine. |
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Offset |
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An indirect printing method in which the printed material does not receive the ink directly from the printing plate but from an intermediary cylinder called a blanket, which receives the ink from the plate and transfers it to the paper. It is the most commonly used printing method. |
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Offset Blanket |
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A covering for a cylinder on a printing machine for accepting the ink and transferring it to the printing surface. |
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Offset Gravure |
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An offset process involving multiple transfers between the gravure plate, the plate cylinder, and a solid rubber plate. |
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Offset Paper |
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A type of uncoated book paper, which is manufactured specifically for use on offset printing presses. Offset papers should be pick resistant. |
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Offset Press |
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Printing press using an offset method where the image is transferred from the plate cylinder onto paper via a blanket. |
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OMG |
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Old magazines. |
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One-time Carbon |
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A light-weight paper coated only on one side with carbon. This type of paper is used in business forms. |
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Onionskin |
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A thin, light-weight paper used for typing with carbon paper. |
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On-machine |
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Refers to processes such as calendering or coating that are carried out on a paper machine. |
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On-machine Coating |
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Coating of paper on a paper machine and not as a separate operation. In this case, the coating equipment is an integral part of the paper machine. |
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ONP |
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Old newspapers. |
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Opacimeter |
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An instrument that is used to measure paper's opacity. |
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Opacity |
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The ability of a sheet of paper to prevent light transmission through it. High opacity is essential for a paper intended for duplex printing (printing on both sides of paper), or for intensive color printing on one side of the sheet. Opacity increases with increase in grammage of sheet. Addition of fillers, dyestuff, or pigment also increases opacity of paper. However, beating, pressing or calendering of paper decreases it opacity. |
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Opaque |
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A paper property that prevents the transmission of light through the paper sheet. |