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Glossary of Printing and Graphic Arts Terms - Section O
Oblique
Oblique is the slanting of a san serif type.
Orphan
When a single word or line of type is left at the bottom of a column which is continued on another page it is an orphan.
Outline
An outline is created when the background or a specific area of a photograph or illustration is dropped away. Outlining is also referred to as “masking” or “silhouetting”.
Offset Paper
Also known as book paper. General description of any paper primarily suited for offset printing. Can be coated or uncoated. Characterized by strength, dimensional stability, lack of curl and freedom from foreign surface material. Finish can be vellum or smooth.
Offset Printing Also know as web offset or lithography. Offers highest degree of precision, clarity, and quality. Uses screens of 133 lines or more, printed flat sheet, then folded. Can be solid PMS, in multiple colors and process printing.
Opacity Paper property that measures the degree to which paper stops light from passing through. The more opacity a paper has, the less show-through it permits of the envelope contents. Inside tints can be used to compensate for low-opacity papers.
Open End Style of envelope in which the opening is on the shorter side.
Open Panel
Die cut opening for a window envelope that does not have patch material behind it.
Open Side
Style of envelope in which the opening is on the longer side.
