A B C D E F G H I J K L M N O P Q R S T U V W XYZ
Oblique stroke - (/)
OCR (Optical Character Recognition) - A special kind of scanner which provides a means of reading printed characters on documents and converting them into digital codes that can be read into a computer as actual text rather than just a picture.
Offprint - A run-on or reprint of an article first published in a magazine or journal.
Offset - Alternate term often used for Setoff.
- Process of coating paper with a coater not part of the paper machine. It can be in the same or in a separate facility.Offset Paper
- Alternate term often used for Uncoated book paper.Offset Powder - Fine powder sprayed on freshly printed sheets to prevent transfer of wet ink as they accumulate in the delivery stack.
Offset Printing - Printing technique that transfers ink from a plate to a blanket to paper instead of directly from plate to paper.OK Sheet
- Printed sheet representing final inking adjustments approved before production run begins.Oldstyle - A style of type characterized by stressed strokes and triangular serifs. An example of an oldstyle face is Garamond.
On-Demand Printing
- Typically refers to printing that is done as needed, not in large quantities and then stored. Files are stored digitally on a computer system so they are current and can be printed quickly and cost effectively. - A property of paper that prevent light transmission through it. Opacity prevents print that is on one side of a sheet of paper from showing through to the other side. Opacity is greatly influenced by basis weight, brightness, type of fiber and filler.Onion Skin - a translucent lightweight paper used in air mail stationery.
Opaque - (1) Not transparent. (2) To cover flaws in negative with tape or opaque paint. Also called block out and spot.Opaque Ink - Heavily pigmented ink that blocks out color of underlying ink or paper.
Open Prepress Interface
- Hardware and software that link desktop publishing systems with color electronic prepress systems.Open Web - Web press without a drying oven. thus unable to print on coated paper.
Optical Centre - A point above the true centre of the page which will not appear 'low' as the geometric centre does.
Orphan - Line of type on its own at the top or bottom of a page.
Outer Form
- Form (side of a press sheet) containing images for the first and last pages of the folded signature (its outside pages) as compared to inner form.Outline - A typeface in which the characters are formed with only the outline defined rather than from solid strokes.
Outline Halftone - Halftone in which background has been removed or to isolate or silhouette the main image. Also called knockout halftone and silhouette halftone.Overlay - Sheet of tissue or acetate taped to a mechanical so that it covers the mounting board.
Overlay Proof
- Color proof consisting of polyester sheets laid on top of each other with image in register. Each sheet represents the image to be printed in one color. Also called celluloid proof and layered proof. Overprint - To print additional image over a previously printed image, such as printing type over a screen tint. Also called surprint.Over Run
- Additional number of printed pieces beyond quantity specified.Overs - Additional paper required to compensate for spoilage in printing. Also used to refer to a quantity produced above the number of copies ordered.
Overstrike - A method used in word processing to produce a character not in the typeface by superimposing two separate characters, eg $ using s and l.
Ozalid - A trade name to describe a method of copying page proofs from paper or film.
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