P
press sheet
The untrimmed, full-size sheet as it leaves the press.
pressrun
The actual running of the press to print the job, immediately following the makeready.
primary colors
The colorants of a system that are used to print the colors for the entire reproduction. Cyan, magenta and yellow are subtractive primary colors while red. green and blue are additive primary colors.
primitive
The most basic graphic entities, such as points, lines, geometric shapes and characters.
print contrast
A method that is used to measure and optimize the solid ink density, dot gain and shadow contrast, by adjusting the ink strength.
printer driver
A piece of software installed on a computer which tells the computer how a certain printer works, how to access the printer, and what capabilities (such as page size and resolution) the printer has.
printer fonts
Computer files containing the image outlines for type in PostScript format or in another page description language format. When type is created in a software program, the data in the printer font is called to supply the necessary typographic information to the file. Screen fonts supply the same type of information to the computer monitor.
printing plate
An intermediate image carrier used on a printing press to transfer the image from the film to a digital file to the substrate.
printing sequence
The order in which different inks are layed down by a multi-head press. Worldwide, the most popular order for typography is black followed by cyan, magenta, and yellow. Many prefer yellow followed by magenta, cyan, and black.
PrintTalk
A information exchange file format that is an amalgam of JDF and cXML which is designed for commercial printers. It focuses on business transactions for business cards, labels tags, commercial printing, and so on. It has limited adoption.
PRISM
An industry standard that specifies a metadata vocabulary for syndicating, aggregating, post-processing, and multi-purposing magazine, news, catalog, book, and mainstream journal content. It is only used in the US.
process color
The printing ink colors, cyan, magenta, yellow and black.
process control
The tools and methods for keeping each production process within acceptable limits to minimize product variation
prog
Slang for progressive proof
progressive, progressive proof
A series of color proofs that include the finished four-color proof, a three color proof, each individual process color and two-color combinations of each process ink, which makes it possible to see each combination of colors separately. Progressive proofs are printed with ink-on-paper and used for process control when visually compared to the press sheet.
prompt
A flashing signal, dialog box or command on a computer monitor screen that waits for a response from the operator.
proof
A check made at a strategic interval in a process to ascertain quality, e.g. a photographic print made from plate-ready films or flats before the press run to check for the accuracy of layout, type matter, and tone and color reproduction.
proof marks or proofreader’s mark
A widely-accepted system of notations used to indicate corrections or alterations required on a area of type.
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