Топик По Английскому Языку (Петренко Ю. М.) / Prepress

Prepress.

There are three parts of printing process: prepress, press, postpress.

Conventional prepress.

The prepress step involves the preparation of the copy or information for printing.

Typesetting begins with the inputting of text into a computer. Text input is the first stage of typesetting. Text input is followed by word processing. Word processing is followed by text output.

Page layout including the integration of text and image is carried out electronically in the computer, the completed page is output on film or paper.

Corrections to the output text are time-consuming and expensive and should therefore be avoided as much as possible.

The combination of text and images to form a page occurs during the page "make-up".

Sheet assembly is an information-gathering point of central importance for achieving trouble-free results. The following proofs are typical of what is used in conventional prepress: • galley proof; • position proof; • color proof;

•press proof

Galley proofs are produced for corrections to typesetting products.

Position proofs are required to check the completeness and correct location of text and image.

Color proofs are necessary for judging the quality of multicolor products.

Press proofing process is produced on the paper and with the ink used for the job.

Final step of prepress is plate ready for printing.

Digital prepress.

Since the early 1980s, printing and publishing technology has been evolving digital methods for production.

Text, images, and layout can be prepared either by the customer, the author, or the agency.

The text data are primarily prepared in "Word" format.

The picture objects of a printed product are usually available as photograph, slide, or reflection copy, and are scanned in, or digitized, for publication.

Graphics constitute the third main element of a printed page. They are generally generated in Freehand, Illustrator, or CorelDraw.

Layout programs are software packages allowing for flexible, creative work and for integrating the elements on pages or a sequence of pages.

Modern imposition programs offer virtually any imposition pattern in prepress.

Color management is the calibration of all input and output devices. Color management ensures optimum color reproduction. An important reason for using color management today is the correct output result will be achieved at the first attempt.

The proof should be a perfect sample of the later print run.

Digital proofing systems can be classified into two basic process variants based on intended use and quality required:

• soft proof;

• hard proof:

1)blueprint

2)imposition proof(layout proof)

3)color proof

4)screen proof

5)press proof

Blueprint and layout proofing are applications ideally suited to reasonably priced large-format printers and are normally equipped with ink jet printing units.

The color proofs created in this way serve as a guideline (reference) for the printer in charge of the production run.

Screen proofs it is the screen structure, which can also be simulated using a digital printing process.

Press proof is a test print of the data directly in a printing press.