PDF-basics
The file format PDF (Portable Document format) was developed by the company Adobe (http://www.adobe.com) in the early nineties from the page description language PostScript. PDF has replaced this language as a standard for the exchange from print data.
The advantages of PDF
Correctly generated PDFs are perfect print templates for print outs. They contain all required data, for example highly distraught pictures and all used fonts. The use is independently for different platforms and the file size is very small due to optimize compression. PDFs can be checked very well on the screen with free Adobe (early Acrobat) reader.
Purposes of PDF
The required use of the PDF file must be considered. With PDFs for electronic publications like presentations, operating instructions, CD and DVD for example a low file size, short loading times, encoding or hyperlinks are important factors. Nevertheless, for PDF-print data a correct and standardised subsequent treatment is most important. To reach this the ISO norms described below were created.
The ISO norms PDF/X
The purpose of these norms (http://www.pdfx3.org/) is the standardised passing on of digital print documents. Besides, the following specifications assume, among the rest, PDF/X-3 correspondent files:
- a ICC- profile must be embedded
- all used fonts must be embedded
- the overcrowding keys must be defined
- LZW compression is forbidden
- transparency functions are not permitted
- encoding PDF/X files are prohibited
- Pictures should have a resolution between 300-600dpi
PDF/X files can be provided with the job options PDF/X of Acrobat-Distillers 6.
For all using the applications Indesign CS3 and photo shop CS3 we can make provide joboptions for exporting to PDF/X-4.
Download Joboptions for PC and Macintosh
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