Adobe’s Portable Document Format, was never designed for high-end graphics art production. Back in the early nineties, when it was first introduced, it was intended for cross platform office document sharing. But the graphic arts industry embraced PDF as a means of transporting content files from point to point, and PDF’s role as the foundation for print media workflows was rapidly confirmed throughout the industry. We should bare this in mind when considering PDF as the preferred file format for print production. There are good reasons for using PDF, but not all PDF files are suitable for output for quality printing.
PDF has become a de facto standard for graphic arts workflows because of its convenience, ubiquity and flexibility. The alternative to using PDF files as the basis for print production is to use either native files, meaning documents saved in the internal file format for the layout software, such as InDesign, Quark Xpress or perhaps Illustrator. We could also export the page content as postscript. But neither approach is ideal and there are benefits and drawbacks with both.
Application files
The problem with sending native files from a designer to a printer or prepress department is that the receiver needs to have the same software installed on their computer in order to be able to open the file. And that software needs to be the exact same version, and ideally running on the same type of computer platform, with the same version of the operating system. As if this want irritating and costly enough, all fonts and possible hyphenation and language modules need also to be in place and of the exact same version, as on the designer’s workstation.
Most layout software doesn’t embed images inside the page document, which is yet another source of possible errors. Instead they have pointers to the high resolution versions of images, which are generally stored somewhere else. This could be on the computer used to originate the file, or on an image server. Working with native files requires all of these variables to be taken into account, for the files to flow through production without mishap. Missing images or missing fonts, or both, are among the most frequent errors in prepress troubleshooting. These are all reason to work with PDF, where all file components from images to colours can be contained within a single file. It’s clear that PDF has mostly replaced Postscript as the preferred page description language. PDF files are easier to work with and less cumbersome to handle in print production than native layout document files from InDesign or Quark X Press. Preparing documents for print will perhaps never be childsplay, but using PDF files in general, preflighted and well prepared PDF/X files in particular, is the path to better, more secure file processing.
For more information on providing us with PDF files please don’t hesitate to contact us at The Printing House (Print Buying Direct)
Peter Harrison is Joint Managing Director of The Printing House Ltd of Crewe, Cheshire, UK.
Print Buying Direct is an online trading name of The Printing House Ltd., specialising in online print ordering. Our most popular products at the moment: Business Cards, Banner Stands, Flyer/Leaflet Printing, Poster Printing.
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