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There is a separate flag (meaning a switch that is either ON or OFF) that details whether the PDF/X-1a file has already been trapped.PDF/X-1a files contain extra operators that define the bleed and trim area.

The MediaBox defines the size of the entire document.

Either the ArtBox or the TrimBox define the extent of the printable area.

If the file is to be printed with bleed, a BleedBox must be defined.

It must be larger than the TrimBox/ArtBox, but smaller than the MediaBox.

The file needs to contain an output intent that describes the intended printing condition.

an output condition identifier, which is simply a text description of the intended print specifications (e.g.

There is a flag that indicates that the PDF file is a PDF/X file and which also details what type of PDF/X file it is.

In May 2000, PDF/X was first put to use when Time Inc. processed a Bayer ad that was delivered as a PDF/X-1 file.

In the meantime, other organisations have also started getting involved in the definition of PDF/X standards.PDF/X-1a is now an official ISO standard: ISO 15930-1.

PDF/X-1a:2001 – such a file has to be a PDF 1.3 file.

PDF/X-1a:2003 – such a file has to be a PDF 1.4 file but it should not contain any transparency and JBIG2 compression should not be used to compress images.īoth flavors share all of the restrictions that apply to PDF/X-1a.

The 2003 version simply came along because some newer software applications no longer supported the older PDF 1.3 file format.

Which other PDF/X flavors exist?īelow are all the PDF/X flavors that are either actively used in the market or may become popular in the future.

To print black&white, CMYK or spot color jobs.

Files may contain RGB/LAB/… colors in which case the user’s color management system needs to convert these to CMYK.

This standard was developed in Germany and Switzerland.

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