25 years ago the first version of the Portable Document Format (PDF) was published. The deception among the users in print production was great because PDF 1.0 only supported RGB colors. No CMYK nor spot colors were possible. But in the last 15 years PDF became the most important format for the exchange of prepress data.
The 25th birthday of the pdf-format is a good opportunity for PDF expert Stephan Jaeggi, publisher of PDF-AKTUELL, to look back on how PDF has changed prepress production over these years.