Current print quality certifications of 2017 can be viewed here:
Here, we would like to give a few examples of former certifications under PSO, which were also made for Fogra Forschungsgesellschaft Druck e.V. As there are several dozen printing houses, only a few individual companies are listed here.
Note: Our list does not claim to be exhaustive. We will be happy to provide interested parties with a complete list of all certified printing houses in the respective calendar year.