I came accross to very similar questions.
The first is older, the comments on the question helped the Q find its own A. But the Answer was never marked as excepted: Cannot print from LibreOffice, but can from a terminal
The second was written pretty recently and I commented that it was similar to the first: Printer works but docs can only print to file
I was reminded by another user that the answer on the first questions isn't very good, to which I agree. Still: I would like to mark the second beeing a duplicate of the first. Currently this isn't possible because the answer was not marked as accepted.