In the 1990s I went with a collegue from Tony Stone Images to oversee the printing of the Tony Stone Images Catalogue. Most of the time was spent inside a huge metal building containig thunderingly noisy Heidelburg presses, we were there to check the printed results with the approved proofs to be sure colour was as expected.
A fond memory is hearing a heavy rainstorm thrash the metal roof and overpower the sound of the presses.