I went through a Printing Technologies at our local junior college to get a degree in desktop publishing. it was 20 years ago and they were slowly getting rid of their light tables, stat cameras and darkroom. A couple of years earlier, they were teaching courses in stripping. Back then, highly trained printers were able make negs to burn printer plates. I'm sure that skill in plate making is a lost art. Some print shops go direct to plate without even using image setter negs to burn the plate.