I recently had the opportunity to visit a printing company in San Diego. I learned how terribly things can go wrong when preparing files for print and how the nice employees will feel about me when it happens. I imagined that they keep this old Heidelberg printing press (see photo) for the express purpose of feeding it designers who don't know the difference between CMYK and RGB, or don't manage their fonts properly. I had at least three panic attacks as it just so happened that one of my projects had just been sent to the printer and my client was awaiting the proof. I saw my fate in the second photo below if the file wasn't prepared properly.