Quote Originally Posted by Photo Engineer View Post

The coating machine is left threaded with film after the job. Rethreading a mile of film support is a job you do not want! Never let the machine run out!

I can only imaging what a undertaking it would be to thread such a monster machine. I suppose the entire works has to be kept absolutely dust-free and temperature/humidity controlled. Does the coating machinery have some sort of "self-cleaning" apparatus?