Sorry, another question. So, the secret history of Star Wars link says the negative was printed onto film that was fading, and it had endured wear and tear from all the copies made throughout the 80s. Hence, the whole motivation to clean up and restore the film. So they chemically cleaned it, then the alterations were rendered in the computer and printed to film and then edited back into the negative. What prevents the negative from fading further over time? Did they have to chemically treat the negative with some kind of coating or something to prevent further damage over time?