I posted about one of these videos way back when I started this blog but I think I can load it up here now. The other one I found on youtube.
Film used to be nitrate based which was highly flammable. It's now basically plastic based so melts but doesn't burn.
The film was so highly flammable it took special training to deal with it. It was a bad combination, highly flammable film and light so bright it would burn right through the film if it stopped moving.
Anyone who's seen Cinema Paradiso will have an idea what I'm talking about.
Nitrate film is also a reason that if you read through the history of movie theatres you'll notice how many of them burned down.
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