So excited to see ongoing development from 0dan0, with feedback from others here. I wish I had the time to commit toward testing these improvements. Hoping that in December I can re-scan the family film collection so my parents, aunts, uncles, and other family can see this material in glorious high definition.
I’ve been recently screening some previous scans (using Mac84s firmware) with some mild-to-moderate de-noised footage (and artificial grain added back in). Now I’m leaning toward skipping the denoise.
Anyways, on the topic of physically cleaning the film before scanning, I will share that I’ve generally benefited from cleaning with Film Guard. I put some on a pec pad and pinch top and bottom sides of film while running through a hand crank (attached to an old viewer). Doesn’t take very long, and helped to remove a lot of dust/dirt. Only occasionally did this cleaning result in a form of minor damage (small number of blue vertical streaks). After some research into this issue I landed on the idea that these were emulsion scratches from long ago (they were faint streaks before cleaning), and then my cleaning removed most of the flaky/loose emulsion where the film had been long ago scratched, leaving just some blue streaks. They weren’t horrendous and only occurred on a very, very small percentage of all the footage. The benefit of cleaning was worth the risk in my case.
Some of these cleaning techniques would break old splices and I’ve had to learn how to re-attach with press tape but I may redo those with cement for better longevity amidst various cleaning solutions.
Also, for some 70+ year-old film that have suffered from curling/warping (won’t lay flat and typically not advance through the machine) I am trying a year-long soak in Film Renew liquid to allow it to (hopefully) flatten back out and successfully scan. Will probably need to re-wind them and re-soak further). I even researched various curling irons to help flatten them but the heat seems dangerous and the process is not scalable for how many feet of film needs flattening.