8mm Forum: VS rears its' ugly head

This is topic VS rears its' ugly head in forum 8mm Forum at 8mm Forum.

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Posted by David Michael Leugers (Member # 166) on December 31, 2018, 06:26 PM:

I kept smelling an increasingly strong odor of VS and determined that I would ferret out which film reel was the offender. I narrowed the smell down to an area where I keep my 16mm editing equipment in plastic tubs with lids. When I opened the right one, it nearly made me sick. I could not believe the pungent odor and how incredibly strong it was. More than that, there was no 16mm movie film in there. A new, unused 1200ft reel of 16mm fullcoat magnetic sound recording tape was the culprit. This means that the long held theory that improperly fixed 16mm film causes VS is certainly not the only cause. Apparently the film base material (acetate) can turn VS when it feels like it...

Posted by Bill Brandenstein (Member # 892) on January 03, 2019, 05:26 PM:

There are reports of magnetic coatings adding to the acidity of a film base. Some blame it on the coating process itself, others on the magnetic materials, but we all know that anything that seals one or both surfaces of an acetate base will lead to vinegar much more quickly than not.

At least it wasn't a rare IB Tech print or something else precious to your library.

Posted by David Michael Leugers (Member # 166) on January 03, 2019, 06:34 PM:

Yeah, I was very appreciative that it was not one of my films gone bad. I tossed it in the garbage can outside. I wonder about all the fullcoat sound recordings for films that are out there as original elements of a film...

Posted by David M. Ice (Member # 6777) on January 06, 2019, 09:57 AM:

I’m a retired sound editor, and I spent many years at Fox. Our sound effects library was on 35mm mag stripe film, but I noticed that most of the original 35mm fullcoat mag stereo effects (1950’s vintage) had a lot of vinegar syndrome, and the odor was REALLY strong. When we found something like that we immediately had the track transferred to new fullcoat film (usually Mylar or polyester base) and discarded the acetate base original. I never encountered any vinegar on newer mag film, just the original masters. I don’t know if Fox ever started a restoration program of the mag music tracks from early stereo films. I do know that (for a while, at least) Reel 3 (if memory serves) of THE ROBE was missing (the four track stereo release master. At least the copy in the Fox vault!

Posted by David M. Ice (Member # 6777) on January 06, 2019, 09:58 AM:

I’m a retired sound editor, and I spent many years at Fox. Our sound effects library was on 35mm mag stripe film, but I noticed that most of the original 35mm fullcoat mag stereo effects (1950’s vintage) had a lot of vinegar syndrome, and the odor was REALLY strong. When we found something like that we immediately had the track transferred to new fullcoat film (usually Mylar or polyester base) and discarded the acetate base original. I never encountered any vinegar on newer mag film, just the original masters. I don’t know if Fox ever started a restoration program of the mag music tracks from early stereo films. I do know that (for a while, at least) Reel 3 (if memory serves) of THE ROBE was missing (the four track stereo release master. At least the copy in the Fox vault!

Posted by David Michael Leugers (Member # 166) on January 06, 2019, 02:58 PM:

Thanks for the info David. The preservation of film is so important, I hope the studios have taken all the efforts they can to save what remains.

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