Vaccumate was one of those film preservation treatments they did back in the day along with Vaporate. This sample of a Vaccumate treated film is marked with a 3. Maybe they had different versions. It is all just guess work. I could not find out anything about either treatment.
Although you can't see it in the scan, the Vaporate film did seem to have a matte finish applied to the stock. I did not see any difference to Vacuumate treated film versus untreated film.
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Daniel D. Teoli Jr. Archival Collection
Daniel D. Teoli Jr. Small Gauge Film Archive
Daniel D. Teoli Jr. Advertising Archive
Daniel D. Teoli Jr. VHS Video Archive
Daniel D. Teoli Jr. Popular Culture Archive
Daniel D. Teoli Jr. Audio Archive
Daniel D. Teoli Jr. Social Documentary Photography