Motion picture film? Try checking out the Film Preservation Guide. The "Understanding Film and How It Decays" section includes a few pages on recognizing varying film stocks (nitrate, poly, etc.). http://www.filmpreservation.org/preservation/film_guide.html Hope that helps.. best, Brandon. ____________________________________ Brandon Burke Archivist for Recorded Sound Collections Hoover Institution Archives Stanford University Stanford, CA 94305-6010 vox: 650.724.9711 fax: 650.725.3445 email: [log in to unmask] On Aug 14, 2008, at 9:31 AM, Jennifer Tobias wrote: > Hi everyone, > Can anyone recommend a good way to identify PVC film? I can't seem > to find any references to non-destructive tests you can use for > this. Any ideas are much appreciated! Thanks! > > -Jen Tobias > > Jen Tobias > Technical Services and Special Collections Coordinator > Naropa University > Allen Ginsberg Library > (303) 546-3505 > [log in to unmask]