Nitrate identification section should be enhanced. Note Kodak tick marks and UV fluorescence, other companies' methods of identifying nitrate (ex., printed letter S), perf style (BH on positive film indicates nitrate), smell, thickness, etc. --JesseCrooks (talk) 20:08, 23 March 2020 (PDT)

Cleaned this page's formatting up, added information about vinegar syndrome. Added image of edge markings for safety film. Added a little more info on Nitrate film and a link to a detailed resource about I.D and handling. --Rlyon (talk) 14:45, 21 April 2020 (PDT)

Add info about diacetate, which was used for 35mm as early as 1909. Many prints of ambiguous base in the years preceding the switch to triacetate are diacetate. Most early 16mm is also diacetate. Note smell (mothballs/camphor) and other characteristics. --JesseCrooks (talk) 18:42, 26 April 2020 (PDT)