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Film base: Difference between revisions
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*Acetate base prints can suffer from vinegar syndrome if not stored at the proper temperature and humidity levels. | *Acetate base prints can suffer from vinegar syndrome if not stored at the proper temperature and humidity levels. | ||
'''Vinegar Syndrome''' is a type of film decay where heat, water, high humidity cause the acetic acid in the film base to break down and escape. It is something that only happens to acetate film bases. | '''Vinegar Syndrome''' is a type of film decay where heat, water, high humidity cause the acetic acid in the film base to break down and escape. It is something that only happens to acetate film bases. | ||
*Signs: Film smells like vinegar. Other things like film cleaner may cause a print to "smell funny" but a vinegary smell is associated specifically with Acetate Film Base Degradation aka "vinegar syndrome". Film begins to shrink and warp, becomes less flexible and more brittle. ''Note: Acetate film prints may also become more brittle over time, but this does not mean they have vinegar syndrome.'' | |||
*Handling: Make sure prints they are kept cool and dry, and separate out any prints you suspect of having vinegar syndrome (even the beginning stages) as it can spread from one print to another. Clean projectors thoroughly with 99.9% isopropyl alcohole after screening prints you suspect may have it. There is no reversing the process, but cold storage can halt it. See the "Resources" section of this page for more detailed information about storage of film prints and testing for vinegar syndrome. | |||