What Is Vinegar Syndrome
Vinegar syndrome is a form of acetate film decay caused by hydrolysis of cellulose acetate base. It releases acetic acid, giving the film a sharp vinegar smell and causing warping, shrinkage, and brittleness.
How to Identify Vinegar Syndrome
Early signs include a strong vinegar odor, soft or tacky film surfaces, and edge warping. Advanced stages show channeling, brittleness, and color shifts. Archivists use pH strips and odor detection to monitor degradation.
Prevention and Safe Handling
Store acetate film in cool, dry conditions, ideally below 70°F with 30 to 40 percent relative humidity. Use archival-quality containers and avoid sealed plastic that traps moisture. For professional preservation guidance, see the Library of Congress film preservation resources at https://www.loc.gov/rr/mopic/concern/degradation.html.
