Cellulose acetate safety film undergoes autocatalytic deacetylation, releasing acetic acid gas commonly known as vinegar syndrome. Early detection via A-D indicator test paper allows conservators to isolate degrading reels and insert zeolite molecular sieves into sealed storage cans.
A-D Indicator Strip Interpretation
When dye test strips change color from blue to yellow (pH <= 1.5), immediate quarantine and cold storage intervention are mandatory to prevent gas migration to neighboring acetate collections.