Cellulose acetate film loses acetate groups on ageing which results in the formation of damaging acetic acid. Water-Leach Free Acidity Test (WLFAT) is the definitive technique to quantify acidity, but requires 1g film and 26 hours. ATR-FTIR spectroscopy is a non-destructive, rapid technique which was used to relate the concentration of C=O groups lost during deacetylation to the concentration of reference C-H groups. Comparison of WLFAT and ATR-FTIR showed similar trends in deterioration rate of new, slightly- and highly degraded films. Both techniques were equally effective at quantifying the degradation of film, though ATR-FTIR could not quantify onset of autocatalysis.
|Title of host publication
|International Council of Museums-Conservation Committee 14th Triennial Meeting 2005 The Hague
|Place of Publication
|James & James
|4 Sept 2005
|Published - 4 Sept 2005
- deacetylation vinegar-syndrome Water-Leach Free Acidity Test ATR-FTIR film cellulose acetate