THE EFFECT OF SUPERCRITICAL CARBON DIOXIDE EXTRACTION ON COLOR RETENTION AND PESTICIDE REDUCTION OF WOODEN ARTIFACTS
SUNG MO KANG, ACHIM UNGER, & J.J. MORRELL
Supercritical carbon dioxide extraction removed an average 60% of the original DDT from panels coated with pigments used on wooden icons, with minimal impact on the color quality of the pigments. While further studies will be necessary to refine extraction conditions and identify pigment components that are most susceptible to extraction conditions, the results indicate that SCF extraction may represent a promising method for nondestructively remediating pesticide-contaminated wooden artifacts.
The authors wish to thank Hiltrud Fritsche, sculpture restorer in Berlin, for the preparation of the test specimens.