High-resolution desktop microcomputed tomography for the evaluation of reducing treatments on historical glass suffering from manganese browning
Faculty of Sciences. Chemistry
Faculty of Design Sciences
Zwolle :Spa, 2013
ICOM-CC Glass and Ceramics Working Group Interim Meeting and Forum of the International Scientific Committee for the Conservation of Stained Glass, ICOM Committee for Conservation (Corpus Vitrearum-ICOMOS) / Roemich, Hannelore [edit.]; et al.
Recent advances in glass, stained-glass, and ceramics conservation ; 2013
University of Antwerp
Historical glass, especially non-durable mediaeval glass, can undergo corrosion. This sometimes results in the formation of dark-coloured manganese-rich inclusions or stains that reduce the transparency of the glass. A conservation treatment with reducing or chelating agents may be considered with the aim of improving the transparency. In this paper, high-resolution desktop microcomputed tomography (µCT) is used in combination with element-specific twodimensional imaging methods for in situ monitoring of manganese removal by hydroxylamine hydrochloride from an archaeological stained-glass sample suffering from manganese browning and from artificially corroded model glass samples. µCT also proved itself useful for the study of the (re-)penetration of manganese into the gel layer during artificial corrosion of a model glass.