Abstract
Five pigmented (azurite, lead white, verdigris and vermilion) and one unpigmented egg tempera paint films from a previous study were examined using gel electrophoresis for proteins and gas liquid chromatography-mass spectrometry (GC-MS) for lipids after artificial ageing.When compared to the unpigmented film, azurite and vermilion accelerated the cross-linking of proteins. During thermal ageing vermilion reduced the molecular weight of some proteins. Verdigris degraded the proteins in the egg tempera paint film. Lead white had little effect on the curing and ageing of the paint films. The effects of the pigments on lipids in the paint film was monitored with the loss of unsaturation and the emergence of a diacid series.
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