Group of four portraits
Thomas de Keijser and studio, 1600-50
The removal of varnish and overpaint from four portraits in the UvA C&R studio revealed damage that could be related to the pigmentation of different paint layers. The dark clothes worn by the sitters appeared very damaged, lead white containing passages had been well preserved.
Although the influence of pigmentation on paint sensitivity is well known, advice for safe treatment methods for such sensitive areas is lacking.