Fig. 4From: New insights into the deterioration of TiO2 based oil paints: the effects of illumination conditions and surface interactionsChange in the intensity for the 1710 cm−1 peak, the 1670–1610 cm−1 region measured at 1640 cm−1, and the 1168 cm−1 peak in a, c, e visible light and in b, d, f UV–vis light. The considered bands are normalized to the 1736 cm−1 ester peakBack to article page