Fig. 12From: Infrared chemical mapping of degradation products in cross-sections from paintings and painted objectsT’lakwa painted copper. a Distribution of calcium soaps obtained by integrating the calcium carboxylate peak in the R-FTIR spectrum (1585–1563 cm−1). b Distribution of copper soaps obtained by integrating the copper carboxylate peak in the R-FTIR spectrum (1625–1585 cm−1)Back to article page