Fig. 2From: Revealing Gauguin’s practice: multi-analytical approach of the Portrait de Suzanne BambridgeATR-FTIR spectra of the micro-fragment #1 taken from overpainted area in the background blue and a casein reference sample. Assigned bands: 3400–3200 cm−1: N–H stretching band; 3100–2800 cm−1: C–H stretching bands; 1660–1600 cm−1: C=O stretching band; 1565–1500 cm−1: C–N–H bending band; 1480–1300 cm−1: C–H bending band (see [6] p. 182)Back to article page