Table 2 Results of the FORS analysis in Santa María de Cuevas
Color | Average spectral features (maxima position) | Pigment identified | |
|---|---|---|---|
Reflectance (nm) | Absorbance (nm) | ||
White | 1446, 1491, 1539, 1752, 1944, 2178, 2217, 2268 | Gypsum | |
Dark yellow | 550*, 601, 771 | 475, 893 | Ocher |
Orange | 567*, 621, 742 | 523, 845 | Iron oxide |
Blue | 516, 720* | 648 | Indigo |
Brown | 571*, 747 | 506, 847 | Iron oxide-rich earth |
Incarnate | 565*, 619, 737 | 525, 844 | Minium |
Green (wall) | 501–582 | 725 | Malachite + a blue pigment, probably indigo |
Green (ceiling) | 547 | 734 | Malachite |
Red 1 | 577*, 613, 745 | 526, 847 | Hematite |
Red 2 | 586* | 520, 560 | Cochineal |