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Fig. 6 | Heritage Science

Fig. 6

From: An analytical study of the Huexotzinco Codex using X-ray fluorescence, fiber optic reflectance spectroscopy, and portable Fourier-transform infrared spectroscopy

Fig. 6

Digital photographs of Paintings I and II show areas of the orange pigment, along with FORS, ER-FTIR, and XRF analysis. Spectral features related to kaolinite are marked in the FORS (650, 910, 1391, 1414, 2158, and 2205 nm), ER-FTIR (3698, 3622, 1047, 1004, 540, and 468 cm−1), and XRF spectra (Si, S, K, Ca, Ti, Fe). ER-FTIR shows the paper substrate along with a spectrum of the orange area on Painting I (amate) and V (maguey) to represent both paper types

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