Combining SERS and microspectrofluorimetry with historically accurate reconstructions for the characterization of lac dye paints in medieval manuscript illuminations

Researchers successfully identified lac dye paints in medieval manuscript illuminations using innovative spectroscopic techniques, revealing their molecular composition and formulation. By combining surface-enhanced Raman spectroscopy (SERS) with microspectrofluorimetry, the study provided a conclusive fingerprint of lac dye while offering insights into additional paint components like binders and fillers. Historically accurate reconstructions of lac dye paints, prepared according to medieval recipes, served as reference materials to enhance the interpretation of spectroscopic results. This multi-analytical approach, including Raman microscopy and micro-Fourier transform infrared spectroscopy, established a robust database for studying complex medieval dyes, advancing our understanding of their use in art and conservation.

Castro, R., Pozzi, F., Leona, M., & Melo, M. J. (2014). Combining SERS and microspectrofluorimetry with historically accurate reconstructions for the characterization of lac dye paints in medieval manuscript illuminations. Journal of Raman Spectroscopy, 45(11-12), 1172–1179. Portico. https://doi.org/10.1002/jrs.4608