Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40494-019-0249-y/MediaObjects/40494_2019_249_Fig5_HTML.png)
Fitzwilliam Museum, MS MCClean 20, fol 20v (a). ER-FTIR spectra collected on the pink robe (T1, purple spectrum in b), the light blue robe (T3, blue spectrum in b) and the green column (c). Characteristic bands for a lipidic binder, lead white, natural ultramarine and atacamite are shown; the pigment’s overtones and/or combination bands are labeled with o(functional group or compound)