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Heritage Science
Fig. 5 | Heritage Science

Fig. 5

From: Material characterisation of a painted beehive panel by advanced spectroscopic and chromatographic techniques in combination with hyperspectral imaging

Fig. 5

a Optical micrograph of the sample PK2-1 taken from the painted beehive panel PK2 (for the sampling location see Fig. 1a) with measurement points of Raman analyses. b Raman spectra obtained on the sample PK2-1, identifying ultramarine at R1 and Prussian blue at R2. (λ0 = 785 nm, 10 s exposition, 2 accumulations, ~ 2 mW power). c FTIR spectrum (transmission mode) of blue layer present on sample PK2-1, identifying glycerolipid binder, barium sulfate, Prussian blue, ultramarine, oxalate and carboxylate

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