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Fig. 5 | Heritage Science

Fig. 5

From: Solvent-mediated extraction of fatty acids in bilayer oil paint models: a comparative analysis of solvent application methods

Fig. 5

a Imaging ATR-FTIR map showing the distribution of crystalline zinc soaps (1540\(\,\hbox {cm}^{-1}\)) in \(\text{pLOC}_{{17}}{-}\text{Znpol}\) bilayer model systems after 30 min ethanol exposure using Evolon-sq and b corresponding colorcoded FTIR spectra. The layer was divided in 50 slabs and spectra were averaged over each slab, red corresponds to a region close to \(\text {pLOC}_{17}\), green corresponds to the top of \(\text{Znpol}\) where ethanol was introduced

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