Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40494-019-0249-y/MediaObjects/40494_2019_249_Fig2_HTML.png)
Comparison between the ER-FTIR spectra collected on unpainted parchment and on different binders painted on parchment. From bottom to top: parchment (black), gum Arabic (dark cyan), egg white (magenta), egg yolk (red) and whole egg (blue). The main diagnostic bands are indicated