Fig. 5
Micro-FTIR spectrum taken from a red sample compared to spectra of reference materials: gypsum applied with whole egg (yolk and glair) and a sandy red rock sample collected from locality of the church
Fig. 5 | Heritage Science
Micro-FTIR spectrum taken from a red sample compared to spectra of reference materials: gypsum applied with whole egg (yolk and glair) and a sandy red rock sample collected from locality of the church
