Figure 3

FTIR spectra of the cross-section of paint-layers of historical railway car embedded into the polyester resin. The infrared spectra of first layer of the samples: sample KBr (red spectrum) – sample pressed in the KBr pellet, sample PS (blue spectrum) – sample covered by water glass before being embedded into the Polylite, sample PH (brown spectrum) – sample covered by dispersion of polyvinyl acetate (Herkules) before being embedded into the Polylite, sample P-C (pink spectrum) – sample coated with carbon monolayer before being embedded into the Polylite, sample P-Au (dark blue spectrum) - sample sputtered by gold before being embedded into the Polylite, sample PC (green spectrum) sample immersed into the cyclododecane solution before being embedded into the Polylite, and sample P (yellow spectrum) – sample embedded into the Polylite without any protective layer; together with the infrared spectrum of pure Polylite (violet spectrum).