Figure 2

FTIR spectra of the cross-section of paint-layers of historical railway car embedded into the acrylic resin. The infrared spectra of the first layer of the samples: sample KBr (red spectrum) – sample pressed in the KBr pellet, sample DCt (blue spectrum) – sample immersed into the melted cyclododecane before being embedded into the Dentacryl, sample DC (pink spectrum) sample immersed into the cyclododecane solution before being embedded into the Dentacryl, and sample D (dark blue) – sample embedded into the Dentacryl without any protective layer; together with the infrared spectrum of pure Dentacryl (violet spectrum).