Fig. 5From: Polyurethane coatings used in twentieth century outdoor painted sculptures. Part I: comparative study of various systems by means of ATR-FTIR spectroscopyFTIR spectra of 1KWBPU systems; Imron 1.2 HG-C clearcoat, Imron 1.5 Pr grey primer and Imron 1.5 ST-D direct-to-metal white topcoat. The three spectra all display a single band in the 1730–1650 cm−1 regionBack to article page