Analysis of Poul Gernes’ painted folding doors at Herlev Hospital

Abstract An analytical study of the painted folding doors at Herlev Hospital in Denmark has been performed in connection with the creation of new doors. The hospital which construction was completed in 1976 is one of the first polychrome hospitals in the world. The building has achieved international awareness not only as a piece of architecture but also as an artwork being the largest artistic decoration of a public space in Denmark. Besides the decoration of the walls and interior which colour scheme was designed by the Danish artist Poul Gernes, the hospital foyer includes 65 individual paintings and two painted folding doors, which were executed by Poul Gernes. The folding doors are the original doors from 1976 and have never been restored. The paint used for the decoration of the folding doors were analysed by micro-Raman spectroscopy, scanning electron microscopy–energy dispersive X-ray spectroscopy, micro-Fourier transform infrared spectroscopy, and pyrolysis–gas chromatography–mass spectrometry. The results showed, that the variant colours were created by the use of a limited number of pigments and consist of a mixture of inorganic pigments and synthetic organic pigments. The detected pigments were chrome yellow, chrome orange/chrome red, PY3, PR3, PR122, PB15, and PV23. Titanium white (rutile) was found in all paint and preparatory layers, and it was used as both a whitening agent in mixtures with other pigment and a filler material in the paint. The study also shows how the decorations were created and it hence relates to other studies of wall paintings from that period giving useful information for future restoration issues about the possible pigments and binder used.