Spectroscopic analysis used to uncover the original paint colour of the Helsinki Government Palace tower clock faces

Kepa Castro, Ulla Knuutinen, Silvia Fdez-Ortiz de Vallejuelo, Maite Maguregui, Juan Manuel Madariaga, Raili Laakso
2016 Heritage Science  
The paint stratigraphy of the two clock faces from the tower clock of the Government Palace in Helsinki (Finland) was analysed in order to determine their original colour before restoration works. Paint cross-section samples from both clock faces were analysed by confocal Raman microscopy and scanning electron microscopy coupled to an energy dispersive X-ray spectrometer (SEM-EDS). The results revealed the complex superimposition of paint layers applied over the original black colour. FTIR/ATR
more » ... nalyses proved that the original paint was prepared with linseed oil-resin media. Most likely not all of the different layer colours were visible. Some of the layers were likely to have been a primer or for rust protection.
doi:10.1186/s40494-016-0100-7 fatcat:ygx276rwxjfzbj7ipmzu6g5inu