In-situ determination of the state of conservation of paint coatings on the kiosk of Guadalajara using THz-TDS

On site measurements of historically accumulated paint layers on the kiosk of Guadalajara were taken using a terahertz time-domain spectrometer. Sub-surface air gaps produced by delamination were found on various regions of the structure. The occurrence of the air gaps correlates with the geographical orientation of the sections analyzed.