Detection of NaCl located in mural painting by stimulated infrared thermography

Abstract

In this work, we study the possibilities of stimulated Infrared Thermography for NaCl detection in Avignon calcareous stones. We show experimentally that the presence of salts leads to an increase in local thermal effusivity and to a decrease in maximum temperature induced by the photothermal flash analyze. We show then, that measurement of these parameters leads to the NaCl detection.

Sodium sulfate crystallisation monitoring using IR thermography

“…It has proven to be an important non-destructive technique for civil engineering works even for those requiring special attention as in the case of cultural heritage [36]; [37]; [38]; [39]; [40]. One of the last applications of this technique was laboratory detection of salts [41]; [42] and also in real artworks [43]. This non invasive and non destructive technique was recently used for the study of compounds crystallisation as in Parsa et al, (2015) [44] who studied CuO droplet evaporations.…”