Microbiological and compositional features of green stains in the glaze of the Portuguese 'Great View of Lisbon' tile panel

© 2015, Springer Science+Business Media New York. The “Great View of Lisbon” is one of the most remarkable blue-and-white Portuguese tile panels, which depicts the city before the tragic earthquake of 1755. This panel presents visible colored alteration in the glaze of tiles both from the exhibition and the depository of the Museu Nacional do Azulejo (Portugal). This work is a contribution to identify the origin of green stains in the glaze by using microbiological techniques, scanning electron microscopy with back-scattered electron imaging (SEM-BSE), Raman spectroscopy, and proton-induced X-ray emission (PIXE). The microbiological assays showed that the filamentous fungi were detected only at a frequency
JW and CA are thankful for the support by Grant CGL2010-16004 from the Spanish Ministry of Science and Innovation.