Exploratory Analytical Study of a 20th century Portuguese Mural Painting by Júlio Resende (1917-2011)
The article presents an exploratory analytical study of a 20th-century Portuguese mural painting by Júlio Resende. The research utilised various techniques such as optical microscopy, visible spectrophotometry, handheld X-ray fluorescence spectroscopy (hXRF), dark field OM, SEM-EDS, and µ-FTIR to analyse the painting’s materials and techniques. The study revealed that the mural was executed in a lime fresco technique, with the use of cobalt blue, ochres, chromium green, green earth, and barium white pigments. Additionally, the presence of chrome orange and cadmium-based pigments was hypothesised. Detailed analysis of the plaster layering