Infrared imaging for the analysis of a 16th-century canvas: Annunciation by Francesco Salviati, a case study

The study of artworks through advanced diagnostic techniques is essential for both their conservation and understanding. Non-invasive imaging methods, such as Active Thermography (AT) and Infrared Reflectography (IRR), provide valuable insights into the technical and structural aspects of paintings without compromising their integrity. This study focuses on the 16th-century Annunciation by Francesco Salviati, analyzing it using AT and IRR to assess its conservation state. AT revealed thermal anomalies corresponding to areas with compromised paint adhesion, while IRR allowed for the visualization of preparatory drawing and subsequent modifications. The combined application of these techniques highlighted structural weaknesses, defects, and areas affected by previous restorations. The findings emphasize the importance of a multimodal imaging approach in the investigation of historical artworks, showcasing how AT and IRR can complement each other to reveal a more comprehensive understanding of the artwork's preservation needs and historical context. This case study underscores the value of non-invasive diagnostic methodologies in art conservation and their role in the ongoing preservation of cultural heritage.