Pulsed thermographic analysis of Herculaneum papyri.

The Herculaneum papyri represent an exceptional cultural treasure, providing invaluable insights into the philosophical, literary and historical landscape of the Greco-Roman world. However, their carbonization due to the eruption of Mount Vesuvius in 79 AD poses significant challenges for both textual legibility and structural analysis. This study illustrates the first application of Pulsed Thermography to the non-destructive analysis of these unique manuscripts. By employing an experimental setup comprising a couple of flashes providing the excitation and a thermal camera for recording the infrared emission from the sample, the technique proves to be an important tool for textual recovery, revealing writing almost not discernible to the naked eye. Furthermore, Pulsed Thermography provides structural information useful for restorers, such as the papyrus texture and adhesion points to paperboard, offering a valuable advantage over other imaging techniques. The results show the potential of the adopted method not only as a powerful tool for textual recovery but also for guiding conservation strategies ensuring a deeper understanding of Herculaneum papyri.