I dipinti murali di Sonqi Tino:recenti indagini diagnostiche sullo stato conservativo

Portable unilateral NMR (Nuclear Magnetic Resonance) technique was used to study, in a non-destructive and non-invasive way, the stratigraphy of an ancient detached mural paintings from Nubia, belonging to a collection of mural paintings detached from Sonqi Tino, exhibited at the Near Eastern Museum Sapienza University of Rome. The monitoring of the state of conservation and the study of the constitutive materials of the painting were carried out before planning the restoration project. The first step of this study was performed in situ using portable NMR. The results obtained in situ allowed the planning of a minimal representative sampling campaign to perform a set of micro-invasive analytical techniques such as multinuclear solid state NMR, optical microscopy (OM), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), infrared and Raman spectroscopy. This second step of study was carried out with the aim of identifying and chemically characterizing the constitutive materials of the detached painting.