X-ray versus 3D terahertz imaging for sigillography science

This study focuses on the seals, especially European wax seals. We use THz spectroscopy imaging for non-destructive evaluation of natural materials. Using a time domain THz spectroscopy and imaging system, THz reflection images are generated in the 0.1-3 THz range and demonstrate that we can inspect the internal structure under a thick layer of old wax. X-Ray images will be used as a reference and the both technologies will be compared.