engleski

Multi-slice computer tomography (MSCT) as a non-destructive diagnostic method in the field of conservation-restauration of underwater archaeological objects

Hard-core deposits of calcifications on the surface of archaeological objects are causing great difficulty in diagnosing the condition of the surface layer and the structure of the objects. This kind of problem appeared during analysis of fragments of L2 amphorae’s neck discovered during first underwater examination of the bay of the first Hellenistic colonies in Croatia named Pharos, later a Roman settlement Pharia, today Stari Grad, on the island Hvar. Underwater research as well as analysis of finds was conducted by Arts Academy Split (UMAS). Fragment of the amphora’s neck was the part of first registrated ancient coastline in the bay. Fragment was covered with a hard crust of calcification. Under the calcification there was a sight of stamp of the workshop that had made this amphora. Given the scientific value and uniqueness of the finding and the fragility of the stamp, to avoid any damages a scan with MTSC was made that virtually eliminated plaque calcification. Beneath layers of calcification the scan showed letters PLATO. MSCT scan of amphorae’s neck enabled 3D images of object as well as an insight into the internal structure of the object. There are clearly visible mixtures in clay, cracks within the walls of the container and material weaknesses created due to the method of the baking process. All these information are essentially to chose right metode of restoration and conservation of objects. MSCT is powerfull non-destructive diagnostic method in the field of conservation- restauration. It is used by Departement of Conservation and restauration of UMAS as basic diagnostic method.

Multi-slice computer tomography (MSCT) ; non-destructive diagnostic method ; conservation-restauration ; underwater archaeological objects

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