26 April 2007 Laser recleaning of a Bronze Age prehistoric dolmen
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Proceedings Volume 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 634635 (2007) https://doi.org/10.1117/12.739329
Event: XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2006, Gmunden, Austria
Abstract
Dolmen La Chianca (XVI-XV century B.C.) is one of the most important megalithic buildings in Europe for its state of conservation and for the great number of findings that were discovered there (human remains, ceramic vases, pendants, bronze objects, obsidian and silica blades etc.). The building was defaced by many writings made using different markers (permanent black, correction ink pen, ballpoint pen, pencil, water-based coloured markers). The writings were removed by using a Nd-YAG laser source (&lgr; 1064 nm with pulse duration; t 8 ns ; f 2 to 20 Hz ; energy per impulse up to 280 mJ). Degradation mapping and laser cleaning with photographs, taken before, during and after the process in situ, were carried out, then different laser parameters and techniques were used to remove different ink types. A first laser cleaning was operated on the same building in 1999 by Daurelio, but vandals defaced newly the monument, then a new restoration became necessary.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. Daurelio, G. Daurelio, S. E. Andriani, S. E. Andriani, I. M. Catalano, I. M. Catalano, A. Albanese, A. Albanese, } "Laser recleaning of a Bronze Age prehistoric dolmen", Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 634635 (26 April 2007); doi: 10.1117/12.739329; https://doi.org/10.1117/12.739329
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