![]() ![]() ![]() G. Calcagno, E. Pummer, M. Koller, J. Cult. G. Calcagno, M. Koller, Nimmrichter, Restauratoren Blätter (Special Issue: LACONA I), 39 (1997) J. Delgado Rodrigues, A.E. Charola, in Jerónimos Monastery, the Conservation Intervention (Cadernos IPPAR, Lisboa, 2006), pp. M.I. Cooper, D.C. Emmony, J. Larson, Opt. M.I. Cooper, D.C. Emmony, J.H. Larson, in Proceedings of Conference on Conservation Science in the UK, Glasgow, UK, May (1993), pp. M.I. Cooper, D.C. Emmony, J.H. Larson, in Proceedings of the 7th International Congress on Deterioration and Cleaning of Stone, Lisbon (1992), pp. P. Bromblet, M. Labouré, G. Orial, J. Cult. of the LCP Congress (Ecole Polytechnique Fédérale de Lausanne, Lausanne, 1995), pp. V. Vergès-Belmin, in Preservation and Restoration of Cultural Heritage. 13 (Bayerisches Landesamt für Denkmalpflege, Munich, 1993) by R. Snethlage, V. Vergès-Belmin, Arles, 1993. V. Vergès-Belmin, C. Pichot, G. Orial, in EUROCARE-EUROMARBLE EU 496: Proceedings of the 4th Workshop, ed. of the RILEM/UNESCO Congress, Paris (1993), pp. V. Vergès-Belmin, C. Pichot, G. Orial, in Conservation of Stone and Other Materials, ed. (Ecole Polytechnique Fédérale de Lausanne, Lausanne, 1995), pp. G. Orial, in Preservation and Restoration of Cultural Heritage. G. Orial, J.P. Gaufillet, in Technologie Industrielle Conservation Restauration du Patrimoine Culturel, Colloque AFTPV/SFIIC, Nice (1989), pp. R. Salimbeni, R. Pini, S. Siano, G. Calcagno, J. Cult. J.F. Asmus, C.G. Murphy, W.H. Munk, in Developments in Laser Technology II, ed. on the Deterioration of Building Stones, La Rochelle (1972), pp. L. Lazzarini, J.F. Asmus, M. Marchesini, in Proceedings of the 1st Int. Further results concern the nature of the well-known problem of the yellowish appearance in stone cleaning, removal of biological growths and graffiti from stones, cleaning of bronze and iron artifacts and related aspects of laser conversion of unstable minerals, removal of calcareous stratification from wall paintings, and other features. We characterized the ablation phenomenology, optical properties, and photomechanical generation associated with the irradiation of optically absorbing varnishes using pulse durations of 10 and 120 ns. The study of the latter was confined to preliminary irradiation tests carried out on prepared samples. Besides extensively discussing the specific conservation and physical problems involved in stone and metal cleaning, a significant effort was also made to explore the application potential for wall and easel paintings. The innovative part is entirely dedicated to the extension of the application perspective of the Nd:YAG lasers by exploiting the significant versatility provided by their different pulse durations. Both the state of the art and new insights mainly focus on systematic approaches addressed to the solution of representative cleaning problems, including stone and metal artifacts along with wall and easel paintings. In the present work the application of laser cleaning in the conservation of cultural assets is reviewed and some further developments on the interpretation of the associated laser-material interaction regimes are reported.
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