Preliminary Laser Cleaning Studies of a Consolidated Prehistoric Basketry Coming from the Pile Building of Fiavè-Carera in the North-East of Italy

Belli, Romina; Miotello, Antonio; Mosaner, Paolo; Toniutti, Laura; Bazzanella, Marta

doi:https://doi.org/10.1155/2006/64690

Laser Chemistry

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Lasers in the Preservation of Cultural Heritage

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Research Article | Open Access

Volume 2006 | Article ID 064690 | https://doi.org/10.1155/2006/64690

Preliminary Laser Cleaning Studies of a Consolidated Prehistoric Basketry Coming from the Pile Building of Fiavè-Carera in the North-East of Italy

Romina Belli,¹Antonio Miotello,¹Paolo Mosaner,¹Laura Toniutti,¹and Marta Bazzanella²

Academic Editor: Marta Castillejo

Received20 Jul 2006

Revised06 Nov 2006

Accepted30 Nov 2006

Published28 Jan 2007

Abstract

In the archaeological field, some specific advantages are recognized to laser cleaning, like, for example, the absence of mechanical contacts with the sample. The cleaning procedures generally involve a multilayer structure (dust, dirty, organic deposits, and, in some cases, consolidant substances). In this work, prehistoric wood samples (found and consolidated in 1970s) have been laser irradiated (KrF excimer laser) in order to restore their original surface aspect. A certain amount of burned matter was also present. Samples came from a fragment of a prehistoric basketry found in the lake dwelling site of Fiavè-Carera, Trento, Italy (1500–1400 BC). It was observed that the laser cleaning effects are strictly dependent on the irradiation parameters (power density and number of pulses). Efficient material removal was possible by using appropriate energy density. Moreover, for lower laser energy density, special structures appeared on the surface of the consolidating substance that we attributed to heating-induced stresses on the consolidant surface.

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Copyright

Copyright © 2006 Romina Belli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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