Table of Contents
Laser Chemistry
Volume 2006, Article ID 81750, 6 pages
http://dx.doi.org/10.1155/2006/81750
Research Article

Characterization of Stone Cleaning by Nd:YAG Lasers with Different Pulse Duration

1Istituto di Fisica Applicata “N. Carrara” (IFAC), Consiglio Nazionale delle Ricerche (CNR), Via Madonna del Piano 10, Sesto Fiorentino (FI) 50019, Italy
2Institute of Electronic Structure and Lasers (IESL), Foundation for Research and Technology Hellas (FORTH), P.O. Box 1527, Heraklion 71110, Greece
3Department of Physics, University of Crete, Heraklion 71003, Greece

Received 15 September 2006; Revised 15 December 2006; Accepted 27 December 2006

Academic Editor: Wolfgang Kautek

Copyright © 2006 Laura Bartoli 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.

Abstract

The present work is a comparative study on the laser cleaning of stonework using Nd:YAG lasers at different pulse durations. The ablation rate, the degree of cleaning, and the appearance of the treated surface were studied irradiating a simulated sample and a real stone artefact using three different Nd:YAG laser systems with pulse duration of 90 microseconds, 15 nanoseconds, and 150 picoseconds. To our knowledge, the picosecond laser is here used for the first time in stone conservation. Differences in efficiency and in cleaning result are shown and discussed.