title: Characterization of Laser Cleaning of Artworks.
abstract: The main tasks of conservators of artworks and monuments are the estimation and analysis of damages (present condition), object conservation (cleaning process), and the protection of an object against further degradation. One of the physical methods that is becoming more and more popular for dirt removal is the laser cleaning method. This method is non-contact, selective, local, controlled, self-limiting, gives immediate feedback and preserves even the gentlest of relief - the trace of a paintbrush. Paper presents application of different, selected physical sensing methods to characterize condition of works of art as well as laser cleaning process itself. It includes, tested in our laboratories, optical surface measurements (e.g. colorimetry, scatterometry, interferometry), infrared thermography, optical coherent tomography and acoustic measurements for "on-line" evaluation of cleaning progress. Results of laser spectrometry analyses (LIBS, Raman) will illustrate identification and dating of objects superficial layers.
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. jmarczak@wat.edu.pl.
authors.forename: Jan
authors.initials: J
authors.lastname: Marczak
authors.affiliation: Academy of Fine Arts in Warsaw, Wybrzeze Kościuszkowskie 37, 00-379 Warsaw, Poland. kossa@asp.waw.pl.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Koss
authors.affiliation: Institute of Physics, Nicolaus Copernicus University, ul. Grudziądzka 5, 87-100 Toruń, Poland. ptarg@phys.uni.torun.pl.
authors.forename: Piotr
authors.initials: P
authors.lastname: Targowski
authors.affiliation: Institute of Physics, Nicolaus Copernicus University, ul. Grudziądzka 5, 87-100 Toruń, Poland.
authors.forename: Michalina
authors.initials: M
authors.lastname: Góra
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. mstrzelec@wat.edu.pl.
authors.forename: Marek
authors.initials: M
authors.lastname: Strzelec
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. asarzynski@wat.edu.pl.
authors.forename: Antoni
authors.initials: A
authors.lastname: Sarzyński
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. wskrzeczanowski@wat.edu.pl.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Skrzeczanowski
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. rostrowski@wat.edu.pl.
authors.forename: Roman
authors.initials: R
authors.lastname: Ostrowski
authors.affiliation: Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland.
authors.forename: Antoni
authors.initials: A
authors.lastname: Rycyk
keywords: Laser cleaning; artwork diagnostics; laser spectroscopy