UV femtosecond laser cleaning of encrusted historical stained-glasses

Dados Bibliográficos

ID12512901
AutoresEvan Maina Maingi (0000-0003-4477-2240, Universidad de Zaragoza), María Pilar Alonso (0000-0002-4327-623X), María Pilar Alonso Abad (0000-0002-6268-9443, Universidad de Burgos), Germán F de la Fuente (0000-0002-0500-1745, Universidad de Zaragoza), Stéphan Dubernet (0000-0003-4278-3501, Centre National de la Recherche Scientifique), Yannick Lefrais (Université Bordeaux Montaigne), Rémy Chapoulie (0000-0001-9959-7940, Centre National de la Recherche Scientifique), Elodie Vally, L A Angurel (0000-0001-5685-2366, Instituto de Nanociencia y Materiales de Aragón, autor correspondente)
Ano2023
Volume61
Páginas100-108
Data de publicação2023-04-02
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoJournal of Cultural Heritage (JOURNAL)
Identificadores do periódicoISSN: 1296-2074 • E-ISSN: 1778-3674
EditoraElsevier BV (PUBLISHER)
DOI10.1016/j.culher.2023.03.005
OpenAlexW4362465136
IdiomaEN
Referências citadas34

Laser irradiation enables the removal of unwanted surface deposits from different materials in a safe and controllable manner. Laser parameters should be carefully selected to achieve the removal of the target contaminants without inducing damage to the substrate. Ultra-short pulse lasers have opened new opportunities for safe and controlled decontamination of cultural heritage materials because the thickness of material that is affected by the laser is limited. In this study, an ultraviolet femtosecond pulsed laser was used for the removal of unwanted encrustation formed on the surface of an historical colourless stained-glass sample from the Cuenca Cathedral in Spain. One of the sides of this glass exhibits a reddish-brown grisaille that also has to be preserved. A laser cleaning process has been designed to avoid heat accumulation while controlling the thickness of ablated material. In this context, a multi-step process was selected in order to be able to eliminate, in a controlled way, the crust layer without damaging the grisaille layer, or the glass substrate. In this case, laser irradiation in beam scanning mode with a pulse repetition frequency of 10 kHz proved to be effective for the safe cleaning of the glass. The latter was analysed before and after laser cleaning by optical and confocal microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray fluorescence, and Raman spectroscopy, confirming that the crust layer was effectively eliminated without damaging the surface

Composite material · Context (archaeology · Femtosecond · Irradiation · Laser · Layer (electronics · Optics · Optoelectronics · Raman spectroscopy · Scanning electron microscope · Substrate (aquarium · Ultraviolet · Cultural Heritage Materials Analysis · Laser Material Processing Techniques · Laser-induced spectroscopy and plasma · Materials Science · Geology