Nd:YAG long Q-switched versus short free-running laser cleaning trials at Chartres cathedral, France

Vergès‐Belmin, Véronique; Rolland, Olivier; Jourd'heuil, Irène; Guiavarc'H, Mikaël; Zanini, Alessandro

doi:10.1179/0039363015z.000000000202

Cited by 6 publications

(1 citation statement)

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“…Laser irradiation has been introduced more recently as a new cleaning technique for the conservation of cultural heritage materials, either as a complement or as a substitute to the conventional approaches [27][28][29][30][31][32][33]. In the last four decades, laser cleaning of cultural heritage materials has been a subject of interest and research within the heritage conservation community [11,32,[34][35][36][37][38][39]. The potential of lasers as cleaning tools for the removal of encrustations has continued to gain recognition, despite their initial limitations associated with low reliability and high costs [32,40].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Laser Cleaning of Corrosion Encrustations on Historical Stained Glass: A Comparative Study

et al. 2023

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The aim of this research work was to conduct a comparative study on the effectiveness of the application of chemical cleaning versus laser cleaning in the removal of surface congruent dissolution products from a potash-lime–silica historical stained-glass sample. EDTA was selected as the chemical cleaning agent. Laser cleaning was performed using a 238 fs pulse UV (343 nm) laser. The comparative cleaning studies were carried out on a stained-glass piece supplied by the Maison Lorin Glass Restoration Workshop from Chartres, France. Given the complex nature, irregular thickness and heterogeneity of the encrustations found on the glass, the two cleaning approaches were carefully performed step by step, while monitoring the process using an optical microscope. Raman spectroscopy and field emission scanning electron microscopy were used to characterize the changes induced on the sample surface during the cleaning process. The results demonstrate that the two cleaning approaches were able to eliminate the outer surface dark layer associated with carbon compounds, as well as the external part of the white layer generated by the crystallization of salts, formed with the dissolved elements after a reaction with the air. A comparison of the advantages and disadvantages of each method is also presented.

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