TY - JOUR
T1 - Evaluation of laser cleaning for the restoration of tarnished silver artifacts
AU - Palomar, T.
AU - Oujja, Mohamed
AU - Llorente, I.
AU - Ramírez Barat, Blanca
AU - Cañamares, Maria Vega
AU - Cano, Emilio
AU - Castillejo, Marta
N1 - Sem PDF conforme despacho.
info:eu-repo/grantAgreement/EC/H2020/690970/EU#
The authors acknowledge P. Navarro for providing the 99 wt% silver and O. Garcia for colorimetric measurements. This work has been funded by project CREMEL (Ref. HAR2011-22402), by a predoctoral FPI grant (BES-2012-052716) from the Spanish Ministry of Economy and Competitiveness (MINECO), by program GEOMATE-RIALES 2-CM (Ref. CAM, S2013/MIT_2914) from the Community of Madrid, and by EU project "Integrated Platform for the European Research Infrastructure on Cultural Heritage" (IPERION-CH, Ref. H2020-INFRAIA-2014-2015, grant no 654028). M.O. thanks CSIC for a contract. Finally, the authors want to mention the support of the Spanish Network on Science and Technology for the Conservation of Cultural Heritage (TechnoHeritage).
PY - 2016/11/30
Y1 - 2016/11/30
N2 - In this study we evaluate the laser cleaning of tarnished pure and sterling silver substrates using a nanosecond Q-switched Nd:YAG laser at 1064, 532 and 266 nm. To assess the effects associated with cyclic laser cleaning treatments, several cycles of tarnishing followed by laser cleaning were applied on silver coupons that were characterized by gravimetry, colorimetry, scanning electron microscopy, X-ray photoelectron spectroscopy and micro-Raman spectroscopy. According to the obtained results, none of the three wavelengths is recommended for laser cleaning of pure silver objects, while for sterling silver artifacts, the visible laser wavelength of 532 nm seems the most appropriate.
AB - In this study we evaluate the laser cleaning of tarnished pure and sterling silver substrates using a nanosecond Q-switched Nd:YAG laser at 1064, 532 and 266 nm. To assess the effects associated with cyclic laser cleaning treatments, several cycles of tarnishing followed by laser cleaning were applied on silver coupons that were characterized by gravimetry, colorimetry, scanning electron microscopy, X-ray photoelectron spectroscopy and micro-Raman spectroscopy. According to the obtained results, none of the three wavelengths is recommended for laser cleaning of pure silver objects, while for sterling silver artifacts, the visible laser wavelength of 532 nm seems the most appropriate.
KW - Cultural heritage
KW - Laser cleaning
KW - Silver
KW - Sterling silver
KW - Tarnishing
UR - http://www.scopus.com/inward/record.url?scp=84975882693&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2016.06.017
DO - 10.1016/j.apsusc.2016.06.017
M3 - Article
AN - SCOPUS:84975882693
SN - 0169-4332
VL - 387
SP - 118
EP - 127
JO - Applied Surface Science
JF - Applied Surface Science
ER -