RT Journal Article
T1 Evaluation of Accelerated Ageing Tests for Metallic and Non-Metallic Graffiti Paints Applied to Stone
A1 Sanmartín Sánchez, Patricia
A1 Cappitelli, Francesca
K1 Accelerated ageing tests
K1 Graffiti
K1 Coating
K1 Stone protection
K1 Gravimetric analysis
K1 Colour measurements
K1 Infrared spectroscopy
AB Graffiti are increasingly observed on urban and peri-urban buildings and their removalrequires a huge financial outlay by local governments and agencies. Graffiti are not usually removedimmediately, but rather over the passage of time, viz. months or even years. In this study,which forms part of a wider research project on graffiti removal, different methods (gravimetricanalysis, examination of digital images, colour and infrared measurements) were used to evaluate theperformance of accelerated ageing tests (involving exposure to humidity, freeze-thawing cycles andNaCl and Na2SO4 salts) for graffiti painted on stone. Silver (metallic) and black (non-metallic) graffitispray paints were applied to two types of igneous rock (granite and rhyolitic ignimbrite) and onesedimentary rock (fossiliferous limestone, i.e., biocalcarenite). The metallic and non-metallic graffitispray paints acted differently on the stone surfaces, both chemically and physically. Older graffitiwere found to be more vulnerable to weathering agents. The ageing test with NaCl and particularlyNa2SO4, both applied to granite, proved the most severe on the paints, yielding more detrimentaland faster artificial ageing of the type of material under study
PB MDPI
YR 2017
FD 2017-10
LK http://hdl.handle.net/10347/17577
UL http://hdl.handle.net/10347/17577
LA eng
NO Sanmartín Sánchez, P., Cappitelli, F. (2017). Evaluation of Accelerated Ageing Tests for Metallic and Non-Metallic Graffiti Paints Applied to Stone.
NO The authors are grateful to Lucía Naveiro Seijo (University of Santiago de Compostela,Spain), who carried out her degree research on this subject within the BioRemoGraf project. This work was partlyfinanced through grant GRC2014/028 (Xunta de Galicia). Patricia Sanmartín is currently financially supportedby a postdoctoral contract within the framework of the 2011–2015 Galician Plan for Research, Innovation andGrowth, Plan I2C, Modality B (2016 Call) with the project: “Light4Heritage: Lighting-based strategies to controlbiological colonization in the built heritage (2016-PG011)”
DS Minerva
RD 24 abr 2026