Angela C. Santamaria participated in the International Congress of TechnoHeritage 2024 held in Santiago de Compostela from 25th to 27th September 2024. She presented a poster entitled “Impact of protective coatings on modern paintings: Influence of paint composition and substrate”.
Colour fading and vandalistic graffiti applications represent some of the most common forms of deterioration in contemporary muralism. Solar protectors and anti-graffiti products are applied to slow down such deterioration. In this research two solar protectors and two anti-graffiti products were tested on laboratory mock-ups to characterise the impact of these applications on painted surfaces and to analyse how paint composition and substrate nature influence this impact.
Overall, the protective coatings barely modify the colour; however, the alkyd green paint demonstrated a visible colour change when treated with anti-graffiti products and gloss solar protector, indicating a significant influence of the chemical nature of the paint on the paint-coating interaction. Anti-graffiti products, particularly the sacrificial type, show a significant increase in the gloss of the painted surfaces, while the nature of the substrate showed no influence on the paint-coating interaction.
Further investigations will be conducted to assess the durability and effectiveness of these products in the context of contemporary muralism.
Acknowledgements: This research is part of the CNS2022-135645 research project funded by MICIU/AEI/10.13039/501100011033 and, by “European Union NextGenerationEU/PRTR”. J.S. Pozo-Antonio was supported by the RYC2020-028902-I project funded by MICIU/AEI/10.13039/501100011033 and, by “ESF Investing in your future”. For more information: https://sosmurals.webs.uvigo.es/
