Multi-technical non-invasive analysis to prevent deterioration in varnish-coated oil-paintings |
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| Alice Dal Fovo, Laura Maestro-Guijarro, Paula Maria Carmona-Quiroga, Raffaella Fontana, Francesca Rosi, Martina Alunni Cardinali, Aldo Romani, Lucia Comez, Cristiano Riminesi, Magdalena Iwanicka, Piotr Targowski, Magdalena Kowalska, Aggelos Philippidis, Paraskevi Pouli, Marta Castillejo, Mohamed Oujja |
- Abstract:
- Detecting early signs of varnish degradation is essential to prevent damage to underlying paintings. Despite extensive research, the mechanisms behind varnish alteration remain not fully understood, especially regarding the influence of pigments and binders in the paint layer. This study evaluated the effects of thermo-hygrometric and photochemical ageing on dammar and acrylic resins, both as standalone layers and as coatings on titanium white and yellow ochre oil-paints. A range of non-invasive techniques was used to assess the optical, mechanical, and morphological changes in the varnish and paint layers. The results revealed that varnish composition, ageing conditions, and underlying paint materials all significantly impact varnish degradation. The outcomes of this multi-analytical monitoring, which integrates point-based and imaging data, can profitably contribute to the creation of a digital replica for paintings – i.e. a digital twin – and support the training of automated systems to detect and identify early-stage degradation.
- Download:
- IMEKO-Metroarchaeo-2025-073.pdf
- DOI:
- 10.21014/tc26-2025.073
- Event details
- IMEKO TC:
- TC26
- Event name:
- TC26 MetroArcheo Conference 2025
- Title:
Metrology for Archaeology and Cultural Heritage
- Place:
- Bergamo, ITALY
- Time:
- 15 October 2025 - 17 October 2025