| Autor: |
Iafrate S; Istituto Centrale per il Restauro Ministero della Cultura (ICR), Via di San Michele 25, 00153 Roma, Italy., Sidoti G; Istituto Centrale per il Restauro Ministero della Cultura (ICR), Via di San Michele 25, 00153 Roma, Italy., Capasso FE; Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy., Giandomenico M; Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy., Muca S; Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy., Daniele V; Department of Industrial and Information Engineering and Economics, University of L'Aquila, Piazzale E. Pontieri 1, 67100 Monteluco di Roio, L'Aquila, Italy., Taglieri G; Department of Industrial and Information Engineering and Economics, University of L'Aquila, Piazzale E. Pontieri 1, 67100 Monteluco di Roio, L'Aquila, Italy. |
| Abstrakt: |
Consolidation of mural paintings in hypogea is challenging because of their severe microclimatic conditions, characterized by high humidity levels, low air circulation, the presence of salts efflorescence, and the detrimental growth of biodeteriogen agents. Traditional consolidant products show significant drawbacks when used in hypogeum. Organic compounds, such as acrylic emulsions, are bio-receptive and some inorganic consolidants, such as silica-based products, show a lack of compatibility with the original substrate, which could lead to a reduction in permeability and an increase in the mechanical resistance of the external layer. The presence of solvents in their formulations, particularly short-chain alcohols that can activate germination of fungal spores, leads to the release of great amounts of volatile organic compounds, which are particularly harmful in the hypogeic environment. To solve these problems, restorers of the Istituto Centrale per il Restauro (ICR) decided to use a new aqueous nanolime dispersion, NANOLAQ, consisting of pure and crystalline Ca(OH) 2 nanoparticles dispersed in water, produced by an innovative and sustainable patented procedure. After laboratory testing, the product has been applied on site, on a medieval mural painting in the Ss. Peter and Paul hypogeum in the UNESCO site of Matera (Italy), monitoring the performance in terms of cohesion of the paint layer and preservation of aesthetic features. |
