From Frescoes to Paintings

Edwards, Howell G. M.; Vandenabeele, Peter; Colomban, Philippe

doi:10.1007/978-3-031-14379-3_9

Cited by 1 publication

(1 citation statement)

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“…The second part of the experiments was carried out on samples of painted stone prepared according to ancient recipes using red ochre, one of the most used pigments by wall painters [75,76]. Firstly, through measurements of the color changes, it was verified that the TiO 2 /OrMoSil treatment applied on the painted stone does not alter the original appearance of the colors.…”

Section: Of 18mentioning

confidence: 99%

Hydrophobic and Photocatalytic Treatment for the Conservation of Painted Lecce stone in Outdoor Conditions: A New Cleaning Approach

Bergamonti,

Potenza,

Scigliuzzo

et al. 2024

Applied Sciences

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Self-cleaning and hydrophobic treatments based on TiO2 and SiO2 nanoparticles are widely applied for the preservation of cultural heritage materials, to improve their resilience in polluted environments. Excellent results have been obtained on stone materials, but experiments on painted stone surfaces, such as wall paintings and polychrome plasters used in historic buildings, are still limited. In this work, we present a study on the use of water dispersions of TiO2 nanoparticles obtained via sol-gel and organically modified silica (OrMoSil) for cleaning and protective purposes on Lecce stone, a carbonate stone, widely used for its excellent workability but easily attacked by atmospheric agents and pollutants. First, we evaluated the harmlessness of the treatment on Lecce stone through colorimetric tests, water absorption by capillarity and permeability to water vapor. The photocatalytic activity of the TiO2 nanoparticles was assessed by photo-degradation of methyl orange and methylene blue dyes. The dispersion was then applied on painted samples prepared according to ancient recipes to confirm the effectiveness of the cleaning. The proposed TiO2/OrMoSil-based coating can act as a self-cleaning and protective treatment on lithic surfaces to prevent degradation phenomena and preserve the original appearance of the monument.

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Section: Of 18mentioning

confidence: 99%