http://www.cnr.it/ontology/cnr/individuo/prodotto/ID317295
OIL OVERPAINTINGS REMOVAL USING ATMOSPHERIC PRESSURE PLASMA (Abstract/Poster in convegno)
- Type
- Label
- OIL OVERPAINTINGS REMOVAL USING ATMOSPHERIC PRESSURE PLASMA (Abstract/Poster in convegno) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Alternative label
Kamenova Veska1, Pavlov Angel1, Pavlova Ivelina1, Favaro Monica2, Nodari Luca2, Patelli Alessandro3, Voltolina Stefano3 (2014)
OIL OVERPAINTINGS REMOVAL USING ATMOSPHERIC PRESSURE PLASMA
in 6th International Congress "Science and Technology for the Safeguard of Cultural Heritage in the Mediterranean Basin", Athens, 6th International Congress "Science and Technology for the Safeguard of Cultural Heritage in the Mediterranean Basin"
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Kamenova Veska1, Pavlov Angel1, Pavlova Ivelina1, Favaro Monica2, Nodari Luca2, Patelli Alessandro3, Voltolina Stefano3 (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1Centre for Restoration of Artworks, Sofia, Bulgaria, veska_kamenova@abv.bg,ai_pavlov@abv.bg, ive_lina@hotmail.com; 2CNR - ICIS, Padua, Italy, favaro@icis.cnr.it, luca.nodari@icis.cnr.it;
3Veneto Nanotech SCpA, Venice, Italy, alessandro.patelli@venetonanotech.it, stefano.voltolina@venetonanotech.it. (literal)
- Titolo
- OIL OVERPAINTINGS REMOVAL USING ATMOSPHERIC PRESSURE PLASMA (literal)
- Abstract
- Plasma cleaning is a contactless method with soft chemical action and nanometer
precision; this makes it suitable for the highly demanding field of conservation of
cultural heritage artifacts. Oil overpaintings that obscure the original murals are a
common problem in the conservation of Eastern Orthodox churches. The removal of
the often multiple layers of overpaint is a challenging task. The traditional cleaning
methods, which combine chemical and mechanical treatment, are time consuming and
may damage the underlying pictorial layer. In this paper, we study the benefits of
combining plasma pretreatment with
the traditional methods. We
conducted experiments on removing
oil overpaint using plasma, as part of
the European project Plasma And
Nano for New Age \"soft\"
conservation (PANNA). We
performed preliminary tests on
laboratory samples as follows. First,
we prepared wall painting samples,
which we then coated with oil paint.
Second, we treated the surface with
compressed air plasma using a commercial plasma torch. Finally, the samples were
analysed using Fourier transform
infrared spectroscopy (FTIR). The
results show that the oxidative
plasma degrades the linseed binder
present in the oil paint, facilitating
its removal. We performed
additional tests on authentic
fragments from over-painted
murals. The fragments were
collected from the St. George
church in Golyamo Belovo,
Bulgaria. The original egg tempera
decoration, dating back from 1852,
was completely covered with oil
paint in 1921. No isolation layer was
used between the two. We first
treated the fragments' surfaces with plasma (see Figure 1) and then completely
removed the oil paint using organic solvent and a scalpel. As a next step, we
conducted an in situ cleaning in the St. George church. We treated three selected areas,
in the altar, following the methodology used for cleaning the fragments; see Figure 2.
The cleaning effect was compared with that obtained with only traditional methods.
Overall, our experiments are encouraging and demonstrate that plasma pretreatment
facilitates the removal of oil overpaintings by decreasing the treatment time and the
risk of damage to the pictorial layer. (literal)
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