Agnese De Carlo, Valerio Graziani, Paolo Branchini, Luca Tortora
This work explores the effects of accelerated aging conditions on two yellow synthetic organic pigments with good light fastness: PY 1 and PY 139 also known as Hansa Yellow G (or Monoazo yellow) and Isoindoline Yellow, respectively. The reactivity of PY 1 and PY 139 in presence of reactive inorganic whites such as basic lead carbonate, titanium oxide, and zinc oxide was investigated. The accelerated aging process was achieved through UV irradiation in a home-made climatic chamber for a set of bilayer paint mock-ups. Bilayered samples were realized to simulate the painting technique of...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.092
· Download
Eleonora Marconi, Luca Tortora
In this work, we report an easy, fast, reproducible, and low-temperature microemulsion procedure for the large-scale production of titania nanoparticles (NPs). The synthesis involves a polycondensation reaction of alkoxide precursors during the heating at 70 °C. A W/O microemulsion with a volume ratio of 1:1 was obtained using cetylpyridinium bromide (CPB) as a cationic surfactant. Structural and functional characterization of the samples was conducted using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The photoactivity of the nanostructured titania was evaluated by...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.091
· Download
Francesca Boccaccini, Aurelio Barbetta, Elena Messina, Marianna Pascucci, Cristina Riccucci, Gabriella Di Carlo
Degradation processes in cultural heritage metal artefacts represents a critical issue since they can irreversibly compromise the conservation status of valuable works of art. The products used to hinder these processes are mainly based on harmful or toxic corrosion inhibitors and solvents. Namely, large amounts of organic solvents are typically used by conservators for the application and removal of protective materials. In the last decades, the search for new materials that can simultaneously satisfy protective, aesthetic and safety requirements is receiving an increasing attention. In...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.090
· Download
Arianna Ceci, Luca Lanteri, Claudia Pelosi, Paola Pogliani, Sabrina Sottile
This paper reports the results of the analysis performed on three wax Christ-children (wax Bambinelli) preserved in the monastery of Santa Rosa in Viterbo. The analysis was performed on the occasion of the restoration, recently concluded, with the aim at supporting the working operations. The characterisation of the materials was particularly relevant for this kind of objects because they are little studied being considered of lesser artistic relevance than other artworks. But the wax babies are very important for their religious values and for technical details and peculiarities: apart from...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.089
· Download
Angelja Kjara Surca, Mohor Mihelčič
Herein are discussed the possibilities of how to exploit vibrational spectroscopic and electrochemical techniques in the studies of protective coatings for bronze artworks. Protective coatings for bronze 85,555 are prepared on the basis of polyurethanes or fluoropolymers. Reflection-absorption infrared spectroscopy under near grazing conditions is described as a powerful tool for studying the surfaces of bronze when exposed to various conditions (solutions, strippers, temperature). Electrochemical techniques, especially the potentiodynamic polarization technique, are very powerful in the...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.088
· Download
Penka Girginova, Cristina Galacho
This communication reports the preliminary results of our ongoing research on the effect of addition of cellulose-derivatives, such as cellulose ethers, in the synthesis of calcium hydroxide (Ca(OH)2) micro-sized particles. Particles of Ca(OH)2 were synthesised without and with addition of different amounts hydroxypropyl methylcellulose (HPMC). The obtained particles were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). Our preliminary results anticipate that syntheses with addition of HPMC originated the...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.087
· Download
Erica Sonaglia, Maria Paola Bracciale, Maria Laura Santarelli
The removal of extraneous materials without changing artifacts original properties and appearance is a crucial aspect in the cleaning of cultural heritage. In this scenario, gels proved to be useful thanks to solvent retention and its controlled release on surfaces. In the past, synthetic polymer-derived gels attracted interest thanks to their good performance. However, in recent years, nanotechnologies and green chemical approaches have created great interest also in restoration and conservation applications. The aim of this paper is to demonstrate the possibility to use bacterial...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.086
· Download
Cecilia Giorgi, Marilena Cozzolino, Vincenzo Gentile, Paolo Mauriello
The research project aims to uncover the unknown territory and trace its origins. It s conducted by the ISPC CNR to study the historical and archaeological context of Borbona (Rieti, Italy) with the collaboration of the Department of Agricultural Environmental and Food Sciences (University of Molise) for the geophysical prospections. Despite the limited historical and archaeological studies on Borbona, unexpected discoveries emerged during the research. Through various activities, including surveys and analysis of findings, the project has identified ancient habitation areas and significant...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.085
· Download
Joel Aldrighettoni, Barbara Marana, Maria Grazia D'Urso
The vastness of the material permanences of the Great War within contemporary landscapes imposes on the stakeholders that want to take care of them the need to identify new operational tools capable to calibrate a map of intervention priorities. This contribution presents the elaboration of a methodological approach capable of dealing with the complexity of this fragile heritage through a knowledge-based skeleton useful for comparing different territorial areas by assigning them different testimonial gradients with respect to the level of knowledge of specific pre-established indicators....
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.084
· Download
Giulia Fiorini, Maria Alessandra Tini, Francesco Montelli, Gabriele Bitelli
Accurate three-dimensional (3D) data from indoor spaces holds significant importance in various fields like real estate management, industrial archaeology and Cultural Heritage. Villa Maraffa complex, located near Ravenna (Italy), served as a case study for employing and comparing advanced technology and sensors in surveying these contexts. To acquire data, the sensors used were Matterport Pro 2 and Leica RTC360. The first one, mainly developed for real estate surveys, has been chosen because of the efficiency and cost-effectiveness in generating point clouds, albeit with lower precision...
TC4 MetroArchaeo 2023
· TC4
· 2023
· 10.21014/tc4-ARC-2023.083
· Download