Glass findings may be used as archaeometric markers when sufficient information is available on the relations between composition, working techniques, archaeological type and provenance of raw materials and, possibly, the socio-economic context of production. In addition, detailed characterisation of alteration processes is essential, also as regards problems of conservation, suitable restoration treatment, and the environment of subsequent conservation. Within this context, at the Geosciences Department of Padova University a systematic study was carried out on glass from several archaeological sites in Italy, dated from the Roman to medieval times, in order to investigate the following aspects: 1) Bulk characterisation, with the aim of identifying raw materials and glass-making techniques [1-3]. 2) Possible sources of sand for glass production with particular emphasis to those from Campanian littoral which use is documented by historical sources (i.e. Pliny the Elder), but hotly debated as regards reliability [4]. 3) Alteration processes due to interactions between the geochemical environment of conservation and glass composition [1, 5-6]. The glass samples were selected not only according to archaeological indications, but also to the mineralogical and geochemical features of the environment. Thus, Roman-medieval archaeological sites, characterised by conservation in both submarine (the Roman ship Iulia Felix) and land-based conditions (Monselice, Grado, Vicenza, Pozzuoli, Garda) were chosen. Numerous and integrated analytical techniques were used: optical analyses, X-ray spectrometry, scanning and transmission electron microscopy, X-ray powder diffraction, Mössbauer spectroscopy, thermogravimetric and thermodifferential analyses, oxygen isotope analysis.

Indagini archeometriche su vetri dal periodo romano al medioevo: materie prime, tecnologie di produzione e processi di alterazione

SILVESTRI, ALBERTA
2007

Abstract

Glass findings may be used as archaeometric markers when sufficient information is available on the relations between composition, working techniques, archaeological type and provenance of raw materials and, possibly, the socio-economic context of production. In addition, detailed characterisation of alteration processes is essential, also as regards problems of conservation, suitable restoration treatment, and the environment of subsequent conservation. Within this context, at the Geosciences Department of Padova University a systematic study was carried out on glass from several archaeological sites in Italy, dated from the Roman to medieval times, in order to investigate the following aspects: 1) Bulk characterisation, with the aim of identifying raw materials and glass-making techniques [1-3]. 2) Possible sources of sand for glass production with particular emphasis to those from Campanian littoral which use is documented by historical sources (i.e. Pliny the Elder), but hotly debated as regards reliability [4]. 3) Alteration processes due to interactions between the geochemical environment of conservation and glass composition [1, 5-6]. The glass samples were selected not only according to archaeological indications, but also to the mineralogical and geochemical features of the environment. Thus, Roman-medieval archaeological sites, characterised by conservation in both submarine (the Roman ship Iulia Felix) and land-based conditions (Monselice, Grado, Vicenza, Pozzuoli, Garda) were chosen. Numerous and integrated analytical techniques were used: optical analyses, X-ray spectrometry, scanning and transmission electron microscopy, X-ray powder diffraction, Mössbauer spectroscopy, thermogravimetric and thermodifferential analyses, oxygen isotope analysis.
2007
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/1782466
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