1,721,001 research outputs found
Il blu di smalto in dipinti murali: il caso del Correggio nella cupola del Duomo di Parma
No full texta cura di Vandini M
ARCHAEOMETRICAL INVESTIGATIONS ON SAN SEVERO MOSAIC TESSERAE(CLASSE, RAVENNA): THE USE OF DIFFERENT RAW MATERIALS FOR THE PRODUCTION OF OPAQUE GLASS IN VI CENTURY AD
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Thermoluminescence (TL) characterization and dating feasibility of ancient glass mosaic
No full textTo achieve a better comprehension of the thermoluminescence (TL) properties and dating feasibility of mosaic glasses, a study on the connections between chemical composition and general TL behavior of glass tesserae has been carried out. Elemental analysis of the samples has been performed through electron microscopy with microprobe, inductively coupled plasma and X-ray fluorescence spectrometry. Preliminary results, relative to the study of the TL behavior of different groups of glass mosaic tesserae, classified by provenance and by chemical analyses, are reported and discussed. © 2000 Elsevier Science Ltd
Once upon a glass. Cycles, recycles and reuses of a never-ending material.
Full text linkGlass can be considered a locus of meaning, a material which has been the repository of
traditional knowledge and technological expertise for at least three millennia. The history of glass
speaks of know-how, technological transitions, and contaminations of recipes for its manufacture,
which have changed across the world over the centuries. As the amount of recovered glass from
archaeological contexts is much lower compared to ceramic and metal finds, research has often
considered glass as a rare material. Furthermore, glass production, in ancient times as in the present
day, requires the use of selected raw materials and noticeable amounts of fuel, making reuse and
recycling practices necessary to foster sustainability, from both an economical and an environmental
perspective. Latin authors, such as Juvenal and Martial, reported buyers of broken glass in Imperial
Rome, presumably destined for recycling. Archaeometry has also provided data that allow, today,
to clarify different aspects related to production cycles, uses and reuses of a material that, starting
from the Roman age, became as common as modern plastics. From beakers and goblets reused with
different purposes to mosaic tesserae detached for making new mosaics or to be refused and employed
as “pigments” for colouring glass, this paper aims to provide an overview of reuse and recycling
practices of ancient glass through a discussion of selected case studies from Roman to Middle Ages,
showing how the cycle of this material can be framed as an actual example of sustainable circular
economy in the past
Glass artefacts conservation: finding materials and methods for glass vessels’ reconstruction
Full text linkThis paper will address art glass conservation, focusing on the search for the best products and methods to be employed in glass vessels’ reconstruction, including case studies. In 2000, an archaeological site was found in Padua (Northern Italy) where the Santa Chiara in Cella Nova Monastery once stood (1325–1797), and thousands of Renaissance artefacts came to light. Thanks to a collaboration between the Soprintendenza Archeologia, Belle Arti e Paesaggio per l’Area Metropolitana di Venezia e le Province di Belluno, Padova e Treviso and the University of Bologna, a huge conservative project started. The conservative intervention on the precious glass vessels became the starting point of a research on the best products to be employed in their reconstruction. More than for other materials, an analytical approach is necessary while dealing with glass: commonly employed techniques need to be adapted to suit features of every object, and new ones must be examined. Furthermore, testing and comparing well known products to most recent ones or to ones developed for other purposes is essential. In this study, an acrylic resin and four epoxy resins were tested, the latter both pure and added with three different colouring agents. Accelerated ageing tests were run to find out the products most resistant to discolouration through time. The results were compared with practical application’s tests to select the best combination of products and techniques. Finally, the intervention on two glass vessels, coming from Santa Chiara Monastery, is presented briefly
Obiettivi e focus del progetto PRIN 2009: continuità e discontinuità nelle produzioni vetrarie altoadriatiche tra il IX sec. a.C. e il XIV sec. d.C.
No full textRiassunto presentato al VII Congresso Nazionale di Archeometria, organizzato dall’AIAr, Modena, 22-24 febbraio 201
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