| Autor: |
GLIOZZO, E., SANTAGOSTINO BARBONE, A., TURCHIANO, M., MEMMI, I., VOLPE, G. |
| Předmět: |
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| Zdroj: |
Archaeometry; Apr2012, Vol. 54 Issue 2, p311-331, 21p, 1 Color Photograph, 1 Black and White Photograph, 4 Charts, 3 Graphs, 1 Map |
| Abstrakt: |
Twenty-six tesserae (red, orange, yellow, light amber, green, blue and white) from the balneum of the villa at Faragola (Ascoli Satriano, Foggia) have been examined by colorimetry, ICP-MS, ICP-OES and SEM-EDS. Different types of calcareous sands have been used as the source of silica (network former), also providing the stabilizing agent. A natron-type soda source served as the network modifier; however, the use of a sodium-rich plant ash and the recycling process have been hypothesized for the production of two tesserae (FT 1 red and FT 3 orange). The colouring and opacifying agents were Cu oxide (cuprite, orange), metallic copper (red), Pb antimonates (yellow), Ca antimonates (white), a mixture of copper (Cu2 +) and Pb antimonates (green), a mixture of cobalt (Co2 +) or copper (Cu2 +) and Ca antimonates (blue). The light amber tesserae should owe their colour to iron (Fe3 +) alone or associated with sulphide (S2−) and Ca antimonates. It is likely that the Faragola tesserae were locally produced in a secondary glass workshop. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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