Pre-industrial glassmaking in the Swiss Jura: the refractory earth for the glassworks of Derrière Sairoche (ct. Bern, 1699–1714)

Eramo, Giacomo

doi:10.1144/GSL.SP.2006.257.01.15

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Journal article

Pre-industrial glassmaking in the Swiss Jura: the refractory earth for the glassworks of Derrière Sairoche (ct. Bern, 1699–1714)

DOKPE

Eramo, Giacomo Department of Geosciences, Mineralogy and Petrography, University of Fribourg, Switzerland

2006

Published in:

Geological Society, London, Special Publications. - 2006, vol. 257, no. 1, p. 187-199

English Fragments of the melting furnace and several crucibles of the glassworks of Derrie`re Sairoche are compared with local raw materials. Principal component analysis (PCA) based on the chemical composition and on the grain-size distribution of the archaeological and natural materials demonstrates that the analysed samples were made from the same raw material and that local clayey sands (Hupper, Side´rolithique) were exploited. Availability in situ of good raw materials made tempering unnecessary. Their high melting point (c. 1600°C) allowed good performance in service conditions at temperatures up to 1500°C. Moreover, because of low Fe₂O₃tot concentrations, batch-glass contamination was avoided.

Faculty

Faculté des sciences et de médecine

Department

Département de Géosciences

Language