Object

Planned object

Title: The long-term change in composition of Medieval woodash glass

Creator:

Wedepohl, Karl Hans

Date issued/created:

2007

Resource Type:

Article

Subtitle:

Archaeologia Polona Vol. 45 (2007)

Publisher:

Institute of Archaeology and Ethnology Polish Academy of Sciences

Place of publishing:

Warszawa

Description:

ill. ; 24 cm

Abstract:

Woodash glass characterized by potassium plus calcium instead of sodium plus calcium was the major type in European Medieval glass production. The exhaustion of sodium-based raw materials from Egypt caused a change to local sources during the Carolingian period. With the invention of Gothic architecture, glass production and the number of glasshouses increased, but the technical experience was limited, the glasshouses working at the lowest possible furnace temperature of 1200 degrees centigrade which required the high potassium concentrations of beech trunks instead of bulk trees. The latter sources with high calcium concentrations characterized the early and late Medieval glass production at higher furnace temperature. Lack of woods in England and France had to be compensated by mixing woodash with fernash. The late Medieval total production of glass panes in Germany was in the range of 30,000 tons

References:

Barrera, J. and B. Velde 1989. A study of French Medieval glass composition. Archéologie Médievale 19: 81-130 ; Brill, R.H. 1999. Chemical analyses of early glass, Vol. I-II. The catalogue/the tables. Corning. New York ; Freestone, I.C. 1995. An analytical investigation of glass from the retable. In The technique of the Westminster retable. Norwegian Altar Frontale, P. Binski and I.C. Freestone (eds). Acta ad Archaeologiam et Artium Historiam Pertinenta 11: 59-71 ; Gerth, K., K. H. Wedepohl and K. Heide 1998. Experimental melts to explore the technique of medieval woodash glass production and the chlorine content of Medieval glass types. Chemie der Erde 58: 219-32 ; Mitscherlich, G. 1963. Zustand, Wachstum und Nutzung des Waldes im Wandel der Zeit. Freiburger Universitätsreden N.F. 35. Freiburg ; Morey, G. W., F. C. Kracek and N.L. Bowen 1930. The ternary system K2O-CaO-SiO2. Journal of the Science of Glass Technology 14: 149-87 ; Mortimer, C. 1993. Assessment of window glass fragments and grozing debris from Westminster Abbey, London. Ancient Monuments Laboratory Report 83/93: 1-8 ; Newton, R. R. and D. Fuchs 1988. Chemical compositions and weathering of some Medieval glasses from York Minster, part I. Glass Technology 29: 43-8 ; Schmid, B., I. Krueger and K.H. Wedepohl 1996. Das Fundmaterial zweier mittelalterlicher Latrinen aus Mainz, Tritonplatz. Mainzer archäologische Zeitschrift 3: 127-231 ; Six, H. and H. H. Mader 1989. Spätmittelalterliche Bleiglasherstellung in der Umgebung von Grünenplan im Hils. Glastechnische Berichte 62: 73-5 ; Theobald, W. 1933. Technik und Kunsthandwerk im zehnten Jahrhundert. Des Theophilus Presbyter Diversarum Artium Schedula. Berlin ; Watzke, B. 2001. Materialwissenschaftliche Untersuchungen von Produktionseinrich-tungen und Produkten der spätmittelalterlichen Glashütte Schönbuch. Diplomarbeit Würzburg ; Wedepohl, K. H., 2003. Glass in Antike und Mittelalter Geschichte eines Werkstoffs. Stuttgart ; Wedepohl, K. H., H. Weiss and A. Kronz (to be published). Um die Jahrtausendwende hergestelltes Fensterglas aus Vreden im Münsterland

Relation:

Archaeologia Polona

Volume:

45

Start page:

155

End page:

162

Format:

application/octet-stream

Resource Identifier:

0066-5924

Source:

IAiE PAN, call no. P 357 ; IAiE PAN, call no. P 358 ; IAiE PAN, call no. P 356 ; click here to follow the link

Language:

eng

Terms of use:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitizing institution:

Institute of Archaeology and Ethnology of the Polish Academy of Sciences

Original in:

Library of the Institute of Archaeology and Ethnology of the Polish Academy of Sciences

Edition name Date

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