Roman blue-green bottle glass: chemical–optical analysis and high temperature viscosity modelling

Chemical analysis, optical absorption spectroscopy and mathematical modelling of high temperature viscosity have been carried out on five 1st–2nd century AD Roman blue-green bottle glass fragments from Coppergate, York. Modelled viscosities indicate remarkable consistency within the sample set studi...

Full description

Saved in:
Bibliographic Details
Published in:Journal of archaeological science 2008-02, Vol.35 (2), p.302-309
Main Authors: Bingham, P.A., Jackson, C.M.
Format: Article
Language:English
Subjects:
Bottle
Colour
Glass
Metal industry
Methodology and general studies
Modelling
Optical
Prehistory and protohistory
Roman
Typology, technology and attribute analysis
Viscosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Chemical analysis, optical absorption spectroscopy and mathematical modelling of high temperature viscosity have been carried out on five 1st–2nd century AD Roman blue-green bottle glass fragments from Coppergate, York. Modelled viscosities indicate remarkable consistency within the sample set studied and support the suggestion that temperatures of ∼1000–1150 °C were required to remelt these glasses and to provide suitable viscosities for forming articles. Iron redox ratios (Fe 2+/ΣFe), analysed SO 3 contents and the absence of characteristic Fe 3+–S 2− amber absorption bands suggest that melting conditions for all studied glasses were mildly, rather than strongly, reducing (estimated pO 2 ≈ 10 −1–10 −6 bar). These furnace conditions are consistent with the effects of combustion gases and carbonaceous matter contained in the raw materials.
ISSN:0305-4403
1095-9238
DOI:10.1016/j.jas.2007.03.011