The Jewel and Its Setting

Henderson, Kenneth B.

doi:10.5951/mt.44.8.0542

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enamel composition can give information about production time and place and succours the classification of the object. [ 1–4 ] Most of the medieval émaux champlevés are made of strongly coloured and opacified soda lime silicate glass. Through the whole production time of émaux champlevé objects, different glass types have been used for their making.…”

Section: Introductionmentioning

confidence: 99%

Studying glass on metal: Raman analysis of medieval champlevé enamelled objects

Röhrs

Fenoglio

Reiche

et al. 2020

J Raman Spectroscopy

View full text Add to dashboard Cite

Medieval champlevé enamelled objects are from copper sheets decorated with glass. The enamels were analysed by Raman spectroscopy to study the compositional differences in the glass matrix. Additional analyses were carried out by element analytical methods such as μ‐X‐ray fluorescence analysis and environmental scanning electron microscopy with energy dispersive X‐ray analysis. The two most frequently used glass types are mineral soda lime glass opacified with antimony compounds and vegetal soda lime glass with a more significant addition of PbO, opacified with SnO2. The enamel composition can succour the classification of the object regarding production time and place.The wavenumber of the bending and stretching regions, δmax and υmax, and the polymerization index Ip were extracted from Raman spectra, and results were interpreted with respect to the so‐called glass families from the literature. The two most frequently used glass types can be distinguished in the plot of Ip versus υmax. For further differentiation, the Si‐O stretching υmax against Si‐O bending δmax plot was exploited. This plot allowed a separation of glass types which superimposed in the plot of Ip versus υmax, such as mixed alkaline glass and soda lime glass with added PbO. The small spot size and sensitivity of Raman analysis for lead and alkaline components allow obtaining complimentary data on compositional differences and heterogeneities of the glass matrix, which are difficult to detect by common laboratory micro‐X‐ray fluorescence analysis.

show abstract

Section: Introductionmentioning

confidence: 99%