De l'origine du cobalt dans les verres

Gratuze, Bernard; Soulier, Isabelle; Barrandon, Jean-Noël; Roy, Danièle

doi:10.3406/arsci.1992.895

Cited by 90 publications

(87 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1560-1570), the presence of a considerable amount of arsenic was confirmed by previous PIXE analysis [6] and Raman signature was observed as such [9]. In fact, arsenic is a minor element commonly found in European cobalt ores: the Co/As ratio reaches 0.4 for the 16 th to 17 th century European glass and decreases to ~0.1 during the 18 th century [28,[51][52][53][54][55]. On the contrary, Asian cobalt ores are rich in manganese and iron [55][56][57][58] and require a firing under strong reducing atmosphere [59] to develop only the blue colour of Co 2+ ions [15].…”

Section: Pigmentssupporting

confidence: 50%

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Colomban

Arberet

Kırmızı

2017

Ceramics International

View full text Add to dashboard Cite

International audienceLimoges enamels on metal from the 17th to 18th centuries were analysed by non-invasive Raman microspectrometry with a mobile set-up in storage at the Musée des Arts Décoratifs (Paris) in order to identify the types of glazes and pigments used and to compare them with those found in Chinese cloisonné and falangcai enamels painted on metal and porcelain from the Kangxi and Yongzheng reigns (Qing dynasty). Certain French Jesuit and Chinese historical records report exchanges of technical know-how and artefacts during this period from France to China. Particular attention is paid to the detection of lead arsenate in blue and white enamels as well as in the whitened ones. Lead arsenate appears to be formed in blue enamels due to the high arsenic content of European cobalt ores exploited during the period in question

show abstract

Section: Pigmentssupporting

confidence: 50%

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Colomban

Arberet

Kırmızı

2017

Ceramics International

View full text Add to dashboard Cite

show abstract

“…While Tel Anafa and Jebel Khalid reduced glass composition and decolourant technology are closely similar, at Tel Anafa strongly coloured vessels form the majority of the assemblage [65: pp. [19][20][21], whereas this is not the case for the Jebel Khalid assemblage. Jennings [31: p. 56] concluded from comparison of Beirut and Tel Anafa bowls that although they were made in the same regional tradition, there were stylistic differences that suggested different secondary workshops, which could have been supplied with glass by a single primary location.…”

Section: Inter-site Compositional Comparisonsmentioning

confidence: 99%

Chemical characterisation of archaeological glasses from the Hellenistic site of Jebel Khalid, Syria by electron probe microanalysis

Reade

Privat

2016

Herit Sci

View full text Add to dashboard Cite

Background: Jebel Khalid is a single period Hellenistic site on the west bank of the Euphrates River in northern Syria. The occupation of the site dates from the early 3rd century BCE until its abandonment in the late 70s BCE. The so-called Governor's Palace, an administrative centre on the Acropolis of the site, overlooked this walled Greek garrison city. A considerable quantity of glass, predominantly drinking bowls, was excavated from this building complex. This study concerns the elemental analysis of glass samples from this assemblage by electron probe microanalysis (SEM-WDS). Results:The preliminary analyses presented in this report reveal that the Jebel Khalid glasses are of the silica-sodalime type fluxed with mineral soda, typical of late 1st millennium BCE glass composition. Manganese was employed as the chief decolourant. Glass compositions of monochrome bowls, core-formed and mosaic glass vessels are very similar, despite the different forms, colours and manufacturing techniques of the vessels. Conclusions:While the production centre for the Jebel Khalid glass remains elusive, the similarity to other published Hellenistic glasses from Greek mainland sites, Rhodes, Tel Anafa in Israel, and Gordion in central Turkey, indicates a tightly controlled composition with comparable batch ingredients. Without more comparative material of this date from the Near East and Greece, it is difficult to determine whether production of the vessel glass from this Seleucid site in the Near East occurred in the Aegean region or the Syro-Palestinian Levant, or both. Vessel style and archaeological context lean towards an Aegean connection, but until more comparative glass is analysed, and trace element and isotope data are considered, questions of primary and secondary production remain unresolved.

show abstract

“…In both these regions the cobalt is associated with arsenic. 30,31 The cobalt ore in Germany is associated with Ag-bearing minerals and Ni, Bi, Zn or Mo are usually present. Recently, it has been shown that early primary glass production (high Al, high Ca glass) took place at Ile-Ife in southwestern Nigeria and utilized cobalt associated with high levels of manganese to manufacture dark blue beads.…”

Section: Pigmentsmentioning

confidence: 99%

A Raman spectroscopic study of the Mapungubwe oblates: glass trade beads excavated at an Iron Age archaeological site in South Africa

Prinsloo

Colomban

2007

J Raman Spectroscopy

111

View full text Add to dashboard Cite

Oblate seed beads (2-4 mm) excavated on Mapungubwe hill, an Iron Age site in South Africa, were analysed with Raman microscopy and supportive techniques to determine the glass technology and pigments used to produce the beads. The Raman spectra and XRF analysis of the beads classify the glass as a typical soda/lime/potash glass similar to Islamic glass from the 8th century (Ommayad), but with higher levels of aluminium, iron and magnesium. The turquoise, bright green, bright yellow and orange colours were obtained by utilizing a combination of cassiterite (SnO 2 ) and lead tin yellow type II (PbSn 1−x Si x O 3 ). Doping with cobalt and manganese produced dark blue and plum-coloured beads. The Fe-S chromophore was detected through its resonance-enhanced spectrum in the black beads. Corrosion of the black beads was investigated and an organic phase detected on the beads, which might have influenced the corrosion process. This detailed profile of the glass technology used to produce the Mapungubwe oblates might eventually help to determine their provenance.

show abstract

De l'origine du cobalt dans les verres

Cited by 90 publications

References 2 publications

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

On-site Raman analysis of 17th and 18th century Limoges enamels: Implications on the European cobalt sources and the technological relationship between Limoges and Chinese enamels

Chemical characterisation of archaeological glasses from the Hellenistic site of Jebel Khalid, Syria by electron probe microanalysis

A Raman spectroscopic study of the Mapungubwe oblates: glass trade beads excavated at an Iron Age archaeological site in South Africa

Contact Info

Product

Resources

About