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28 janvier 2025
- ISIDORE Id: 10670/1.59ecf2...
- hal: hal-04918243
- doi: 10.1007/978-3-031-77122-4_5
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info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-031-77122-4_5
Mots-clés
Egyptian blue Cobalt frit - Kiln slag Western Desert Calcium phosphate Bone ash Faience 18th dynasty sherdsSujets proches
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Howell Edwards et al., « First Cobalt Blue Pottery », HALSHS : archive ouverte en Sciences de l’Homme et de la Société, ID : 10.1007/978-3-031-77122-4_5
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Résumé
The chapter details studies concerning the first use (~1500 BCE) of cobalt ores for the preparation of a blue decoration and discusses the interpretations since the first studies and clearly illustrates the difficulties and inaccuracies of this type of work. Cobalt-decorated sherds from the 18th Dynasty Nile Valley occupation sites and from the Western Desert Oases together with cobalt- containing alum and kiln slag are examined. The cobalt frit applied to the sherds, often over a slip coating suggests that at least some of the cobalt, nickel and zinc ions have replaced magnesium ions within the diopside structure. Kiln slag would suggest that the kiln had been used for faience or cobalt frit production directly related to production of Egyptian blue. This is strongly indicated by the presence of calcium phosphate (from bone ash) which has been detected in both Egyptian blue and in the cobalt pigment.
