INVESTIGATIONS ON A MEDIAEVAL SPANISH ENAMELLED CIBORIUM

Autor:	Barbara H. Berrie, Shelley Sturman
Rok vydání:	1992
Předmět:	Cobalt glass Materials science Champlevé Enamel paint Metallurgy chemistry.chemical_element Conservation Copper humanities Corrosion Lead glass stomatognathic system chemistry visual_art visual_art.visual_art_medium
Zdroj:	Studies in Conservation. 37:11-15
ISSN:	2047-0584 0039-3630
DOI:	10.1179/sic.1992.37.s1.003
Popis:	A mid fourteenth-century Spanish ciborium began to show signs of corrosion while on display in a closed case. The ciborium is made of gilded copper and champleve enamel. The corrosion was found to be associated with a certain color of enamel. The enamel in the portions that evidence corrosion is itself much deteriorated. Though now a dull green-blue, it appears that it was once bright blue. Analysis shows that the deteriorated glass contains cobalt, which is probably the colorant. This enamel is a high potassium, low lead glass which is known to be unstable. Decomposition of this glass followed by leaching of components during a period of elevated relative humidity and temperature could account for the corrosion of the object. A fifteenth-century Spanish silver-gilt reliquary was found to have similarly deteriorated blue glass.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b65fb97f97bd9d7f7b855209077f862 https://doi.org/10.1179/sic.1992.37.s1.003 Zobrazit plný text záznamu