Két középkori kályhacsempe fekete mázának meglepő anyagvizsgálati eredménye, és ennek magyarázata = Material testing report of the black glaze of two tile stoves from the Middle Age = Überraschendes Untersuchungsergebnis der schwarzen Glasur der 2 mittelalterlichen Ofenkacheln und dessen Erklärung

Véninger, Péter (2013) Két középkori kályhacsempe fekete mázának meglepő anyagvizsgálati eredménye, és ennek magyarázata = Material testing report of the black glaze of two tile stoves from the Middle Age = Überraschendes Untersuchungsergebnis der schwarzen Glasur der 2 mittelalterlichen Ofenkacheln und dessen Erklärung. A KAPOSVÁRI RIPPL-RÓNAI MÚZEUM KÖZLEMÉNYEI (2). pp. 173-182. ISSN 2064-1966 (print), 2631-0376 (online)

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Abstract

During the examination of the two black glazed tile stoves from Nyírbátor, we couldn’t decide if the black colour was the result of a technological mistake or it was coloured on purpose. Because of that, we have come to a decision to examine the tiles with the help of electron microscopy. Our hypothesis was that in the case of conscious color management we will find ordinary materials such as manganese (Mn), cobalt (Co), iron (Fe) in the glaze. On the other hand, if the black colour is the result of a mistake, it could be the consequence of an undue burning atmosphere. In this case, the outcome presumably would be a green or yellow glaze. The examination has come to a different conclusion.

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