Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2583
Título: Diagnosis of pathologies in ancient (seventeenth-eighteenth centuries) decorative blue-and-white ceramic tiles : Green stains in the glazes of a panel depicting Lisbon prior to the 1755 earthquake
Autor: Silva, Teresa Pereira
Figueiredo, M. Ondina
Barreiros, Maria Alexandra
Prudêncio, Maria Isabel
Palavras-chave: Cerâmica
Azulejo
Património cultural
Preservação do património
Patologias
Difracção de Raios X
Espectrometria de raios X
Fluorescência de raios-X
Lisboa (Portugal)
Data: Mar-2014
Citação: Silva, Teresa P.; Figueiredo, Maria-Ondina; Barreiros, Maria-Alexandra; Prudêncio, Maria-Isabel - Diagnosis of pathologies in ancient (seventeenth-eighteenth centuries) decorative blue-and-white ceramic tiles : Green stains in the glazes of a panel depicting Lisbon prior to the 1755 earthquake. In: Studies in Conservation, vol. 59, nº 2, March 2014, p. 63-68
Resumo: Decorative panels of ceramic glazed tiles comprise a valuable cultural heritage in Mediterranean countries. Their preservation requires the development of a systematic scientific approach. Exposure to an open-air environment allows for a large span of deterioration effects. Successfully overcoming these effects demands a careful identification of involved degradation processes. Among these, the development of micro-organisms and concomitant glaze surface staining is a very common effect observed in panels manufactured centuries ago. This paper describes a study on the nature of green stains appearing at the surface of blue-and-white tile glazes from a large decorative panel with more than one thousand tiles, called Vista de Lisboa that depicts the city before the destruction caused by the 1755 earthquake. The characterization of green-stained blue-and-white tile glazes was performed using non-destructive X-ray techniques (diffraction and fluorescence spectrometry) by directly irradiating the surface of small tile fragments, complemented by a destructive scanning electron microscopy (SEM) observation of one fragment. Despite the green staining, analytical X-ray data showed that no deterioration had occurred irrespective of the blue or white color, while complementary SEM-EDX data provided chemical evidence of microorganism colonization at the stained glaze surface.
URI: http://hdl.handle.net/10400.9/2583
DOI: http://dx.doi.org/10.1179/2047058413Y.0000000094
ISSN: 0039-3630
Aparece nas colecções:RM - Artigos em revistas internacionais

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