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Heritage 2018, 1(2), 365-376; https://doi.org/10.3390/heritage1020025

The Influence of Environment in the Alteration of the Stained-Glass Windows in Portuguese Monuments

1
Unidade de Investigação VICARTE-Vidro e Cerâmica Para as Artes, Campus de Caparica, FCT-UNL, Quinta da Torre, 2829-516 Caparica, Portugal
2
Instituto de Cerámica y Vidrio (ICV), Consejo Superior de Investigaciones Científicas (CSIC), c/ Kelsen 5, Campus de Cantoblanco, 28049 Madrid, Spain
3
Mosteiro de Batalha, Largo Infante D. Henrique, 2440-109 Batalha, Portugal
4
Mosteiro dos Jerónimos, Praça do Império, 1400-206 Lisbon, Portugal
5
Sé de Évora, Largo do Marquês de Marialva, 7000-809 Évora, Portugal
6
Departamento de Conservação e Restauro, Campus de Caparica, FCT-UNL, Quinta da Torre, 2829-516 Caparica, Portugal
*
Author to whom correspondence should be addressed.
Received: 22 October 2018 / Revised: 12 November 2018 / Accepted: 14 November 2018 / Published: 19 November 2018
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Abstract

This work presents the results of the exposure of soda-lime, potash-lime and mixed-alkali silicate glasses during ten and twenty months in different Portuguese monuments with historical stained-glass windows to characterize the influence of local environmental conditions. The glass samples were exposed in the Monastery of Batalha (Batalha), the Monastery of Jerónimos (Lisbon), and the Cathedral of Évora (Évora). A set of analytical techniques to assess the physicochemical effects were used, including optical microscopy and Fourier transform infrared spectroscopy. All the samples presented crystalline deposits on their surface; however, their quantity and nature depended on the atmospheric conditions during the days before the collection. Potash-lime silicate glass was the most altered glass in comparison with soda-lime and mixed-alkali silicate glasses. The samples from the Cathedral of Évora showed a high content of dust and salts on their surface but without severe chemical pathologies; however, those samples exposed in the Monastery of Jerónimos and the Monastery of Batalha presented alteration layers due to a high humidity environment. View Full-Text
Keywords: glass; degradation; stained-glass windows; Portuguese monuments glass; degradation; stained-glass windows; Portuguese monuments
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Palomar, T.; Redol, P.; Cruz Almeida, I.; Pereira da Silva, E.; Vilarigues, M. The Influence of Environment in the Alteration of the Stained-Glass Windows in Portuguese Monuments. Heritage 2018, 1, 365-376.

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