Early stage of weathering of medieval-like potash–lime model glass: evaluation of key factors |
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Authors: | Lucile Gentaz Tiziana Lombardo Claudine Loisel Anne Chabas Marta Vallotto |
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Institution: | 1.Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA),Universités Paris-Est Créteil et Paris Diderot CNRS,Créteil, Cedex,France;2.Laboratoire de Recherche des Monuments Historiques (LRMH),Champs-sur-Marne,France;3.Stazione Sperimentale del Vetro (SSV),Murano-Venice,Italy |
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Abstract: | Purpose Throughout history, a consequent part of the medieval stained glass windows have been lost, mostly because of deliberate or
accidental mechanic destruction during war or revolution, but, in some cases, did not withstand the test of time simply because
of their low durability. Indeed, the glasses that remain nowadays are for many in a poor state of conservation and are heavily
deteriorated. Under general exposure conditions, stained glass windows undergo different kinds of weathering processes that
modify their optical properties, chemistry, and structure: congruent dissolution, leaching, and particle deposition (the combination
of those two leading together to the formation of neocrystallisations and eventually crusts). Previous research has studied
the weathering forms and the mechanisms from which they are originated, some others identified the main environmental parameters
responsible for the deterioration and highlighted that both intrinsic (glass composition) and extrinsic (environmental parameters)
factors influence glass degradation. Nevertheless, a clear quantification of the impact of the different deterioration extrinsic
factors has not been performed. |
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