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Stained glass conservation refers to the protection and preservation of historic stained glass for present and future generations. It involves any and all actions devoted to the prevention, mitigation, or reversal of the processes of deterioration that affect such glass works and subsequently inhibit individuals’ ability to access and appreciate them, as part of the world’s collective cultural heritage. It functions as a part of the larger practices of cultural heritage conservation (conservation-restoration) and architectural conservation. Stained glass is lauded as one of the most beautiful and compelling forms of architectural decoration; however, it is also one of the most vulnerable (Brown et al. 2002, xi). The fabric of the glass itself, the paint or stain used to decorate it, and even the metal framework used to hold the design together are all at risk for deterioration, and will likely require conservation work to ensure their long-term survival. Historic glazing is subject to damage caused by continued exposure to pollution and the elements, on top of that resulting from inherent problems, such as the innate fragility of glass and any potential chemical instability of the materials involved (Brown et al. 2002, xi; Rauch 2004). Deterioration does not always occur gradually and may also occur suddenly and catastrophically, as the result of natural disasters (e.g. fire, extreme weather), accidents (e.g. improper handling, removal or treatment), or malicious damage (e.g. vandalism) (Brown et al. 2002, xi; Vogel et al. 2007). Owing to the delicate nature of the materials, and the incalculable historic and aesthetic value of stained glass work, any and all treatments should be planned and performed by professional conservators and craftspeople, who have been specially trained in the peculiarities of the medium. While preservation is the shared responsibility of all involved, including visitors, caretakers, and other stakeholders, it is imperative that professionals are consulted to ensure the continued integrity of the physical materials and their associated significance. For this reason, all projects should begin with a conservation plan that incorporates research in such topics as the history of the windows or building, the materials involved, and past alterations, as a key element of all conservation decisions. The type of conservation treatment employed should reflect this research, as well as the needs of the building as a whole, and should ''always'' be documented for reference in the future (CVMA 2004). For information on the creation, construction, and history of stained glass windows see Stained glass. ==Deterioration of stained glass== The primary aim of conservation is to slow the rate of deterioration, caused by various factors, to the point where the loss of significance, such as historic information and/or aesthetic value can be kept to a minimum (Pye 2001, Ch. 5). However, in the case of stained glass, these efforts are complicated by the nature of the medium itself. This is because a stained glass window, is a ‘complex object’ in that it is made from more than one component material, each with its own inherent risks and conservation needs (Pye 2001, 80). In addition to the most obvious component, glass, all windows will typically involve some sort paint or stain as decoration, metal strips, or ‘cames’ used to join the pieces of glass together, waterproofing materials, and fixing systems or frameworks used for additional support (Brown et al. 2002; Vogel et al. 2007). The condition of each component is important for the overall preservation of the window, as deterioration within one material can affect the others with varying degrees of severity. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stained glass conservation」の詳細全文を読む スポンサード リンク
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