翻訳と辞書 Words near each other ・ Glass City Rollers ・ Glass cliff ・ Glass cloth ・ Glass Cloud ・ Glass Cloud – Single ・ Glass coach ・ Glass cockpit ・ Glass code ・ Glass coloring and color marking ・ Glass Creek ・ Glass crusher ・ Glass cutter ・ Glass Cutter (song) ・ Glass databases ・ Glass delusion ・ Glass disease ・ Glass Duo ・ Glass Eels ・ Glass electrode ・ Glass Elevator Media ・ Glass Enclosure ・ Glass enclosure ・ Glass engraving ・ Glass etching ・ Glass Eye (band) ・ Glass Eye Pix ・ Glass family ・ Glass fiber ・ Glass fiber reinforced concrete ・ Glass Fleet Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Glass disease ： ウィキペディア英語版 Glass disease Glass disease, also known as sick glass, is a degradation process encountered in art conservation. Glass disease is caused by an inherent fault in the chemical composition of the original glass formula. Usually, inadequate calcium oxide causes the alkalis in the glass to remain water-soluble at a low level. Exposure to higher levels of relative humidity during storage or display causes these salts to hydrate and leach out of the glass. Upon a reduction of relative humidity, these hydrated salts can then form a crust on the surface. This process causes a complex disintegration of the glass which can be identified through a variety of symptoms. One such sign is the aforementioned crusty deposits which can form a visible hard alkaline coating on the surface. Another symptom is a distinctive network of fine cracking, also called ''crizzling'', which can reduce the transparency of the glass or even threaten the integrity of the structure. ==References== * (Conservation of Glass ) 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「Glass disease」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.