翻訳と辞書 Words near each other ・ Tumdah' ・ Tumdak' ・ TUME ・ Tumba Laurent Fabrice ・ Tumba Madžari ・ Tumba Peak ・ Tumba Peak (Belasica) ・ Tumba Peak (Šar) ・ Tumba Silva ・ Tumba, Rwanda ・ Tumba, Sweden ・ Tumba-Ngiri-Maindombe ・ Tumbach ・ Tumbadén District ・ Tumbafrailes ・ Tumbaga ・ Tumbahangphe ・ Tumbala climbing rat ・ Tumbalalaika ・ Tumbalong Park ・ Tumbalovo ・ Tumbalá ・ Tumbang preso ・ Tumbao ・ Tumbarinu ・ Tumbarumba ・ Tumbarumba (disambiguation) ・ Tumbarumba Australian Football Netball Club ・ Tumbarumba Creek ・ Tumbarumba railway line 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 Tumbaga ： ウィキペディア英語版 Tumbaga Tumbaga was the name given by Spaniards to a non-specific alloy of gold and copper which they found in widespread use in pre-Columbian Mesoamerica and South America. ==Composition and properties== Tumbaga is an alloy composed mostly of gold and copper. It has a significantly lower melting point than gold or copper alone. It is harder than copper, but maintains malleability after being pounded. Tumbaga can be treated with a simple acid, like citric acid, to dissolve copper off the surface. What remains is a shiny layer of nearly pure gold on top of a harder, more durable copper-gold alloy sheet. This process is referred to as depletion gilding. 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「Tumbaga」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.