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Tombac, as it is spelled in French, or Tombak, is a brass alloy with high copper content and 5-20% zinc content.〔http://www.market-metal.com/reviews/reviews_175〕 Tin, lead or arsenic may be added for colouration.〔Institute of Metals, ''Journal of the Institute of Metals Volume 43'', Institute of Metals: 1930〕〔http://www.schlenk.de/index.php?id=519&L=1&kat=1.1.1#719〕 It is a cheap malleable alloy mainly used for medals, ornament, decoration and some munitions. In older use, the term may apply to brass alloy with a zinc content as high as 28%-35%.〔〔 Tibor Eric Robert Singer, ''German-English dictionary of metallurgy: with related material on ores, mining and minerals, crystallography, welding, metal-working, tools, metal products, and metal chemistry'', McGraw-Hill: 1945: 298 pages〕 ==Etymology== The term ''tombak'' is derived from ''tembaga'', an Indonesian/Malay word of Javanese origin meaning copper. ''Tembaga'' entered Dutch usage concurrent with their colonisation of Indonesia. Likely, the term was used generically to describe Indonesian high-copper brass items, including gamelan gongs. It is one of the very few Indonesian loan words used in English, German, or Dutch. 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「Tombac」の詳細全文を読む スポンサード リンク
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