翻訳と辞書 Words near each other ・ Fire fighting in Finland ・ Fire Fire ・ Fire Flame ・ Fire flapper (tool) ・ Fire Flies ・ Fire for effect ・ Fire forming ・ Fire from Heaven ・ Fire from Heaven (comics) ・ Fire from Heaven (disambiguation) ・ Fire from the Sky ・ Fire from the Tomb ・ Fire Garden ・ Fire glass ・ Fire grid burnet ・ Fire hardening ・ Fire HD ・ Fire HDX ・ Fire hose ・ Fire hose vacuum ・ Fire hydrant ・ Fire høytider ・ Fire Ice ・ Fire in ancient Iranian culture ・ Fire in anger ・ Fire in Babylon ・ Fire in My Heart ・ Fire in Stubble ・ Fire in the Abyss ・ Fire in the Attic 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 Fire hardening ： ウィキペディア英語版 Fire hardening Fire hardening, also known as "fire-polishing", is the process of removing moisture from wood, changing its structure and material properties, by slowly and lightly charring it over a fire. This makes a point, like that of a spear, or an edge, like that of a knife, more durable. Pre-historic weaponmakers would rub the end of a selected wood pole against a smooth rock surface until a point was achieved. Then the point was heated in a fire, making sure to thrust the point into the coals. This put a light coating of carbon on the surface, which was then polished with a special stone, which ground fine particles of stone into the pitch which had been brought to the surface of the wood by the fire. Subsequent firings and polishings of the wooden tip of the spear would eventually form a hardened glaze consisting of pitch, wood particles and carbon on the tip which could eventually be even harder than a copper tip. This kind of technology was developed by primitive humans at least 400,000 years ago—long before flint or stone points. ==See also== * Wood working * Flame polishing 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「Fire hardening」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.