《汉字解码学》47 “铜”是红铜时代的表志 47 "copper" is the performance of the red copper era.

《汉字解码学》47  “铜”是红铜时代的表志。

铜  甲骨文同与铜共是一字。《说文》注： “赤金也。从金，同声。”铜为一种淡红色金属。古人称作赤金。铜为金属元素，符号Cu，赤色、有光泽，富延展性，是热和电之良导体。铜可制各种合金、电器器材、机械等。

铜 [銅] (名) copper(Cu)

《维基百科》介绍：有记载的最古老的几个文明知道自然界中存在着自然铜，其应用有至少一万年的历史。据估计，铜最早在公元前9千年的中东发现，在伊拉克北部出土了8700年前的铜质坠饰。有证据显示在此之前人类使用的金属只有金和陨铁（但没有炼铁）。据信炼铜的历史发展顺序如下：（1）自然铜的冷加工、（2）退火、（3）冶炼、（4）失蜡法铸造。在东南安那托利亚，这四种冶金方式在公元前7500年的新石器时代初期几乎同时出现。不过，炼铜在世界各地独立出现，就像农业一样。公元前2800年以前的中国，公元后600年的中美洲，公元后九至十世纪的非洲都可能已经发现铜的冶炼方法。熔模铸造发现于公元前4500到4000年的东南亚。碳测年确定英国柴郡的阿尔德利埃奇在公元前2280年到1890年已经有铜的开采。生活在3300到3200年前的冰人奥茨出土时带有一把斧子，斧头是99.7%纯的铜，另外他的头发砷含量很高，这表明他从事过铜的冶炼。铜的使用经验有助于开发其他金属为己所用，特别是炼铜使人类发明了炼铁。

47 "copper" is the performance of the red copper era.

Copper Oracle with copper is a word. "Said the text" Note: "Red gold also from gold, with the sound." Copper is a light red metal. The ancients called gold. Copper for the metal element, symbol Cu, red, shiny, rich ductility, is a good conductor of heat and electricity. Copper can be a variety of alloys, electrical equipment, machinery and so on.

Copper (copper)

"Wikipedia" Introduction: There are records of several of the oldest civilized nature that there is a natural copper, its application has at least 10,000 years of history. It is estimated that copper was first found in the Middle East 9,000 BC, in northern Iraq unearthed 8700 years ago, the copper pendant. There is evidence that before the human use of metal only gold and meteorite (but no iron). It is believed that the history of copper development in the following order: (1) natural cold copper, (2) annealing, (3) smelting, (4) lost wax casting. In the southeast Anatolia, these four metallurgical methods in the early Neolithic period 7500 BC almost simultaneously. However, copper smelting occurs independently around the world, just like agriculture. China before 2800 BC, Central America in 600 AD, Africa in the 9th to 10th century AD may have found copper smelting methods. Investment casting found in 4500-4000 BC in Southeast Asia. Carbon dating to determine the British Cheshire Aldrich Edge in 2280 BC to 1890 has been the exploitation of copper. 3300 to 3200 years ago, the ice man Oates unearthed with an ax, the ax is 99.7% pure copper, and his hair arsenic content is high, indicating that he engaged in copper smelting. The experience of the use of copper to help develop other metals for their own use, in particular the invention of human smelting of iron.