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01-Sep-2016 23:33

Tin sources and trade in ancient times had a major influence on the development of cultures.In Europe, a major source of tin was the British deposits of ore in Cornwall, which were traded as far as Phoenicia in the Eastern Mediterranean.The earliest tin-alloy bronze dates to 4500 BCE in a Vinča culture site in Pločnik (Serbia).Ores of copper and the far rarer tin are not often found together (exceptions include one ancient site in Thailand and one in Iran), so serious bronze work has always involved trade.They are generally about 10 percent denser than steel, although alloys using aluminium or silicon may be slightly less dense.Bronze is a better conductor of heat and electricity than most steels.The discovery of bronze enabled people to create metal objects which were harder and more durable than previously possible.

It is able to hold a good polish and so is sometimes used in light reflectors and mirrors. By way of comparison, most bronzes are considerably less brittle than cast iron.

Initially, bronze was made out of copper and arsenic, forming arsenic bronze, or from naturally or artificially mixed ores of copper and arsenic, Tin bronze was superior to arsenic bronze in that the alloying process could be more easily controlled, and the resulting alloy was stronger and easier to cast.



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