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IGBO UKWU BRONZE
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In Asia and Europe, bronze working was carried out
before iron working. The reverse seems to be the case in Black Africa. Bronze,
an alloy of copper and tin, was first used artistically, as far as is known, in
the third millennium B.C. among the Sumerians. Two methods of working were used:
Ancient metallurgists discovered that it is easier to cast an alloy of copper and tin (bronze), copper and zinc (brass), or copper, tin and lead (leaded bronze), than copper itself, because the alloy reduces the melting point thus making it flow much more easily than unalloyed copper. Scientifically speaking, most of the objects referred to in this book as bronze are really not bronze, hut it is preferred to retain this name to describe all copper alloys since the word has already gained much currency.
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