Illustrations from "Kodouzuroku", Editor Masuda Kou (1769-1821) , Artist Niwa Toukei (1760-1822), established during 1811-1816. It shows refining techniques of copper. Right Saobuki (making of copper ingot), Left Awasebuki (making of copper and lead alloy to adsorb silver on lead )

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Size: 5224px × 3356px
Location: National Archives of Japan
Photo credit: © Chronicle of World History / Alamy / Afripics
License: Licensed
Model Released: No

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