PATRICK LANDMANN / SCIENCE PHOTO LIBRARY PATRICK LANDMANN / SCIENCE PHOTO LIBRARY
Roman swords before and after restoration. The civilisation of Ancient Rome existed from the 9th century BC to the 5th century AD. These swords were completely covered with a corrosion product, and were X-rayed to discover what metals they were made from. They were then placed in a sodium sulphate solution to halt the corrosion, and then restored using micro-engraving tools and polishing tools. Photographed in France.
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