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Bronze Disease


Bronze Disease
Key Pages:
Brown University
Providence, RI 02912
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Bronze disease is a form of corrosion that affects bronze artifacts. It manifests itself as either a powdery green substance on the surface of the metal or as a warty or waxy film over the surface of an artifact. To the untrained eye, it may simply resemble a natural patina. However, while a patina is not destructive, bronze disease most certainly is.
In reality, “bronze disease” is not the result of bacteria, as the name would suggest, but the result of a complex chemical reaction. It is known as bronze disease because the reaction produces a green powder on the surface of bronze artifacts that resembles a fungus. This corrosion is much like rust on iron. This corrosion is caused by a circular set of reactions that involve the chlorides of a copper alloy and water. Bronze disease is triggered by the presence of water in this equation. It might take just one humid day to activate the ....

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UW to study ancient coins seized at U.S.-Canada border


UW to study ancient coins seized at U.S.-Canada border
By Associated Press
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BELLINGHAM– Dozens of ancient coins seized in 2017 at the U.S.-Canada border in Blaine have been transferred to the University of Washington to be studied, authorities said.
“These 51 Greek Hellenistic and early Islamic coins had no legal providence associated with them to validate if they were lawfully acquired and imported to the United States,” said a statement by Homeland Security Investigations Pacific Northwest, which has the authority under federal law to lead investigations involving illegal importation and distribution of cultural property and art.
Agency documents on the coin transfer said a suspect returned to the U.S. in 2017 through the Blaine border crossing after he was refused entry into Canada, The Bellingham Herald reported Thursday. Customs and Border Protection searched the suspect’s vehicle and discovered the coins, which were similar to ....

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