Verdigris
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Verdigris is a common name for any of a variety of somewhat toxic copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition. Once used as
Naturally occurring verdigris on exposed metal in the Prague Metro.
One of the earliest uses of verdigris as a pigment in painting; Last Supper (1306) by Giotto Di Bondone
Raphael used verdigris for the green coat of Saint John, the left angel's frock, and other accents, in The Mond Crucifixion.
The Verdigris of the angels' costumes in Nativita Mistica by Botticelli darkened from bluish green to foliage green.
Copper
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Copper is a chemical element; it has symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure co
Verdigris
…Verdigris () is a common name for any of a variety of somewhat toxic copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition. Once used as a medicine and pharmaceutical…
Nat Copper
A copper disc (99.95% pure) made by continuous casting; etched to reveal crystallites
Unoxidized copper wire (left) and oxidized copper wire (right)
The East Tower of the Royal Observatory, Edinburgh; the original copper was installed in 1894 and the refurbished copper in 1994