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51.1 MB (51.0 MB compressed)
3654 x 4890 pixels
31.0 x 41.4 cm ⏐ 12.2 x 16.3 in (300dpi)
NATIONAL PHYSICAL LABORATORY Â© CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY NATIONAL PHYSICAL LABORATORY Â© CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY
Copper pipe deposits. Green copper-containing deposits inside a copper pipe. These are usually a form of verdigris, where cuprous oxide combines with moisture and carbon dioxide to form copper carbonate. Photographed at the National Physical Laboratory, Teddington, UK.
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