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Patina ( or ) is a tarnish that forms on the surface of copper, bronze and similar metals (produced by oxidation or other chemical processes); stone; a sheen on wooden furniture produced by age, wear, and polishing; or any such acquired change of a surface through age and exposure. Patinas can provide a protective layer to materials that would otherwise be damaged by corrosion or weathering. They may also be aesthetically appealing.
- Related: Copper in architecture
W.A.Franke,M.Mircea Plutarch report on the blue patina of bronze statues at Delphi: A scientific explanation
cool.conservation-us.org/jaic/articles/jaic44-02-004_indx.html - Web
A. Giumlia-Mair Colouring treatments on ancient copper alloys
www.archaeometry.dk/.../Giumlia-Mair,%20A.%3B%20Colouring%20treatments%20on%20ancient%20copper-alloys.pdf - Web
Cockrell, B. Colourful Corrosion:Black Bronze and its Enigmatic Patina
pia-journal.co.uk/index.php/pia/article/viewArticle/182/250 - Web
Gallery for «Patina»
Patina on Bronze Sculpture From the Historical-Artistic Point of View
www.northernlightstudio.com/patinalec.php - Web