patina
Sign in to savethumb|Copper roof on the Minneapolis City Hall, coated with patina thumb|upright|The Dresden Frauenkirche. The church was destroyed during the [[bombing of Dresden in 1945 and rebuilt from 1993 to 2005 with new material; the stones with the black patina are the parts that survived the firebombing from the original 18th-century church.]] thumb|Pre-colonial copper coin formerly used in the Copper Belt ([[Democratic Republic of the Congo and Zambia). The external layer has been weathered by moisture and rain, leading to the oxidation of copper.]]
Article
9 sectionsContents
- Usage
- Etymology
- Acquired patina
- Applied patina
- Repatination
- See also
- References
- Further reading
- External links
thumb|Copper roof on the Minneapolis City Hall, coated with patina thumb|upright|The Dresden Frauenkirche. The church was destroyed during the [[bombing of Dresden in 1945 and rebuilt from 1993 to 2005 with new material; the stones with the black patina are the parts that survived the firebombing from the original 18th-century church.]] thumb|Pre-colonial copper coin formerly used in the Copper Belt ([[Democratic Republic of the Congo and Zambia). The external layer has been weathered by moisture and rain, leading to the oxidation of copper.]]
Patina ( , or ) is a thin layer that variously forms on the surface of copper, brass, bronze, and similar metals and alloys (tarnish produced by oxidation or other chemical processes), or certain stones and wooden furniture (sheen produced by age, wear, and polishing), or any similar acquired change of a surface through age and exposure.