Difference between revisions of "Tarnish"
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== Description == | == Description == | ||
| − | A discoloration or dulling of a metal surface due [http://cameo.mfa.org/materials/fullrecord.asp?name=oxidation oxidation] or other chemical reactions. Atmospheric pollutants, such as [http://cameo.mfa.org/materials/fullrecord.asp?name=sulfur | + | A discoloration or dulling of a metal surface due [http://cameo.mfa.org/materials/fullrecord.asp?name=oxidation oxidation] or other chemical reactions. Atmospheric pollutants, such as [http://cameo.mfa.org/materials/fullrecord.asp?name=sulfur%20oxide sulfur oxides], react with [http://cameo.mfa.org/materials/fullrecord.asp?name=silver silver] to form a black [http://cameo.mfa.org/materials/fullrecord.asp?name=silver%20sulfide silver sulfide] tarnish. Addition of [http://cameo.mfa.org/materials/fullrecord.asp?name=indium indium] to the silver alloy will increase its tarnish resistance (Lewis 1993). [http://cameo.mfa.org/materials/fullrecord.asp?name=Copper Copper], [http://cameo.mfa.org/materials/fullrecord.asp?name=brass brass], and [http://cameo.mfa.org/materials/fullrecord.asp?name=aluminum aluminum] are also susceptible to tarnishing. |
[[File:11.10166_det2.jpg|thumb|Tarnish]] | [[File:11.10166_det2.jpg|thumb|Tarnish]] | ||
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== Authority == | == Authority == | ||
| − | * | + | * Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing) |
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * | + | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 |
| − | * | + | * Website address 1 Comment: AMOL reCollections Glossary -http://amol.org.au/recollections/7/c/htm |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:34, 24 July 2013
Description
A discoloration or dulling of a metal surface due oxidation or other chemical reactions. Atmospheric pollutants, such as sulfur oxides, react with silver to form a black silver sulfide tarnish. Addition of indium to the silver alloy will increase its tarnish resistance (Lewis 1993). Copper, brass, and aluminum are also susceptible to tarnishing.
Synonyms and Related Terms
silver tarnish
Additional Images
Tarnish
Tarnish
Tarnish
Authority
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Website address 1 Comment: AMOL reCollections Glossary -http://amol.org.au/recollections/7/c/htm