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Refers to things like arsenic, cadmium, lead, mercury, selenium, etc. that are not expressed in the chemical analysis of a ceramic. Most ceramic raw materials are earthy substances and thus contain a wide array of trace elements and compounds.
List them with amounts if known.
| Tests | 
Trace Minerals
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| Typecodes | 
Material Tests
 Test conducted primarily on materials use to make bodies or glazes.  | 
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