verb (used with object), cu·peled, cu·pel·ing or (especially British) cu·pelled, cu·pel·ling.
Origin of cupel
Examples from the Web for cupel
Then mix the dried precipitate with three times its weight of lead; fuse, scorify and cupel.The A B C of Mining|Charles A. Bramble
This is to smelt the cupel as described further on (p. 114), and to again cupel the resulting button of lead.
So that the event is here nearly the same as when Gold or Silver is refined on the cupel.Elements of the Theory and Practice of Chymistry, 5th ed.|Pierre Joseph Macquer
If you wish to know what proportion of silver is in this copper button, melt it in a cupel after adding lead.De Re Metallica|Georgius Agricola
Cupel the lead, and the resulting button will be free from all metals, except perhaps gold.