cupellation


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Related to cupellation: fire assay

cu·pel·la·tion

 (kyo͞o′pə-lā′shən)
n.
A refining process for nonoxidizing metals, such as silver and gold, in which a metallic mixture is oxidized at high temperatures and base metals are separated by absorption into the walls of a cupel.

cupellation

(ˌkjuːpɪˈleɪʃən)
n
1. (Metallurgy) the process of recovering precious metals from lead by melting the alloy in a cupel and oxidizing the lead by means of an air blast
2. (Metallurgy) the manufacture of lead oxide by melting and oxidizing lead
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References in periodicals archive ?
To improve quality like that of gold by cupellation, he forged a matrix to remove dross from evaluation.
it had contributed to exchange of values between East and West by achieving the large-scale production of high quality silver through the development of the Asian cupellation techniques transferred from China through Korea and the Japanese unique assemblage of numerous labor-intensive small businesses based upon manual techniques in the 16th century.
This method, known as cupellation, was being practiced as far east as Central Asia by the mid-fourth millennium BC and possibly even earlier in Southeast Europe as suggested by the hoard of silver objects from Alepotrypa Cave in southern Greece dated to the mid-fifth/early fourth millennium BC (Muhly 2002).