Cupellation - definition of cupellation by The Free Dictionary
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Related to cupellation: fire assay
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.
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
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).