noun
- a person who operates a cupel or performs cupellation, a metallurgical process used to refine precious metals by heating them in a small cup-shaped vessel
Usage: technical; metallurgy
Examples
- The cupeller carefully monitored the temperature to ensure proper refining of the gold.
- In the assay office, the cupeller prepared the precious metal samples for testing.
- Skilled cupellers were essential to the mint's quality control process.
- The cupeller used a bone ash cupel to separate impurities from the silver.