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The cupellation method is used to separate alloy metals, by mixing equal amounts of lime and ash, or cement can be used to make a round shape pit according to the amount of metal, the alloys are alloyed. Melted in that pit with the help of a charcoal fire, through a pipe, the air is blown from the blower. When the alloy metal is completely melted, lighten it with an iron rod. Goes, some slugs of the alloy come to the surface which are taken out by an iron rod, and cover it with the wood burning above that its temperature should be 800/1000 ° C.
Limits the speed of the blower, when the process starts, lead burns out and fumes and in a short time all the mixed metals like lead, copper, zinc, arsenic, antimony or bismuth are either burned. And some metals absorb the cement.
When smoke stops, the process is completed, the remaining alloy has gold and silver,