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Your cart is empty. Lot of 8 Cupels
Each Cupel will absorb 69.2 grams of lead.
Cupels are made from high quality dead burnt magnesia (MgO). Hard, smooth surface with consistency in weight and size. Provide exceptional results in gold mines, precious metal refiners, alloy melters, hallmarking, geological and test laboratories worldwide.
CUPEL DIMENSION is 1-3/4" across the top & 1-7/16" tall
The lead button for cupellation is typically generated in the crucible fusion from the fire assay process, but can also be produced by a scorification assay, or a bullion assay where the precious metal is wrapped in lead foil.
Typical cupellation furnace temperatures in gold and silver assays are 1650-1700F, but can vary with technique, air flow volume, and cupel material.
Trdhybrid
Reviewed in the United States on July 12, 2024
Cups arrived fast and none were damaged. Very happy
William J.
Reviewed in the United States on July 12, 2024
It broke in half it sucks
Aaron hagood
Reviewed in the United States on April 28, 2024
Cupels cracked jn half. When i used them pretty sure i lost a good amount of gold in my smelting forge.
Max Starr
Reviewed in the United States on September 12, 2023
Using the cupels I was able to refine some 14k gold scraps up to about 22k. They were super easy to use and worked exactly as they were supposed to.
Island Girl
Reviewed in the United States on May 13, 2023
I haven’t used these yet, but I read another person’s review, that these extract more of the contaminants in gold, leaving you a more pure gold.These are heavier and thicker than normal.They came in a “lpack of 8” for a very good price. They are #8 AM; 1 3/4 .... perfect for after melting a couple ounces of gold.
Rusty Goldpans
Reviewed in the United States on January 8, 2023
The media could not be loaded.
Shawn
Reviewed in the United States on December 31, 2021
Arrived early. Product was neat and secured nicely within packaging. Will be buying from again in the future.
Corey
Reviewed in the United States on October 17, 2020
Very well packaged, almost felt like prank wrapping, but everything made it without a single chip, and it came almost a week early!
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