Thanks for shopping at Rosewind Mining Supply!
If you require assistance please contact us
Premium bone ash tapered Cupels 1 9/16 inch diameter by 1.28 inch tall, tapered, with 41.7 grams lead absorbing capacity each. For use with the Kwik Kiln® or other furnace to cupel the lead button.
Cupelling is a part of assaying, and has been an absolute test of gold, silver, and platinum for over 2000 years. It can also be used at any time to prove or disprove precious metals. The Kwik Kiln® Cupelling Kit can be used as a mini-assay lab so to speak.
To test anything in which you believe might be gold, silver or platinum, simply grind a small amount of your material, mix it with some powdered lead or lead wool wraped around it, put it in a cupel and place it in the Kwik Kiln® or Furnace. In about 30-40 minutes you will have a bead of precious metals or maybe no bead at all, as the case may be.
The heated lead oxidizes creating hot litharge, a liquid that destroys all minerals except the precious metals. Everything is destroyed and dissolved and the precious metals are drawn into the lead. The cupel acts as a blotter for the litharge and all of the lead will oxidize leaving only the precious metals as a button on the center of the cupel.