Min. Order Reference FOB Price
1000 Pieces US$0.22-1.00 / Piece
Product Description
Cement Cupel : 1. Made of cement. 2. Used for smelting and assaying. 3. High thermal shock resistance. During cupellation, the lead is oxidized to litharge (PbO), most of which is absorbed by the cupel. Gold, silver, platinum and other precious metals form a bead in the cupel. The bead is ...