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QINGDAO YOSION LABTECH CO., LTD.

Free member Since 2018

Shandong, China

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  3. Refractory Fire Assay Mabor/Cement/Magnisia/Bone Ash Cupel Crucible

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 subsequently treated to determine its precious metal content...

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