fire assay cupel

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XTL is designed using industrial-leading technologies. They are mainly CAD design, 2D & 3D printing, and Gait balance analysis tech, and so on. .
We aim to provide the highest quality fire assay cupel.for our long-term customers and we will actively cooperate with our customers to offer effective solutions and cost benefits.
  • Quality 6a 7a 8a gold fire assay cupel Manufacturer | XTL
    Quality 6a 7a 8a gold fire assay cupel Manufacturer | XTL
    Cupels are magnesia or bone ash cup shaped containers used in assaying to separate precious metals from base elements such as lead. They operate as a "differential filter" and are porous to metal oxides, but not metals. Used in an oxidizing atmosphere, base metals are oxidized and are absorbed into the cupel. Since precious metals do not oxidize, they are not absorbed and are left on top of the cupel for weighing or further analysis.
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