Cupellation is the last and most important step in the fire assay process and as such, the quality of cupel is extremely crucial. Kilnsware aims to manufacture a full range of fire assay cupels in premium quality and competitive costs.
Our magnesia cupels are manufactured with high-quality material and unique formulation and blend of Magnesium Oxide and special fluxing ingredients. So our cupels have robust mechanical strength and perfect uniformity of quality and will not be affected by atmospheric changes.
During the fire assay cupellation process, our magnesia cupels do not cause spitting of lead and provide rapid absorption of large quantities of litharge. And so the beads in cupels after cupellation are very easily removable.