Catalog Number Composition Lead Absorbency (g) Dia (in.) No./Case Weight/Case (lbs)
090G-124 Bone Ash 30 1.5 100 30
090G-126 Bone Ash 50 1.75 100 40
090G-128 Bone Ash 85 2 100 30
090G-130 Bone Ash 170 2.5 100 30
090G-144 Premium Composite 30 1.5 300 40
090G-146 Premium Composite 50 1.75 216 30
090G-155 Magnesite MGO 35 1.5 100 30
090G-156 Magnesite MGO 50 1.75 216 30
090G-157 Magnesite MGO 85 2 160 30
SKU: 090G- Category: Tag:
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In Fire Assay, cupels are used in the assaying process to absorb lead from an assay button, and must provide good lead absorption as well as durability. Sepor provides cupels that are available in Bone Ash, Premium Bone Ash and Magnesite.

Both the Bone Ash and Premium Bone Ash cupels are made from dried animal bones, with the Premium Cupel having Portland cement added, which provides additional strength. Both exhibit excellent lead absorption characteristics.

Magnesite cupels are more robust than their Bone Ash counterparts. They are not affected by temperature changes and are free from cracking and pitting. Magnesite cupels have a rapid rate of lead absorption, and the resulting dore beads are easily removed, minimizing losses.


Choose Model

090G-124 • Premium Bone Ash, 090G-126 • Premium Bone Ash, 090G-128 • Premium Bone Ash, 090G-130 • Premium Bone Ash, 090G-144 • Bone Ash, 090G-146 • Bone Ash, 090G-155 • Magnesite MGO, 090G-156 • Magnesite MGO, 090G-157 • Magnesite MGO


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