Great mechanical strength, and are not affected by atmospheric conditions (not hygroscopic). .
The prill or bead does not adhere to the fire assay cupel surface,
When using MABOR magnesia cupels, the assay have a reduced tendency to freeze.
No cracking or spiting, and the beads do not attach to the fire assay cupel surface.
MABOR magnesia cupels provide security and quickly absorb great amounts of litharge without cracking or pitting.
Our magnesia cupels allow to reduce the Cupellation temperature and time, resulting in minimal losses, higher accuracy and better yields.
Perfect uniformity of Quality of MABOR magnesia cupels
Quality and performance are continuously improved
MABOR magnesia cupels swiftly absorb 70% of their weight in litharge (PbO) at 980ºC wihtout leaking.

Finally, we also supply the whole range of tools to handle the magnesia cupels and blocks, and the consumables to cupellate:
Cupel trays
Tongs and tools to hanfle the cupels or blocks
Multiloaders to load the assay on the cupels or blocks
Assay grade lead foil and tablets, copper inquarts and silver inquarts
Accessories for parting and annealing, including quartz baskets

MABOR BULION BLOCKS
The absorption capacity of the magnesia bullion is about 8g of litharge (PbO) per hole. The magnesia bullion blocks are particularly useful when the samples have similar gold contents because they allow to:

Fully exploit Fire Assay‘s parallel processing capabilities
Fully scale to mass analysis production stage
Use the Same block for Samples, duplicates, standards & blanks
High accuracy – samples undergo equal ambient conditions
Save time – reduce manipulation hazards
Better stability thanks to their larger base
Reduce misplacing errors as assays keep the original array
Ideal for mass analysis of same carat alloy samples
Handling several bevelled blocks at once
Usually, it is possible to combine the use of bullion blocks with parting and annealing baskets. If possible, the assayer will save greats amounts of time and nitric acid.