火试金氧化镁灰皿又称镁砂灰皿，火试金氧化镁灰皿是火试金常用灰皿。

Fire Assay 2X Cupels

MAGNESIA CUPELS & MAGNESIA BULLION BLOCKS

High quality magnesite is the majoritary component of MABOR  magnesia cupels. 

MABOR magnesia cupels have a superior quality and offer many advantages:

•  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.

• 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 MAGNESIA CUPELS (MgO Cupels)

  Magnesia Cupels 1, 2X, 3, 4, 5 and 6 application is to analyse gold and silver alloys. In this case, it is first necessary to wrap the sample and silver inquarts with assay lead foil or with assay lead tablets. Cupels 1 and 2X are specially suitable for silver analysis and microcupellation. On the other hand, Cupels 3, 4, 5 and 6 are for the analysis of bullion, white gold, and yellow alloys.

  Sigma Magnesia Cupels ranging from #7A to #12 use is to analyse ores,  ashes,  sweeps, scraps, concentrates or electrolytic slimes.

  Finally, magnesia cupels 14, 15 and PC are production cupels.  They are particularly useful, if the user does not wish to invest in a gold refinery but needs to accasionally produce gold & silver.