Assay Litharge, gold free, immediate supplyApril 1, 2019
Quartz Parting & annealing baskets for 12 samples – QBR-12April 3, 2019
Quartz Parting & annealing baskets for 9 samples – QBR-9
Quartz parting & annealing baskets for 6 samples, that allow to carry out the successive parting and gold annealing operations in the same container, and subsitute, both parting flasks, and gold annealing crucibles.
These quartz parting & annealing baskets for 6 samples are capable of withstanding:
- Attack of concentrated nitric acid
- High temperature necessary for annealing (up to 1000ºC)
- Thermal shock due to very low coefficient of thermal expansion.
They are therefore suitable for simultaneously processing the two nitric acid attacks (the first with nitric acid 33%, the second with nitric acid 49%) and then go directly in the gold annealing furnace (after rincing with water).
The quartz thimbles are provided with thin slits to evacuate the nitric acid / distilled water and possess a flange at the top to fit the holes of the basket.
It is possible to supply them as spares in case of breakage. There are two types of quarz thimbles / crucibles and they suit most cornet sizes.
The following parting & annealing baskets configurations are available:
|Dimensions (L x W x H)|
|QBR-9||57x57x70||9 (3 x 3)|
|QBR-16||72x72x70||16 (4 x 4)|
|QBR-25||87x87x70||25 (5 x 5)|
|QBR-36||102x102x70||36 (6 x 6)|
|QBR-49||117x117x70||49 (7 x 7)|