Practical experience with an updated mortar grinder have shown that it is demonstrably more efficient than the model it replaces
Fritsch's Pulverisette 2 mortar grinder has recently been updated.
The company says its aim was to improve both handling and the reproducibility of milling trials, so that now - at a constant RPM from 70 (at 50Hz) - the precisely variable and observable g-force provided by springs and lateral pestle pressure in Nm (kg) can be maintained for each grinding process.
Comparisons with the previous model have shown that the new Pulverisette 2 is demonstrably more efficient, it says.
Of course, this is hardly noticeable in very short grinding times of less than Ten minutes, but in grinding times of 30 minutes using quartz sand Fritsch reports a 7% higher proportion under 20mm.
A further example, this time with wet grinding, showed that the use of too much water slightly increases the pressure in the milling gap opening upwards between the pestle and the bowl, allowing the unground particles to pass through.
