The used device is a sorter to jolts of the kind Steinecker constituted of four superimposed sifters:
- 2.8 mm
- 2.5 mm
- 2.2 mm
- < 2.2 mm = orgettes
- bottom: dusts
- garbage = orgettes + dusts
The calibration takes place on 100 grs. of malt.
A good malt has a calibration of fraction of 2.5 + 2.8 between 90 and 95%,
garbage orgettes + dusts < to 2.