Evaporation of surface water
The surface moisture is driven off with the correct drying conditions
Leaving the permeable surface open for included moisture to migrate through
Migration of inclusion water
This water is much more difficult to remove, require 2 conditions
A retention time in the drying unit to encourage it to move to the surface
150% more than the retention time needed for the surface
An air temperature lower than the crystal temperature to prevent sealing of the crystal surface
Evaporation of the migrated inclusion water
Once the inclusion water has reach the surface of the crystal, the condition for its removal are the same as for the surface water