II.2.1.12.2 Partial evaporation

Definition:

 

Prescriptions to concentrate musts at a moderate temperature by evaporation of a portion of the water in the thermal exchanger under a high vacuum.

 

Objective:

 

See the sheet on II.2.1.12 “Partial dehydration of musts”.

 

Prescriptions:

a)        Select a continuous, rather than a re-circulating, unit;

b)       The prescription concentrates all ingredients and should thus be limited to must justifying this technique and should not modify the type of wine produced;

c)        This prescription is not recommended for musts from grape varieties with significant free varieties of odour;

d)       A volume counter will measure the amount of water eliminated.

 

Recommendation of OIV:

Admitted