In cryoextraction, this is done to grapes to produce the most concentrated juice in pressing
The selection of the most sugar-rich and thus ripest grapes by cryoextraction is... [DOC] [TLE] California Icewine - WineMaker Magazine [PAR] It takes more grapes to make a given volume of icewine than standard wines, and 
the ... that do not have the climatic conditions to produce icewine, grapes or juice 
may ...