I am looking for information on frozen grapes and freezing technology.
Fruits should be frozen as quickly as possible to avoid loss of nutrients; precooling is not needsd, you can go directly to freezing
Grapes need to be rinsed in water
all impurities , leaf rests, decayed fruit...removed.
fruit is more valuable in the market if frozen separately (IQF = Individual Quick Frozen)
This is achieved in freezing tunnels that pump air continuously to avoid fruit from sticking to each other.