One client wants to verify the performance of Vikumer freeze dried fruit machines, and check the dried product quality, before they invest freeze drying technology, and expand their product range to freeze dried. So, we make a test with strawberries, since their main business is strawberries sell.
In the test, we freeze dry strawberries entirely, quarter, cubes and sliced to pieces. Here are the results.
Fresh and Freeze Dried Strawberries Compare
Whole strawberries before and after freeze dry
Half-half strawberries before and after freeze dry
Sliced strawberries before and after freeze dry
Cubed strawberries before and after freeze dry
Freeze dry entire strawberries need short batch duration, Freeze dry strawberry slices and cubes need 5~6hrs longer.
Freeze drying cycle for strawberry is 25hrs around.
The freeze dry machine we use is Vikumer BFD-10, a lab scale freeze dryer, stainless steel shelves and trays.
If use aluminum alloy shelves and trays machine, the drying time can reduce 2~3hrs.
Our loading volume is 1.5X than standard/suggested, with standard loading, the drying time also can reduce.