The moisture content is the main parameter of food products which influences the storage time. It is
known that the shelf life of products with high moisture content is shorter than of products with lower
moisture content. The initial moisture content of fresh cranberries is shown in Table 1; the significant
differences in moisture content of cranberries depending on variety were not found. For shelf life
extension cranberries were dried up to the moisture content of 9.0±0.1%. As a result, providing of
3.000±0.001 kg load of berries in vacuum-microwave drying cylinder, the drying time was 82±2 min.
Therefore current experiments demonstrate the pre-treatment methods don’t significantly influence drying
rate in vacuum-microwave drier. However, the pre-treatment of berries significantly influences moisture
diffusivity from berries during convective drying. In the experiment it was established, that the drying
time for halved berries was 36±1 h, for steam-blanched it was 38±1 h and for perforated it was
significantly longer – about 74±1 h. Moisture content during the drying process of cranberries decrease
on average from 86.94% up to 9.00%