Parameters affecting pre-cooling, freezing, storage and transport of red raspberry fruits, individually frozen in discontinuous tunnels. Comparison among five varieties of Rubus sp.

Red raspberry is a fruit of very low mechanical resistance even in the frozen state. Due to this a series of problems in harvesting, pre-cooling, freezing, frozen storage and refrigerated transport take place. Previously developed methodology is applied in this work according to the above-mentioned characteristic for five varieties of red raspberry fruit. Practical parameters, such as pre-cooling times, weight loss, individually frozen fruit%, critical temperatures of storage and refrigerated transport, etc., are recommended for their handling and for improving the individually frozen fruit yields, so that the final quality of the product is not affected by non appropriate handling.