In order to ensure the product temperature in distribution, prechilling to temperatures 1 to 2 o C below initial freezing is used. This will give the product a refrigeration reservoir during distribution. Based on the production volume today, this means that 70 trucks filled with ice are being transported out of Norway each week. The unit cost for this transportation is the same as for the Salmon.
Most fresh food contains a large amount of water.
Instead of adding ice for temperature control, a small amount of the internal water is frozen. The figure illustrates the differences between the common practice and the ColdStep alternative on a weight basis. Both alternatives will have the same stored refrigeration capacity in the box. Product temperature on arrival will depend on the insulation provided by the chosen packaging and the ambient temperatures during transport from packaging until arrival at the final destination.