Cold-pressed juice
Making cold-pressed juice is a two-step process. The first stage is to shred the fruits and vegetables into a pulp. Typically the shredding process uses a steel rotating disc. Produce is loaded into a large hopper feeding tube and typically falls into a filter bag. The second process is the hydraulic press; this exposes the shredded produce to extreme pressures between two plates. The pressure causes the juice and water content from the produce to drip into a collection tray below, leaving behind the fibre content in the filter bag. The fibre left behind is generally composted, recycled in food products or discarded.
Hemp juice
The preferred procedure is to freeze the freshly cold-pressed juice instantly for preservation. The quality of the juice depends on immediate freezing. The frozen juice can be freeze-dried into a storable powder. Freezing and freeze-drying stabilize the natural form of the cannabinoids as cannabinoid-acids. Another procedure is pasteurization. The ultra-heat-treatment will "activate" the cannabinoids by separating the acid part from the natural cannabinoids. Increasing shelf life of hemp juice can also be achieved by fermentation, using various procedures, preferably by adding yeast/yeast extract and sugar. Using salt is a proven procedure to achieve storability in foods. With regard to hemp juice this can be done by mixing salt with fresh hemp juice, which leads to an easily usable product: "hemp salt".