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.
Maceration (wine)
The process of cold maceration or cold soak is where temperatures of the fermenting must are kept low to encourage extraction by water and added sulfur dioxide rather than relying principally on heat and alcohol to act as a solvent. This technique was popular in the production of Burgundy wines in the 1970s and 1980s but there is still some debate among oenologists about the overall benefits to and resulting quality of the wine.