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.
Orange juice
During World War II, American soldiers rejected vitamin C-packed lemon crystals because of their unappetizing taste. Thus the government searched for a food that would fulfill the nutritional needs of the soldiers, have a desirable taste, and prevent diseases such as scurvy in a transportable vitamin C product. The federal government, the Florida department of Citrus, along with a group of scientists desired to develop a superior product to canned orange juice (which was the current orange juice on the market in the 1940s) and developed frozen concentrated orange juice. Unfortunately frozen concentrated orange juice was developed three years after the war had ended.