The most commonly consumed tea in the world, Black Tea is created when tea leaves are exposed to hot air for several hours after being plucked. This process helps reduce the water content of the tea by 50% to 60%. The leaves are then rolled, either by hand or mechanically, to allow essential oils to spread and impregnate the buds. The leaves are then passed through a screen and the smallest leaves go on to the next stage whereas the bigger leaves are rolled again. These are then dried in an oven to stop the oxidation process. The end result is a full-bodied tea, treasured by tea lovers across the world.