The diagram illustrates how black tea is produced by 2 distinct techniques.
Overall. it is clear that the linear diagram includes 5 different stages, commencing with collecting the leaves, followed by physical and chemical treatments and ending with drying. Another key feature is that a set of equipment optionally used to produce the black tea
The process of making black tea precedes with harvesting fresh tea leaves, involved in picking only bud and two top leaves to ensure the great quality of tea. Following this, the collected leaves are placed on racks for the air to go through, eliminating 60% moisture. The next phase is rolling and cutting, which involves traditional and modern methods. In terms of conventional technique, the withered leaves are rolled into broken and flat forms, resulting in releasing enzymes. Regarding modern technique, the leaves are cut, torn and curled to create granular pieces.
After some physical treatments, the leaves are rolled before placed on cement or tiles, for the reaction of enzymes and the air, transforming the leaves’ color into copper. In the final stage, the leaves are subjected to frying or drying, when they are placed in ovens or dryers to wipe 97% moisture out and release flavour and aroma.