The diagram shows how tea leaves are processed into five tea types

The diagram presents the manufacture of five different types of tea. It is immediately apparent that although all the teas are produced from the same leaf, the differences in the manufacturing process result in five different types of tea.

The first three stages of manufacture are the same for all of the five teas. The leaves are grown, they are then plucked, and following this withering of the leaves occures. The final stage is also the same, which sees all the leaves dried in an oven. However, in the stages in between this, differing methods of production are employed.

To begin, white tea is unique as it involves no other processing. In contrast, green, oolong and large leaf black tea are all rolled as part of the process. However, while green tea is steamed before being rolled but is not fermented, the other two teas are first rolled and then both fermented (oolong only slightly but large leaf black completely). Finally, small leaf black tea is neither steamed nor rolled, but is crushed before being fully fermented.