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সর্ব-শেষ হাল-নাগাদ: ২৩rd নভেম্বর ২০১৫

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In presence, there are almost 30 countries producing 70% black tea, 25% green tea and the remaining 5% consisted of oolong tea. Like black tea, green and oolong tea are widely made in Asian countries to consume as a beverage and has been familiar in China and Japan from centuries.

  • Green tea (i.e.) unfermented tea

Green tea is derived solely and exclusively, and produced by acceptable processes, notably enzyme inactivation and commonly rolling or comminution, followed by drying, from the tender leaves, buds, and shoots of varieties of the species Camellia sinensis (L.) O. Kuntze, known to be suitable for making tea for consumption as a beverage.

Green tea, called non-fermented tea has a more subtle, delicate flavour, and far less caffeine than fermented tea, is medicinally beneficial because the non-fermented leaves retain a higher concentration of natural vitamins and polyphenols than fermented counterparts.

  •  Black tea (i.e.) fully fermented tea

Black tea is a type of tea that is more oxidized than oolong, green and white teas. Black tea is generally stronger in flavor than the less oxidized teas. Two principal varieties of the species are used – the small-leaved Chinese variety plant (C. sinensis subsp.sinensis), used for most other types of teas, and the large-leaved Assamese plant (C. sinensis subsp. assamica), which was traditionally mainly used for black tea, although in recent years some green and white have been produced.

  • Oolong tea (i.e.) partially fermented tea

Oolong is a traditional Chinese tea produced through a unique process including withering the plant under the strong sun and oxidation before curling and twisting. Oolong tea is a semi-fermented tea especially good for digestion, is advised to take after a large meal. The chemical compositions counted in semi-fermented oolong tea are in the ranges of non-fermented green tea to fully fermented black tea. Most oolong teas, especially those of fine quality, involve unique tea plant cultivars that are exclusively used for particular varieties. Oolong is especially popular with tea connoisseurs of south China and Chinese expatriates in Southeast Asia.

  •  Instant tea (i.e.) water soluble tea

In recent times, "instant teas" are becoming popular, similar to freeze-dried instant coffee. Similar products also exist for instant iced tea, due to the convenience of not requiring boiling water. Instant tea was developed in the 1930s, but not commercialised until later. Nestlé introduced the first instant tea in 1946, while Redi-Tea introduced the first instant iced tea in 1953. These products often come with added flavours, such aschai, vanilla, honey or fruit, and may also contain powdered milk. Tea connoisseurs tend to criticise these products for sacrificing the delicacies of tea flavour in exchange for convenience.

  • White tea

White tea is a lightly oxidized tea grown and harvested primarily in China, mostly in the Fujian and Zhejiang province. More recently it is grown in Taiwan, India, Northern Thailand and Eastern Nepal. White tea comes from the buds and leaves of the Chinese Camellia sinensis plant. The leaves and buds are allowed to wither in natural sunlight before they are lightly processed to prevent oxidation or further tea processing. The name "white tea" derives from the fine silvery-white hairs on the unopened buds of the tea plant, which gives the plant a whitish appearance. The beverage itself is not white or colourless but pale yellow.


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