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tea brick
Tea bricks () or compressed tea () are blocks of whole or finely ground black tea, green tea, or post-fermented tea leaves that have been packed in molds and pressed into block form. This was the most commonly produced and used form of tea in ancient China prior to the Ming Dynasty. Although tea bricks are less commonly produced in modern times, many post-fermented teas, such as ''pu-erh'', are still commonly found in bricks, discs, and other pressed forms. Tea bricks can be made into beverages or eaten as food, and were also used in the past as a form of currency.
== Production ==
In ancient China, compressed teas were usually made with thoroughly dried and ground tea leaves that were pressed into various bricks or other shapes, although partially dried and whole leaves were also used. Some tea bricks were also mixed with binding agents such as flour, blood, or manure to better preserve their form so they could withstand physical use as currency. Newly formed tea bricks were then left to cure, dry, and age prior to being sold or traded. Tea bricks were preferred in trade prior to the 19th century in Asia since they were more compact than loose leaf tea and were also less susceptible to physical damage incurred through transportation over land by caravans on the Ancient tea route.
Tea bricks are still currently manufactured for drinking, as in ''pu-erh'' teas, as well as for souvenirs and novelty items, though most compressed teas produced in modern times are usually made from whole leaves. The compressed tea can take various traditional forms, many of them still being produced. A dome-shaped nugget of 100g (standard size) is simply called ''tuóchá'' (沱茶), which is translated several ways, sometimes as "bird's nest tea" or "bowl tea." A small dome-shaped nugget with a dimple underneath just enough to make one pot or cup of tea is called a ''xiǎo tuóchá'' (小沱茶; the first word meaning "small") which usually weighs 3g–5g. A larger piece around 375g, which may be a disc with a dimple, is called ''bǐngchá'' (饼茶, literally "biscuit tea" or "cake tea"). A large, flat, square brick is called ''fāngchá'' (方茶, literally "square tea").
To produce a tea brick, ground or whole tea is first steamed, then placed into one of a number of types of press and compressed into a solid form. Such presses may leave an intended imprint on the tea, such as an artistic design or simply the pattern of the cloth with which the tea was pressed. Many powdered tea bricks are moistened with rice water in pressing to assure that the tea powder sticks together. The pressed blocks of tea are then left to dry in storage until a suitable degree of moisture has evaporated.
Ya'an is the main market for a special kind of tea which is grown in this part of the country and exported in very large quantities to Tibet via Kangting and over the caravan routes through Batang (Paan) and Teko. Although the Chinese regard it as an inferior product, it is greatly esteemed by the Tibetans for its powerful flavor, which harmonizes particularly well with that of the rancid yak's butter which they mix with their tea. Brick tea comprises not only what we call tea leaves, but also the coarser leaves and some of the twigs of the shrub, as well as the leaves and fruit of other plants and trees (the alder, for instance). This amalgam is steamed, weighed, and compressed into hard bricks, which are packed up in coarse matting in subunits of four. These rectangular parcels weigh between twenty-two and twenty-six pounds—the quality of the tea makes a slight difference to the weight—and are carried to Kangting by coolies. A long string of them, moving slowly under their monstrous burdens of tea, was a familiar sight along the road I followed.〔Migot, André (1955). ''Tibetan Marches''. Translated by Peter Fleming. E. P. Dutton & Co., Inc., U.S.A., pp. 59-60.〕
The brick tea is packaged (Kangting ) either in the courtyard or in the street outside, and it is quite a complicated process. When the coolies bring it in from Ya'an, it has to be repacked before being consigned upcountry, for in a coolie's load the standard subunit is four bricks lashed together, and these would be the wrong shape for animal transport. So they are first cut in two, then put together in lots of three, leaving what they call a ''gam'', which is half a yak's load. Tea which is going to be consumed reasonably soon is done up in a loose case of matting, but the ''gams'', which are bound for remote destinations, perhaps even for ''Lhasa'', are sewn up in yakhides. These hides are not tanned but are merely dried in the sun; when used for packing they are soaked in water to make them pliable and then sewn very tightly around the load, and when they dry out again the tea is enclosed in a container which is as hard as wood and is completely unaffected by rain, hard knocks, or immersion in streams. The Tibetan packers are a special guild of craftsmen, readily identifiable by the powerful aroma of untanned leather which they exude.
Another prominent guild in Kangting is that of the women tea coolies who shift the stuff from the warehouses to the inns where the caravans start. They have a monopoly on this work and the cheerful gangs of girls are a picturesque element in the city's life. They need to be immensely strong to do a job which consists of carrying over a short distance anything up to an entire yak's load several times a day. Many of them are quite pretty (and well aware of the fact); they look very gay and rather brazen as, giggling and chattering among themselves, they move along with their heavy burdens, which are held in place by a woolen girdle around the chest.〔Migot, André (1955). ''Tibetan Marches''. Translated by Peter Fleming. E. P. Dutton & Co., Inc., U.S.A., pp. 83-84.〕
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