Compressed tea, calledtea bricks,tea cakes ortea lumps, andtea nuggets according to the shape and size, are blocks of whole or finely groundblack tea,green tea, orpost-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 ancientChina prior to theMing Dynasty. Although tea bricks are less commonly produced in modern times, many post-fermented teas, such aspu-erh, are still commonly found in bricks, discs, and other pressed forms. Tea bricks can be made into beverages like tea or eaten as food, and were also used in the past as a form of currency.
Tea brick, on display at Old Fort EriePorters laden with "brick tea" in a 1908 photo byErnest Henry "Chinese" Wilson, an explorer botanist
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 asflour,blood, ormanure to better preserve their form so they could withstand physical use as currency.[1] Newly formed tea bricks were then left to cure, dry, and age prior to being sold or traded. Tea bricks were preferred in Asian trade prior to the 19th century, since they were more compact and less susceptible to physical damage than loose leaf tea. This was important during transportation over land bycaravans on theTea Horse Road.
Tea bricks are still currently manufactured for drinking, as inpu-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 100 g (standard size) is simply calledtuóchá (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 axiǎo tuóchá (小沱茶; the first word meaning 'small') which usually weighs 3 g–5 g. A larger piece around 357 g, which may be a disc with a dimple, is calledbǐngchá (饼茶, literally 'biscuit tea' or 'cake tea'). A large, flat, square brick is calledfāngchá (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.
Although the Chinese regard it as an inferior product, [tea bricks are] greatly esteemed by the Tibetans for [their] powerful flavor, which harmonizes particularly well with that of the rancidyak'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.[2]
The brick tea is packaged [inKangting] 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 agam, 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 thegams, which are bound for remote destinations, perhaps even forLhasa, are sewn up in yakhides.[3]
A brick ofHubeimǐ zhūan chá (米磚茶), made of powderedblack tea
Due to their density and toughness tea bricks were consumed after they were broken into small pieces and boiled. Traditionally, in the Tang Dynasty, they were consumed being ground to a fine powder. The legacy of using tea bricks in powdered form can be seen in modernJapanese matcha tea powders as well as the pulverized tea leaves used in thelei cha (擂茶) eaten by theHakka people and some people in Hunan province.
In ancient China the use of tea bricks involved three separate steps:
Toasting: A piece was broken from the tea brick and usually first toasted over a fire. This was probably done tosanitize the tea brick and destroy any mold or insect infestation that may have occurred when the bricks were stored uncovered in warehouses and storerooms or in covered jars underground. Toasting also imparted a pleasant flavor to the resulting beverage.
Grinding: The toasted tea brick was broken up and ground to a fine powder.
Whisking: The powdered tea was mixed into hot water and frothed with a whisk before serving. The color and patterns formed by the powdered tea were enjoyed while the mixture was being drunk.
In modern times bricks ofpu-erh type teas are flaked, chipped, or broken and directly steeped after thorough rinsing; the process of toasting, grinding, and whisking to make tea from tea bricks has become uncommon.
Tea bricks are used as a form of food in parts ofCentral Asia andTibet in the past as much as in modern times. In Tibet pieces of tea are broken from tea bricks, and boiled overnight in water, sometimes withsalt. The resulting concentrated tea infusion is then mixed withbutter, cream or milk and a little salt to makebutter tea, a staple of Tibetan cuisine.[1]
The tea mixed withtsampa is called Pah. Individual portions of the mixture are kneaded in a small bowl, formed into balls and eaten. Some cities of theFukui prefecture inJapan have food similar totsampa, where concentrated tea is mixed with grain flour. However, the tea may or may not be made of tea bricks.
In parts ofMongolia and central Asia, a mixture of ground tea bricks, grain flours and boiling water is eaten directly. It has been suggested[by whom?] that tea eaten whole provides neededroughage normally lacking in the diet.
Due to the high value of tea in many parts of Asia, tea bricks were used as a form of currency throughoutChina,Tibet,Mongolia, andCentral Asia. This is quite similar to the use of salt bricks as currency in parts of Africa. Tea bricks were in fact the preferred form of currency over metallic coins for thenomads of Mongolia andSiberia. The tea could not only be used as money and eaten as food in times of hunger but also brewed as allegedly beneficial medicine for treating coughs and colds. UntilWorld War II, tea bricks were still used as a form of edible currency in Siberia.[1]
Tea bricks for Tibet were mainly produced in the area ofYa'an (formerly Yachou-fu) in Sichuan province. The bricks were produced in five different qualities and valued accordingly. The kind of brick which was most commonly used as currency in the late 19th and early 20th century was that of the third quality which the Tibetans calledbrgyad pa ('eighth'), because at one time it was worth eightTibetan tangkas (standard silver coin of Tibet which weighs about 5.4 grams) inLhasa. Bricks of this standard were also exported by Tibet to Bhutan and Ladakh.[11]
All tea plant tissues accumulatefluorine to some extent. Tea bricks that are made from old tea leaves and stems can accumulate large amounts of this element, which can make them unsafe for consumption in large quantities or over prolonged periods. Use of such teas has led tofluorosis, a form of fluoride poisoning that affects the bones and teeth, in areas of high brick tea consumption such as Tibet.[12]
^Wolfgang Bertsch, 2006 The Use of Tea Bricks as Currency among the Tibetans (- Der Gebrauch von Teeziegeln als Zahlungsmittel bei den Tibetern" Der Primitivgeldsammler), Europäische Vereinigung zum Erforschen, Sammeln und Bewahren von ursprünglichen und außergewöhnlichen Geldformen (European Association for the Research, Collection and Preservation of Original and Curious Money), No. 75
^Cao, Jin; Zhao, Yan; Liu, Jianwei; Xirao, Ruoden; Danzeng, Sangbu; Daji, Dawei; Yan, Yu (2003). "Brick tea fluoride as a main source of adult fluorosis".Food and Chemical Toxicology.41 (4):535–42.doi:10.1016/S0278-6915(02)00285-5.PMID12615125.
Bertsch, Wolfgang (2006)The Use of Tea Bricks as Currency among the Tibetans ("Der Gebrauch von Teeziegeln als Zahlungsmittel bei den Tibetern"), Der Primitivgeldsammler. Europäische Vereinigung zum Erforschen, Sammeln und Bewahren von ursprünglichen und außergewöhnlichen Geldformen (European Association for the Research, Collection and Preservation of Original and Curious Money), No. 75, Rüsselsheim. This article was also published in theTibet Journal and is availablewebsite[dead link]
Cao, J.; Zhao, Y.; Liu, J.W. (1998). "Safety evaluation and fluorine concentration of pu'er brick tea and bianxiao brick tea".Food and Chemical Toxicology.36 (12):1061–3.doi:10.1016/S0278-6915(98)00087-8.PMID9862647.
Cao, J.; Zhao, Y.; Liu, J. (1997). "Brick tea consumption as the cause of dental fluorosis among children from Mongol, Kazak and Yugu populations in China".Food and Chemical Toxicology.35 (8):827–33.doi:10.1016/S0278-6915(97)00049-5.PMID9350228.
Yishi, Chen; Fanzhou, Chen (1990). "A Survey of Export of Yunnan Tea for Tibet".Tibet Studies. Journal of the Tibetan Academy of Social Sciences.2 (1):154–67.
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