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All tea comes from the
"Camellia sinensis" plant, however, where the tea is
grown, the climate, soil conditions, altitude, etc, and
how the tea is processed, determines the flavor
characteristics of the tea. Based on the method of
production, tea can be divided into three categories -
black, oolong, and green.
Black tea is withered, fully oxidized (fermented) and dried.
Black teas are available from various estates, countries and
regions, with added flavorings and also as specialty blends.
The two main types of manufacture for black teas are Othodox (rolled
whole leaf) and CTC-Cut Torn and Curled (appears like little ball
bearings). The Orthodox method produces the traditional looking tea
leaf - long and wiry whole leaf types. This is achieved as follows -
the withered leaf is fed into what appears to be a very large mixing
bowl with a large paddle that mashes the tea. During the process the
tea is torn apart to a certain degree and also crushed. To achieve
'clean' tea, several series of stalk exrtactors are used. Othodox
teas tend to be lighter and less full bodied as compared to CTC
manufactured teas.
The CTC manufacturing process turns the tea into what appears to be
small balls of tea. The withered tea leaf passes between two large
rollers that are revolving opposite to one another. On each roller
are a multitude of sharp blades set at an angle that mesh with the
opposing roller. As the tea passes through this series of blades the
tea is cut and torn apart and is compressed or curled into little
balls.
CTC is a popular variety of manufacturing since producers realize
higher yields from acreages under tea cultivation. Also CTC teas are
more suitable to tea bagging since they flow more easily to gravity
fed bagging machines. CTC teas tend to be more full bodied and
robust and are well suited to 'gutsy' blends.
Some of the processes involved in tea production are:
Plucking: Top quality tea is hand plucked and the best tea
comes from the new shoots which are the top two leaves and the bud
of this shoot. It takes 4.5 pounds of green leaf to produce one
pound of black tea.
Withering: The leaves are spread out on long trays in warm
temperatures for 12-16 hours so that they loose water (approx 50% of
moisture content).
Rolling: In the withered leaves are first rolled by machine
then often crushed torn and curled (CTC method) to break open the
tea cells.
Fermentation: The tea is left open to the air for one to two
hours. Oxidation occurs affecting both the taste and the color of
the tea.
Drying: After the fermentation stage the leaves are passed
through a drier stopping the oxidization process.
After processing, the tea is sorted and tasted and, if desired, the
tea is blended and/or flavored.
Oolong tea is withered, partially oxidized (fermented), and dried.
Oolong tea is generally wilted in direct sunlight (solar
withering). The leaves are then shaken in tubular bamboo baskets to
bruise the leaf edges, making the edges oxidize faster than the
centre of the leaf. The leaves are shaken and spread out to air-dry
several times until the leaf veins become apparent and the surface
yellows. The edges become reddish from oxidization while the centre
remains green. Fermentation is stopped halfway through by firing.
Green tea is an unfermented tea. After withering (if withered at
all) it is immediately steamed or heated via firing or pan frying to
prevent oxidization, and then rolled and dried.
Green tea may or may not go through a withering process. The
leaves are immediately panfired, steamed or baked to prevent
oxidization, thus no chemical change. The tea leaves are then rolled
and dried.
White tea: A special type of green tea is White Tea. Like
green teas this tea is unfermented. White teas go through the least
amount of processing of all the teas. White teas are withered and
then immediately dried by steaming.
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