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Darjeeling Tea Processing
(Tea Manufacture) |
PLUCKING:
During quality periods i.e. first flush or second flush, two leaves
and a bud are picked - this is called fine plucking, resulting
in high quality teas. At other times, even three or four leaves
and a bud are plucked - this is called coarse plucking. The plucking
cycle is maintained at about 7 day intervals. The plucked leaves
are collected in bamboo baskets, taking care that they are not
crushed by overloading the baskets. WEIGHMENT : The plucked leaves
are delivered to the factory for weighment. Each plucker is paid
against the quantity (weight) of green leaf that he/she brings
in.
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WEIGHMENT :
The plucked leaves are delivered to the factory for weighment.
Each plucker is paid against the quantity (weight) of green leaf
that he/she brings in.
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WITHERING:
The green leaf, after eradication of any foreign matter, is spread
on "withering troughs", loosely, to a depth of 6 inches. Fans
are installed to pass air over the green leaf while it withers.
The object of the withering process is to get rid of the moisture
content in the green leaf and prepare the leaf to withstand the
strain of rolling without breaking up. Period of withering can
vary from 18 to 24 hrs. depending on the moisture content. The
leaf, when properly withered, gives off a fragrant odour.
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ROLLING:
The object of rolling is to bruise the cells of the leaves so
that their sap (juice) is exposed to the action of oxygen in the
air. Rolling also gives a twist to the leaf. The cell sap contains
tannins, caffeine, proteins and other chemical substances, which
ultimately give the characteristic colour to the tea liquor during
infusion. The withered leaf is given 3 or 4 rolls (each of 30
minutes). After the first roll, the leaf is sifted (kutcha sifting)
and the fine leaves (about 20%) are taken out. The rest are given
a second roll and in the second kutcha sifting about 20 - 25%
rolled leaf is taken out. This process is repeated on the remainder
with a 3rd or 4th roll. The first roll is done at low pressure,
second at medium and 3rd at harder pressure.
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FERMENTATION:
The rolled leaves are spread on fermenting beds and left to ferment
for a period of 3 to 4 hrs. The leaves are loosely spread to a
thickness of 1 or 1.5. inches. Good fermentation results in the
colour of the leaf to change to reddish brown giving off the characteristic
aroma after the juices in the rolled leaves react with each other
and the air.
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FIRING:
The fermented leaves are then fired (i.e. heated) in a drier machine.
The object of this process is to arrest fermentation and slowly
dessicate the leaf in such a way so as to extract the moisture
without scorching the tea and at the same time, preserving its
quality and other characters to the optimum level. The leaves
are passed through the driers and remain within the driers for
a period of approx. 20 mins, at a temperature of around 240 to
250° F. This results in the leaves moisture content to come down
to 20 - 25% from 60 - 70% before it enters the drier. A second
firing is also given shortly thereafter.
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SORTING:
Sorting of different grades is done by sorting machines which
are fitted with wire mesh trays that revolve or vibrate. The tea
is passed over wire mesh of varying sizes so that the whole leaf,
broken leaf, fannings and dust grades fall at different places.
These sorted teas comprise the different grades.
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PACKING:
The different grades of tea are then packed into plywood chests
/ paper sacks lined with aluminium foil inside. Each lot is generally
packed in a minimum of 5 chests / sacks or more. The chests /
sacks are sealed and the grade name, garden name, lot number (called
an invoice), chest number, gross and nett weight, year of manufacture
etc. are printed on the chests / sacks with stencils. Lastly,
Darjeeling CTM user licence number and Darjeeling "CTM-applied
for" are also stencilled onto the tea chests / sacks.
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