Black tea Processing

In processing black tea, there are 2 kind/type process, which is CTC and Orthodox.
There are 6 ways of processing black tea. Which in each part have difference between CTC and Orthodox process:

1.Wilting
Wilting is effort to alter the condition of tea leaf sprout physical from fresh situation become weak or wilt step by step by evaporating some of water on tea leaf sprout. Rate reduction water at tea leaf sprout result condensed dilution so that at kibbling process of cell dilution do not drop but Iump at surface of the leaf.

Tea leaves placed in some big box called withering through, and then fanning by fresh air and hot air to quickening wilt process by improving vicinity air temperature so that tea sprout become quickly wilting. For the Orthodox water rate wanted is 52 - 58%, while CTC water rate wanted is 68-76%.

2.Hulling and wet sortation
Hulling will cut leaf sprout so that will be obtained by leaf powder which later will become black tea. While wet sortation, is to dissociate particle leaf size measure which have been milled according to its size measure because in hulling, do not all leaf milled uniformly.
The difference between CTC and Orthodox is the equipment to process.
Orthodox
Hulling process of Orthodox started with tea leaf sprout which have experienced of wilt process first time step into hulling in OTR ( Open Top Roller). Result mill from OTR;then sieved in DIBN I ( Double Indian Bulkbreaker Nutsortier). Result of sieve yield I powder and the leaf that do not get away sieve enter in PCR ( Press Cup Roller). Result mill from PCR sieved in DIBN II and obtained II powder, the leaf that do not get away sieve enter in Rotorvane. Result mill Rotorvane sieved in DIBN III yield III powder and the leaf that not get away sieve enter in Rotorvane II. Result mill from Rotorvane II sieved in DIBN I, obtained IV powder and badag. Powder I, II, III, IV And badag
then have an ferment process.

CTC
While CTC process started with leaf sprout which have wilt enter in GLS (Green Leaf Shifter) to have wet sortation Rich is dissociate of wilt leaf sprout from physical contamination.Then from GLS, leaf sprout enter in BLC (Bourbora Leaf Conditioner) and then enter in CTC machine. Hulling Process of CTC is Continue process.. In this CTC there are two CTC band. first band, from GLS ;then go to Rotorvane yielding harsh tea powder and green chromatic.;Then harsh tea powder enter CTC and yield smooth tea powder which is green chromatic chocolate. While at band two, tea leaf after passing GLS later;then [go] to BLC later;then enter CTC and yield smooth tea powder which is green chromatic chocolate.

3.Enzymatic Oxidation
Enzymatic oxidation aim is to give opportunity to polyphenol oxidase enzyme to be earning catalyze reaction of polyphenol compound oxidation in tea sprout.
Orthodox
Enzymatic oxidation at Orthodox process conducted by putting down tea powder at the trays at trolley and let certain during several time to be natural tea powder of enzymatic oxidation. This process between 140-200 minutes.

CTC
At CTC process, enzymatic oxidation by equipment called CFU (Continuous Fermenting Unit). This process between 60-120 minutes.



4.Draining
Target of draining process is to discontinue process of enzymatic oxidation of poliphenol in tea at the time of supporter composition o quality of black tea reach optimal situation, taking care of the nature of is specific of tea at the time of tired tea of optimum quality, degrading rate irrigate reach 2,5-3,5% so that black tea have energy keep old ones as well as killing undesirable microbial.
Orthodox
In orthodox process use FBD (Fluid Bed Dryer) at 15-25 minutes,
CTC
iN CTC process use VFBD (Vibro Fluid Bed Dryer) at 12-18 minutes.

5.Dry Sortation
Dry Sortasi represent work dissociate tea particle pursuant to form, colour, particle size measure, specific gravity and fibre content / bone, so that obtained uniform tea particle as according to standard wanted by consumer / market.
Orthodox
Orthodox process use Midleton, Vibrex, Chauta Shifter, Java Sortir, Teawan
CTC
CTC process Use Tea bin, vibro mesh, Chauta Shifter,Java Sortir, Winower

6.Packing
This is the final process of black tea.
intention of packing is to protect dry tea from physical damage ( increase of water rate, insect contamination ), facilitating transportation, depository and marketing, improve;repairing external appearance from dry tea, as well as minimization space in is depository.