Dark tea processing steps are : watering, fixing, rolling, fermentation, rolling and drying.
Each day process 100kg fresh tea leaves, the water content is 75% - 80% (take an intermediate value of 78%).
Because of the materials of drak tea leaves is relatively old, the tea leaves are relatively hard, need add water to soften, water is about 10% of the total weight of tea, about 10kg, let tea water content increase to 80%, now the weight abouy 110kg.
Dark tea fixing process time about 4 minutes, each hour can process 15 times, each time can process 7.5kg, we recomend you use 1 set DL-6CST-90 tea fixing machine, this machine can put 10kg tea leaves per time.
After fixing, the water content reduce 20%, drop to about 75%, the total weight about tea leaves is 88kg.
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This tea fixing machine use gas as fiel, fixing time about 4 minutes, fixing temperature 280℃ - 320℃, each time put 7.5kg tea leaves.
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1 SET DL-6CST-90
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Dark tea rolling time about 15 minutes, rolling speed about 37 rpm, each hour can roll 4 times, each time can process 22kg, we recomend you use 1 set DL-6CRT-55 tea rolling machine, this machine can put 25kg tea leaves per time.
After rolling, the water content is not changed, the total weight about 88kg.
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Rolling barrel diameter is 55cm, rolling time about 15 minutes, light press 15 minutes, each time put 22kg tea leaves, rolling speed about 37 rpm.
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1 SET DL-6CRT-55
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Dark tea fermentation time need about 16-18 hours, the temperature is kept at 30℃ - 40℃, processing 88kg tea leaves, we recomend you use 1 set DL-6CFJ-30 tea fermentation machine, this machine can put 100kg tea leaves per time.
After fermentation, the weight is not changed, total weight about 90kg.
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Fermentation volume about 0.36m³, each time put 88kg tea leaves, dark tea fermentation about 16-18 hours, keep temperature 30℃ - 40℃.
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1 SET DL-6CFJ-30
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Dark tea need repeat rolling, this time, rolling need about 8 minutes, each hour can process 7 times, each time need process 13kg tea leaves, this time, we suggest you use small kind tea rolling machine, the effect will be better, so we recomend you use 2 sets DL-6CRT-35 tea kneading machine, this machine can put 6.5kg tea leaves per time.
After rollingm the weight of tea leaves is not changed, about 90kg.
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Repeat rolling need small tea rolling machine, rolling barrel is 35cm, time about 8 minutes, the press is less than step 3, each time put 6.5kg tea leaves.
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1 SET DL-6CRT-35
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Dark tea drying temperature about 75℃ - 100℃, drying time about 2-3 hours, we recomend you use 1 set DL-6CHZ-9 tea drying machine, this machine can put 110kg tea leaves per time.
After drying, the water content of dark tea leaves is drop to 5%, the total weight about 25kg.
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This machine drying area is 9m², can put 110kg tea leaves per time, dark tea drying need about 2-3 hours, temperature about 75℃ - 100℃, until the water content drop to 5%.
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1 SET DL-6CHZ-9
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