email

Ripe Tea Pile-Fermentation Method

Home > Tea Production KnowledgeRipe Tea Pile-Fermentation Method

Hot Products

news

Premium Electric Matcha Stone Mill Grinder DL-6CYMJ-50: Wood Grain Base & 0-38 RPM

Premium Electric Matcha Stone Mill Grinder DL-6CYMJ-50: Wood Grain Base & 0-38 RPM

2026-04-30 17:17:25

Discover the upgraded DL-6CYMJ-50 matcha stone mill grinder featuring a premium wood grain base, adjustable 0-38 RPM, and smart electric lifting. Achieve ultra-fine 800# matcha effortlessly with zero waste.

Deli Agricultural Machinery Wows Attendees with New Matcha Stone Mill Innovations at 2026 Xiamen International Tea Packaging Design Exhibition

Deli Agricultural Machinery Wows Attendees with New Matcha Stone Mill Innovations at 2026 Xiamen International Tea Packaging Design Exhibition

2026-04-19 13:24:17

Quanzhou Deli Agricultural Machinery showcases its new matcha stone mill series (Black Gold, Bluestone, and ball mill models) at the 2026 Xiamen Tea Expo, earning high praise from global tea industry professionals.

How to Troubleshoot Uneven Moisture Content During Tea Drying

How to Troubleshoot Uneven Moisture Content During Tea Drying

2026-04-17 08:08:18

Discover technical solutions for uneven moisture in tea drying. Learn how to troubleshoot airflow, calibrate sensors, and optimize batch loads for perfect tea processing.

Mastering Tea Processing: The Essential Guide to Tea Rolling

Mastering Tea Processing: The Essential Guide to Tea Rolling

2026-04-15 16:40:42

Discover the art and science of tea rolling. Learn about different rolling classifications, techniques to improve tea quality and efficiency, and the best tea rolling machines for your production.

Contact us

Quanzhou Deli Agroforestrial Machinery Co., Ltd.
If you want know more about our products, please send email to us : info@delijx.com. You also can send message to our WeChat or WhatsApp : 0086-18120033767

Q: What is pile-fermentation?

Why need pile-fermentation? Pile-fermentation is the most important process in the production of Pu'er tea ripe tea and black tea, it is a key step in forming the unique taste of black tea.

Through the moist heat effect of pile-fermentation, it promotes the conversion of the contained substances, reduces the bitterness, makes the taste mellow, eliminates the odor, develops a special aroma, destroys the chlorophyll, and changes the leaf color to dark yellowish brown, which produces the unique aroma of black tea. (Similar to musty, but a fragrance).

Because of the special nature of the pile-fermentation, long time and high temperature, and the large number of batches processed, pile-fermentation trough are usually used. If the family produces in small batches, use clean containers. In addition, the tea used in pile-fermentation must be green tea, otherwise it will not succeed.


 

The processing of pile-fermentation: The dried green tea is evenly sprayed with water mist to increase the water content of the tea to 30%. Then pile up the tea leaves and cover them with a clean cotton cloth to keep them warm and allow the tea leaves to ferment naturally.

The fermentation temperature should be maintained between 40-60°C. The fermentation time is about 35 days, and it is flipped every 10 days. A total of about 3-4 flips are required.

When in the pile-fermentation, insert a thermometer into the pile of tea to observe the temperature change of the tea leaves. If the temperature exceeds 60°C, the tea leaves need to be spread out immediately to cool the tea leaves. If the temperature is lower than 40 degrees, it means that the water is insufficient, and you should spread out it immediately and add water to raise the temperature of the tea pile.

After 30-40 days of pile-fermenting, the color of the tea leaves becomes dark brown, with a special scent (mouldy fragrance). The flavor of the tea soup is strong and mellow, and the fermenting can be completed and dried.