email

One Of Factors For Black Tea Sourness: Tea Rolling

Home > News > Tea Industry NewsOne Of Factors For Black Tea Sourness: Tea Rolling

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 : 0086-17750811550

One Of Factors For Black Tea Sourness: Tea Rolling

2022-02-25 16:34:13

After the withering is over, black tea production comes to the second process - rolling.

The purpose of black tea rolling process is very clear. One is to destroy the inner wall of the tea leaves, allowing the tea juice to flow out, which is convenient for shaping the shape; the other is to promote the enzymatic oxidation of polyphenols, and then promote the formation of theaflavins, thearubigins and other substances.

The details of the rolling process are also very important, and have an important impact on whether the tea leaves are sour.

If the amount of fresh leaves is too much during the black tea rolling process, or the rolling time is too long, or the rolling force is too strong, the tea leaves will not be able to dissipate heat and breathe, and the internal temperature and humidity of the tea leaves will exceed the standard, which will eventually make black tea. Produce bad fermentation, with sour taste.

Therefore, it is very important to choose a suitable black tea rolling machine according to the shape and size of the tea itself. Our company has adjusted the rolling machine according to the shape and rolling needs of tea in different regions. The black tea rolling machine makes both large-leaf tea and small-leaf tea can be kneaded properly. Avoid the unfavorable factors that make black tea sour during the rolling process.