Processing method of yuqing black tea

A processing method and technology of black tea, which is applied in the processing field of Yuqing black tea, can solve the problems of thin and astringent taste, long greening time, high breathing consumption, etc., achieve red leaves at the bottom of the leaves, accelerate the withering process, and make the strands heavy Effect

Pending Publication Date: 2016-09-21
TEA RES INST OF FUJIAN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it takes a long time to make green, and the respiration of the substances in the leaves consumes a lot. If the production is not timely, and "three-day tea" is made, it is easy to cause "big water" and "green green". Sentimental

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A processing method of Yuqing black tea, comprising the steps of:

[0025] S1. Set the concentration to 1.0×10 -6 The Aspergillus niger monospore suspension was inoculated on the fermentation medium and cultured at 25°C for 96 hours, filtered with qualitative filter paper, and the filtrate was collected after the cultivation was completed;

[0026] S2. Selecting 1 bud and 2 leaves or the same tenderness pair-clamped rainwater fresh leaves are placed in the filtrate obtained in step S1, and soaked at 30°C for 30 minutes;

[0027] S3. After the soaking treatment is completed, clean the filtrate on the fresh leaves with deionized water, spread them thinly, place them in the withering tank at room temperature, spread the leaves at a thickness of 3cm, spread them at 6°C for 1 hour, and turn them over 1-2 times in the middle;

[0028] S4. Shake the green leaves three times after the thinning treatment, the speed is 60r / s, and the shaking time is 1min, 2min, and 3min respecti...

Embodiment 2

[0033] A processing method of Yuqing black tea, comprising the steps of:

[0034] S1. Set the concentration to 1.0×10 -6 The Aspergillus niger monospore suspension was inoculated on the fermentation medium and cultured at 25°C for 108 hours, filtered with qualitative filter paper, and the filtrate was collected after the cultivation was completed;

[0035] S2. Selecting 1 bud and 2 leaves or the same tenderness pair-clamped rainwater fresh leaves are placed in the filtrate obtained in step S1, and soaked at 30°C for 30 minutes;

[0036] S3. After the soaking treatment is completed, clean the filtrate on the fresh leaves with deionized water, spread them thinly, place them in the withering tank at room temperature, spread the leaves at a thickness of 5 cm, spread them at 8°C for 1 hour, and turn them over 1-2 times in the middle;

[0037] S4. Shake the green leaves three times after the thinning treatment, the speed is 70r / s, and the shaking time is 1min, 2min, and 3min respec...

Embodiment 3

[0042] A processing method of Yuqing black tea, comprising the steps of:

[0043] S1. Set the concentration to 1.0×10 -6 The Aspergillus niger monospore suspension was inoculated on the fermentation medium and cultured at 25°C for 102h, filtered with qualitative filter paper, and the filtrate was collected after the cultivation was completed;

[0044] S2. Selecting 1 bud and 2 leaves or the same tenderness pair-clamped rainwater fresh leaves are placed in the filtrate obtained in step S1, and soaked at 30°C for 30 minutes;

[0045] S3. After the soaking treatment is completed, clean the filtrate on the fresh leaves with deionized water, spread them thinly, place them in a withering tank at room temperature, spread the leaves at a thickness of 4cm, spread them at 7°C for 1 hour, and turn them over 1-2 times in the middle;

[0046] S4, shake the blue and green leaves three times after the thin stall treatment is finished, the rotating speed is 60-70r / s, and the shaking green an...

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PUM

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Abstract

The invention discloses a processing method of yuqing leaf black tea. The method comprises the following steps that aspergillus niger monospore bacterium suspension is inoculated onto a fermentation culture medium for culture, and then, filtrate is collected; gfresh leaves picked up in rainy seasons are put into the obtained filtrate for soaking treatment; then, deionized water is used for cleanly washing the filtrate on the fresh leaves for thin spreading treatment; after the thin spreading treatment is completed, green leaf rocking is performed for three times; after each time of green leaf rocking, rocked green leaves are immediately put into a 30-35 DEG C RH45-55 percent 13000-23000 Lux LED (light emitting diode) blue light illumination withering room for green leaf cooling; after the former twice green leaf rocking, the green leaf cooling time is 30 to 50 minutes, and the last green leaf cooling time is 20 to 30 minutes; the obtained tea leaves are sequentially subjected to rolling treatment, pile fermentation treatment, secondary rolling, rehydration and freeze drying treatment, and a finished product is obtained. The processing method is favorable for synthesis and expression of good aroma ingredients in the tea leaves. The obtained black tea has the advantages that the color and luster are black bloom; strips are heavy and solid; the tea water color is golden red, transparent and bright; the taste is sweet and pure; the leaf bottom is brilliant red.

Description

technical field [0001] The invention relates to the field of tea processing, in particular to a processing method of Yuqing black tea. Background technique [0002] During spring tea picking and processing, it often catches up with continuous rain. During the rainy season, the picked tea green is called "rain water green". At this time, the fresh leaves have a lot of water content and relatively less inclusions; under the premise of high humidity, the water of the green leaves is slowly diffused, which affects the chemical changes in the leaves. Moreover, it takes a long time to make green, and the respiration of the substances in the leaves consumes a lot. If the production is not timely, and "three-day tea" is made, it is easy to cause "big water" and "green green". Sentimental. Therefore, it is very difficult to make "Yu Shui Qing" well. Contents of the invention [0003] In order to solve the above problems, the present invention provides a processing method of Yuq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/10
Inventor 张文锦朱留刚孙君高香凤陈祖枝余海燕
Owner TEA RES INST OF FUJIAN ACADEMY OF AGRI SCI
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