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Processing method of freeze-dried white tea

A processing method and drying technology, applied in the field of white tea, can solve problems such as the reduction of green grass gas

Inactive Publication Date: 2019-09-27
SOUTH ASIAN TROPICAL AGRI SCI RES INST OF GUANGXI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional white tea process cannot guarantee the quality. In order to further improve the quality of white tea, the present invention proposes a processing method for freeze-dried white tea in three seasons of spring, summer and autumn, and integrates the early greening and later freeze-drying technologies to make the appearance of white tea It is more beautiful, the grassy smell in the aroma is reduced, the flavor is increased, and the nutrition retention is more complete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A processing method for freeze-dried white tea, comprising the following steps:

[0022] 1) Selection of raw materials: Select Guire No. 2 tea leaves without pests and diseases, single bud, one bud and one leaf, and pick on sunny days;

[0023] 2) Withering of fresh leaves: the air temperature is 25°C, the humidity is 60%, the leaf thickness is 1.2cm, the time is 18h, and the water loss rate is 38%;

[0024] 3) Blue removal: temperature 110°C, 3 minutes, the degree requires the tender stems to be folded continuously, and the fragrance is slightly revealed;

[0025] 4) Cooling: spread the leaves to a thickness of 1.2cm, the temperature drops to 25°C, and the time is 10h;

[0026] 5) Shaping at room temperature: at a temperature of 25°C, put the cool leaves into the strip mechanism for 15 minutes until the shape of the tea leaves resembles a crescent moon;

[0027] 6) Freeze-drying: transfer the strip leaves to an ultra-low temperature refrigerator for pre-freezing for ...

Embodiment 2

[0032] A processing method for freeze-dried white tea, comprising the following steps:

[0033] 1) Selection of raw materials: Select Guire No. 2 tea leaves without pests and diseases, single bud, one bud and one leaf, and pick on sunny days;

[0034] 2) Withering of fresh leaves: the air temperature is 22°C, the humidity is 65%, the leaf thickness is 1cm, the time is 20h, and the water loss rate is 35%;

[0035] 3) Blue removal: temperature 115°C, 2 minutes, the degree requires the tender stems to be folded continuously, and the fragrance is slightly revealed;

[0036] 4) Cooling: the thickness of the leaves is 1.5cm, the temperature drops to 22°C, and the time is 12h;

[0037] 5) Shaping at room temperature: at a temperature of 22°C, put the cool leaves into the stripping mechanism for 18 minutes until the shape of the tea leaves resembles a crescent moon;

[0038] 6) Freeze-drying: transfer the strip leaves to an ultra-low temperature refrigerator for pre-freezing, and fr...

Embodiment 3

[0043] A processing method for freeze-dried white tea, comprising the following steps:

[0044] 1) Selection of raw materials: Select Guire No. 2 tea leaves without pests and diseases, single bud, one bud and one leaf, and pick on sunny days;

[0045] 2) Withering of fresh leaves: the air temperature is 28°C, the humidity is 55%, the leaf thickness is 1.5cm, the time is 15h, and the water loss rate is 40%;

[0046] 3) Blue removal: temperature 105°C, 5 minutes, the degree requires the tender stems to be folded continuously, and the fragrance is slightly revealed;

[0047] 4) Cooling: spread the leaves to a thickness of 1cm, and the temperature drops to 27°C for 8 hours;

[0048] 5) Shaping at room temperature: at a temperature of 27°C, put the cool leaves into the stripping mechanism for 12 minutes until the shape of the tea leaves resembles a crescent moon;

[0049] 6) Freeze-drying: transfer the strip leaves to an ultra-low temperature refrigerator for pre-freezing for 8 h...

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PUM

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Abstract

The invention discloses a processing method of freeze-dried white tea. The processing method has the benefits that a green removing technique is incorporated into the white tea processing process, so that the green taste of the white tea is reduced, and the flavor is better; then the white tea is subjected to vacuum freeze drying treatment in a vacuum and low-pressure environment, so that original nutritional ingredients of the white tea are preserved, and the tea is fresh and bright in color and luster, and tippy; after being freeze-dried, the tea is roasted at controlled temperature, so that the tea is not changed greatly in appearance and nutrient substances, the green taste of the tea is reduced, and the aroma and the taste are improved; the prepared freeze-dried white tea is fat and tippy, is shaped like a crescent, and is lasting in aroma, sweet and mellow in taste, fat, tender and bright in tea bottom, and high in nutrition value.

Description

technical field [0001] The invention relates to the technical field of white tea, in particular to a processing method of freeze-dried white tea. Background technique [0002] White tea is a kind of micro-fermented tea, which is a traditional famous tea created by Chinese tea farmers. One of the six major teas in China. Traditional white tea refers to a kind of tea that is processed after drying in the sun or simmering without drying or rolling after picking. It has the quality characteristics of complete buds, full body, fresh fragrance, clear yellow-green soup, light and sweet taste. [0003] Vacuum freeze-drying, also known as sublimation drying or freeze-drying, referred to as "freeze-drying" (Freeze-Dry), is a drying method that freezes the material below the eutectic point temperature and removes moisture from the material by sublimation under vacuum conditions. . Vacuum freeze-drying is a high-quality, high-value-added dehydrated food processing method, which can ...

Claims

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Application Information

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IPC IPC(8): A23F3/06
CPCA23F3/06
Inventor 阳景阳陈海生罗莲凤梁光志李子平冯红钰刘汉焱徐冬英莫小燕
Owner SOUTH ASIAN TROPICAL AGRI SCI RES INST OF GUANGXI