Extended data
Value function
Biluochun is one of the representative products of green tea. According to the research on the health care effect of tea in traditional Chinese medicine and modern pharmacology in China, it is considered that tea tastes bitter, sweet and cool, and acts on human heart, liver, spleen, lung, kidney and five meridians.
Bitter tea can diarrhea, dispel dryness and dampness, and reduce fire; Willing to benefit and be comfortable; Cooling can clear away heat, purge fire and relieve exterior syndrome. Tea contains many compounds that are beneficial to human health. Such as catechins, vitamins C, A, caffeine, flavanols, tea polyphenols, etc.
Storage method
The storage conditions of Biluochun are very particular. The traditional storage method is to wrap the tea leaves in paper, fill them with massive lime, put the tea leaves and ash into a jar at regular intervals, and seal and absorb moisture for storage.
With the development of science, in the past few years, it was packed in three-layer plastic fresh-keeping bags, which were tightly tied layer by layer to isolate the air. Stored in the refrigerator or refrigerated room below 10℃, after more than a year of long-term storage, its color, fragrance and taste are like new tea, fresh and refreshing.
Grade standard
According to the national standards, Dongting Biluochun tea is divided into five grades according to the product quality: Grade One, Grade Two, Grade One, Grade Two and Grade Three, among which Grade One and Grade Two are the most valuable. Bud leaves gradually increased with the grade 1 ~ 7, and villi gradually decreased.
The temperature of the wok, the amount of leaves thrown and the degree of exertion increase with the decrease of the grade, that is, the lower the grade, the higher the temperature of the wok, the more Harrison thrown and the heavier the exertion. Biluochun tea is picked around the vernal equinox every year and ends around Grain Rain. Biluochun tea collected from vernal equinox to Qingming Festival has the best quality.
Usually, a bud and a leaf are used as raw materials, the bud length is 1.6-2.0 cm, and the leaf looks like a sparrow tongue, which is called "sparrow tongue". Generally, after tea on April 20, the local people are not called "Biluochun", but called fried green.
process technology
courage
The collected bud leaves must be carefully picked in time, and the fish leaves and unqualified bud leaves should be removed to keep the bud leaves uniform. It usually takes 2 ~ 4 hours to pick one kilogram of bud leaves.
In fact, the process of picking bud leaves is also the process of spreading fresh leaves, which can promote the slight oxidation of inclusions and is conducive to the formation of quality. Generally, it is picked at 5~9 o'clock, picked at 9 ~ 15, and fried at 5~ night, so that it can be picked on the same day and fried on the same day, and tea is not fried overnight.
Baidu Encyclopedia-Biluochun