Method for preparing high-fragrance mulberry leaf black tea

Abstract

The invention belongs to the technical field of tea product processing, and particularly relates to a method for preparing high-fragrance mulberry leaf black tea. The method comprises the following steps: (1) picking up raw materials; (2) making green in a roller, namely putting mulberry leaves which are three fifths weight of raw materials in the step (1) into an iron roller for making green; (3)freezing for making green, namely putting the rest mulberry leaves in the step (1) into a refrigeration house at negative 30-negative 35 DEG C to freeze for 80-90 minutes; (4) withering with simulated sunlight; (5) twisting and fermenting; (6) fermenting at low temperature, namely transferring the mulberry leaves in the step (5) into a fermentation chamber at 20-22 DEG C, keeping humidity to be 90-95%RH, spraying fragrance-promoting liquid to the surface of the mulberry leaves, and fermenting for 100-120 minutes; (7) drying at high temperature; and (8) cooling and packaging. The method can beused for improving the fermenting degree of mulberry leaves and furthest maintaining the theaflavin and thearubigins in mulberry leaf black tea, and the mulberry leaf black tea has the advantages ofexcellent quality in color, fragrance and flavor.

Description

technical field [0001] The invention belongs to the technical field of tea product processing, and in particular relates to a method for preparing high-fragrance mulberry leaf black tea. Background technique [0002] Mulberry leaves are known as "immortal grass", which are rich in amino acids, polyphenols, flavonoids, high-quality proteins, polysaccharides, organic acids, alkaloids, vitamins, zinc, calcium, phosphorus, manganese, iron, etc. Trace elements are recognized by the Ministry of Health of the People's Republic of China as "medicine and food of the same origin" plants, and are listed as "one of the top ten health foods for human beings in the 21st century" by the International Food Hygiene Organization, becoming the source of new green food for human beings. [0003] Mulberry leaves are particularly effective in lowering blood sugar and other aspects, and are especially popular among middle-aged and elderly people. However, due to the cold nature of mulberry leaves,...

AI Technical Summary

Problems solved by technology

[0003] Mulberry leaves are particularly effective in lowering blood sugar and other aspects, and are especially popular among middle-aged and elderly people. However, due to the cold nature of mulberry leaves, drinking too much will cause too much burden on the spleen and stomach. Fermentation treatment of mulberry leaves can solve this problem. Problem; In addition, due to the impact of the environment in recent years, the traditional mulberry leaf sericulture has been in a downturn, and the phenomenon of destroying mulberry and abandoning it is very common. In order to change this state, a way out should be found from the comprehensive utilization of mulberry leaves, such as The tea processing of mulberry leaves is the first choice, so, the tea processing of mulberry leaves has become the direction that those skilled in the art urgently need to work hard.

[0004] The inventor of the present application found through searching that the processing of mulberry leaf black tea in the prior art cannot get rid of the technical category of traditional black tea processing, and the manufactured mulberry leaf black tea has dark color, weak taste and insufficient aroma. The composition of black tea is very different. The key to black tea technology is that polyphenols undergo a series of chemical reactions under the action of oxidase to produce the unique color, aroma and taste of black tea, while the polyphenols in mulberry leaves are less and more Phenolic substances are the main material components that form the taste of mulberry leaf tea. Therefore, processing mulberry leaf tea according to the traditional black tea processing technology will not only slow down the fermentation, but also affect the quality of mulberry leaf black tea.