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Important Process Of Green Tea- Fixation

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Why should Pu'er tea be pressed into tea cakes? 2

Why should Pu'er tea be pressed into tea cakes? 2

2022-09-22 18:15:48

Modern pressed cake is supported by science, which proves that the pressed cake has more advantages than loose tea in the process of transformation.

Why should Pu'er tea be pressed into tea cakes? 1

Why should Pu'er tea be pressed into tea cakes? 1

2022-09-22 18:08:30

The selection of history produced Pu'er tea cakes, but the unique shape of Pu'er tea has been preserved to this day due to its unique tea aroma.

How To Process Wuyi Rock Tea? 2

How To Process Wuyi Rock Tea? 2

2022-09-09 15:31:27

Proper drying can fully reflect the aroma of Wuyi rock tea in the final stage, here is the more information of the drying.

How To Prcess Wuyi Rock Tea? 1

How To Prcess Wuyi Rock Tea? 1

2022-09-09 15:24:25

Withering and shaking green are the key steps in the production of Wuyi rock tea. Welcome your contact for more details.

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Important Process Of Green Tea- Fixation

2021-06-29 16:32:11

1. The effect of temperature on enzymes

There are many enzymes in tea. For example, the presence of polyphenol oxidase can catalyze the oxidation of polyphenols and make the leaves red. If a certain method is used to destroy the activity of polyphenol oxidase, the polyphenols will lose the conditions for the oxidation reaction, so they will not quickly turn red. The "fixation" process in green tea processing is to use high temperature to "Passivation" the activity of enzymes, so that the polyphenols will not be enzymatically oxidized during the subsequent rolling and drying process, thereby maintaining the green leaves of the clear soup.

The purpose of "fixation" is to use high temperature to destroy the oxidase activity, but if it is not handled properly, not only will it not destroy the enzyme activity, but it will increase the enzyme activity, causing red tea leaves and green leaves. It can be seen that the temperature has a duality on the enzyme, that is, it increases the speed of the catalytic reaction. At the same time, the speed of the passivation reaction is also increased under high temperature conditions.

It is irreversible that the enzyme is destroyed by heat, but sometimes the fixation temperature is not high enough, and the enzyme activity is inhibited without being destroyed. After the high temperature is relieved, it will regain vitality, and red stems and green leaves will appear when they are twisted or dried.