How to properly prolong the fresh-keeping period of tea?

The storage of tea leaves is a very important issue. Because tea contains some unstable components, if not properly stored, these unstable components are prone to oxidation and mildew under the action of certain physical and chemical factors, which is commonly referred to as "tea change".

Usually, if the tea leaves are relatively small and can be consumed in a short period of time, they can be stored in clean and dry tea cans. However, special attention should be paid to the texture of the tea cans. It is best to use tin cans, followed by stainless steel and porcelain jars with double-layer lids. Iron cans and paper cans should not be made of plastic or other chemically synthesized materials. into jars. Even if the transparent glassware has good airtightness, it should not be used to store tea leaves for a long time, otherwise the tea leaves will be easily exposed to light to speed up the tea changing speed; the pottery pots are easy to cause the tea leaves to lose their originality due to their relatively strong air permeability. 

Some flavors are not suitable for use. In addition, the size of the tea pot should be appropriate, so that the tea leaves can almost fill the tea pot, and the air in the pot should be as little as possible. At the same time, it is also necessary to ensure that the tea pot is clean and dry, and there is no peculiar smell or miscellaneous smell. If there are more tea leaves and they need to be stored for a period of time, they should be taken seriously. Generally, the following points should be noted:

First, check the dry humidity of the tea leaves. Under normal circumstances, the moisture content of tea should be 5% to 7%. If the moisture content is too high, it is very prone to mildew during storage. Therefore, when the moisture content of tea leaves is relatively high, it should be dried first. When drying, it should be noted that the container used for drying must be clean and must not be oily, so as not to cause pollution to the tea leaves and affect the quality of the tea leaves.

Second, put the tea leaves (to cool after drying) into a tin or tinplate jar, close the lid tightly, and seal it with tape. It is best if you can put a small bag of food desiccant in the jar; You can put the tea leaves into a dry thermos bottle, close the bottle cap tightly, and then seal the bottle mouth with melted white wax; if possible, you can put the tea leaves in a clean food vacuum bag, and then use a household vacuum cleaner. The air blower evacuated it.

Third, the container for tea should be placed in a ventilated, dry, dark place, not in a place with high temperature, humidity, dirt and strong light, and no strong smelling items such as medicine, camphor, cigarettes, etc. should be placed around. Cleaning supplies and cosmetics. In addition, it should be noted that different types and grades of tea cannot be mixed and stored together; when storing black tea and scented tea, quicklime cannot be used as a hygroscopic agent.

The above-mentioned storage method can only prolong the fresh-keeping period of tea leaves, which does not mean that it can be kept fresh for a long time. Different types of tea have different shelf life due to different processing techniques. Green tea, yellow tea and white tea are non-fermented or lightly fermented teas, and are the most difficult to store. Usually, the taste of new tea begins to change after three months of listing. Oolong tea is a semi-fermented tea, and its fresh taste can be maintained for about half a year; Black tea belongs to the category of fully fermented tea, and the storage time will be longer; black tea belongs to the category of post-fermented tea, because of its unique production process, the longer the storage time, the better its quality, so it has always been known as "black gold", "" Tea Antique" reputation.

The most critical points for storing tea leaves can be summed up as follows: prevent moisture, prevent pressure, prevent odor, good sealing, and avoid light. In addition, if you want to drink high-quality tea, you must enjoy it within its shelf life.

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