spring is the season of new tea's coming into market. When new tea comes into market, we will buy new tea one after another, and the tea will change a little after a period of time. How to preserve the new tea? How can the new tea be preserved?
Generally, the shelf life of tea is 18 months. Drinking tea beyond the shelf life will have a bad impact on the body. Generally, the shelf life of sealed packaging tea is 12 to 24 months. You must pay attention to check when you purchase tea. And some tea species, such as Yunnan Pu'er, are more mature and more fragrant, with a shelf life of up to 20 years. The packaged tea is safer than the bulk tea. Generally, to judge whether the tea has expired, we can see whether it is moldy or stale; whether the green tea turns red and the soup turns brown and dark; whether the taste concentration, convergence and freshness decrease.
We can generally use these methods when storing tea:
1. The simplest refrigerator preservation: put the tea in a dry, odorless and airtight container bottle and put it in the refrigerator. If the quantity of tea is small and very dry, it can also be packed and sealed with two layers of film bags with good moisture-proof performance and put in the refrigerator.
2. The most common method of iron pot storage: put the tea into the iron tea pot with double-layer cover. It's better to fill it without leaving any space, so that the air in the pot is less. The double-layer covers should be tightly closed. Glue the gap between the covers with adhesive tape, and put the tea pot into the two-layer nylon bags to seal the opening of the bags. The best storage effect has been achieved.
3. The most convenient storage method of compound film bag: put the tea into the compound bag, extrude the air in the bag, seal the bag mouth with a sealing machine, then cover the plastic bag, tie the bag mouth tightly, and place it in the lower compartment of the refrigerator for cold storage.
4. The most practical storage method of thermos bottle: put the tea into the dry thermos bottle, cover the cork, seal it with white wax, and then seal it with adhesive tape.
In addition, what we want to do is to preserve the water content of tea: green tea should not exceed 5%, black tea should not exceed 7%. We can fry or dry the tea first, and then collect it; tea also needs to avoid light and heat insulation, so there are certain requirements for the storage environment.
In addition to the requirements of storage, drinking tea is also necessary. If the human body absorbs too much tea in a day, it will also have an impact on health. Generally, healthy adults have the habit of drinking tea at ordinary times. It is most suitable to drink tea between 6g-10g a day, and brew it twice-3 times. For people with large amount of physical labor, energy consumption and food consumption, especially in high-temperature environment, or people exposed to more toxic substances, it is also OK to drink about 20 grams of tea a day. However, those who eat more greasy food and have a large amount of alcohol and tobacco can also increase the consumption of tea. It should be noted that the amount of tea consumed by pregnant women and children should be appropriately reduced.
As for whether to drink cool tea or hot tea. In fact, drinking hot tea can cool down quickly, and it can also make people smart and clear-minded. Experiments show that when drinking hot tea, through sweating,
It can significantly reduce the skin surface temperature of human body within a few minutes, greatly improving the thirst feeling; while when drinking herbal tea, the skin temperature change is not obvious. Therefore, in the hot summer, it is more thirst quenching to drink hot tea.