Is it better to refrigerate or freeze tea? What is the reason?

In terms of fragrance preservation, the freezing effect at -70℃ is remarkable; According to expert appraisal, frozen tea can prevent the oxidation rate of tea. For the aroma and taste of tea, the color lasts longer than the general preservation methods.

Whether refrigerated or frozen, the optimum water content of these stored tea leaves should be between 4% and 5%, and they should be stored in a sealed way. Compared with green tea, traditional oolong tea, black tea, jasmine tea, white tea, black tea and Pu 'er tea can all be stored in the refrigerator.

Because the content of polyphenols in traditional oolong tea and black tea is relatively low, it ages slowly and is easy to preserve; However, scented tea has a strong floral fragrance, and low temperature storage will inhibit its aroma and reduce its concentration. White tea, black tea and Pu 'er tea taste better. Therefore, they don't need refrigeration.

When buying a large number of tea leaves at a time, you should first pack them in small bags (cans), then put them in a cold storage (freezing) room, and take out the required amount for brewing each time. The same bag of tea should not be frozen and thawed repeatedly. Generally, half a catty of green tea and yellow tea are bagged and sealed, and one catty of fragrant oolong tea is sealed. Its advantages are: first, it is beneficial to quick freezing, avoiding the occurrence of large crystals crushing tea cells and affecting the quality of tea with unqualified humidity; Second, it can not only keep fresh and enhance fragrance, but also not destroy the whole.