There are five reasons why Tieguanyin's storage method affects the quality of tea: moisture, temperature, air, light and peculiar smell. Generally, low temperature and sealed vacuum are needed to ensure the color and fragrance of Tieguanyin in a short time. However, in actual preservation, it often happens that the color and fragrance of tea leaves are not as good as when brewing, because of the dryness after fermentation.
1, in modern storage methods, the effect is better:
Pumped nitrogen storage method
In a closed container, nitrogen is used instead of air, so that tea leaves can be preserved under oxygen-free conditions. The specific method is as follows: first, put the dried tea leaves into a tea pot or aluminum foil bag with a crimping cover, then remove the air, fill in pure nitrogen, and finally seal. Tea leaves are stored in nitrogen-filled containers, which can prevent the deterioration of tea contents due to Geng nitriding. At room temperature, the quality can be kept unchanged for one year. If it can be preserved at low temperature, the preservation effect will be better.
Low temperature storage method
In order to prevent tea from oxidative deterioration at low temperature. Specifically, dry tea leaves (the water content of tea leaves is below 5%) are put into a well-sealed container and stored at a low temperature below 3 degrees Celsius. For bulk tea storage, a special cold storage should be built to prevent moisture and heat, and the relative humidity of the air in the storage should be kept at about 50%.
2. A small amount of tea consumed at home is often stored in cans.
It is best to use tin cans or tin cans with double lids. Wrap the tea leaves in paper, or put them directly in a jar. Shake tightly as far as possible, leaving no gap, reducing the air in the pot, which is conducive to maintaining the quality of tea. After installation, cover the double cover and seal the cover with adhesive tape. The pot is covered with two layers of nylon bags, and the bag mouth is tightly tied. If this pot of tea is stored in the refrigerator or dryer, the effect will be better.
The role of Tieguanyin I. The anti-aging effect of Tieguanyin
Some scientific studies at home and abroad show that human aging is related to the peroxidation of unsaturated fatty acids in the body, and the peroxidation of unsaturated fatty acids is related to the action of free radicals. Free radicals with high chemical activity can make unsaturated fatty acids over-oxidized, make cell function mutate or decline, cause tissue proliferation and necrosis, and produce fatal diseases. Lipid peroxidation is the devil of human health, but the culprit is free radicals. As long as free radicals are removed, cells can grow and develop normally, and live a long and healthy life.
Commonly used antioxidants are vitamin C and vitamin E, which can effectively prevent the over-oxidation of unsaturated fatty acids. Recently, Japanese researchers have shown that polyphenols in Tieguanyin can prevent excessive oxidation; Purine alkaloids can indirectly scavenge free radicals, thus achieving the purpose of delaying aging.
2. The anticancer effect of Tieguanyin.
Nowadays, cancer seriously threatens people's health? An incurable disease? . Therefore, in recent years, the anti-cancer research of tea has aroused great interest and concern. A few years ago, it was reported that the esophageal cancer of Shanghai residents decreased year by year because of drinking tea, so the fact that drinking tea can prevent cancer caused great repercussions all over the world. Nowadays, drinking tea to prevent cancer has been recognized by the world, and Tieguanyin is the best anticancer effect in tea.
As early as 1983, Professor Tuonan Okuda of Okayama University in Japan had screened out the anticancer effects of dozens of plant polyphenols. The results showed that catechin (EGCG) had strong anticancer activity. Another scientist believes that Tieguanyin tea polyphenols are the main active ingredient in the study of confirming Tieguanyin's anti-mutation. In the study of chemical carcinogenesis, the preventive effect of Tieguanyin tea polyphenols has been affirmed. In addition, vitamin C and vitamin E in Tieguanyin can block carcinogens? The synthesis of nitrosamines plays an important role in cancer prevention and treatment.
The efficacy of various teas 1, Tieguanyin: Besides the general health care function of tea, it also has the effects of anti-aging, anti-cancer, anti-arteriosclerosis, diabetes prevention, weight loss and bodybuilding, reducing fire, quitting smoking and sobering up.
2, Pu 'er tea: At the same time, it has the functions of clearing away heat and relieving summer heat, detoxifying and promoting digestion, reducing fat and relieving boredom, promoting diuresis and relaxing bowels, eliminating phlegm and expelling wind, relieving cough and promoting fluid production, benefiting qi and prolonging life. As Pu 'er tea has changed from raw tea to cooked tea, its raw tea has the effects of dispelling pathogenic wind, relieving exterior syndrome and clearing the head, while cooked tea has the effects of regulating qi, diuresis and relaxing bowels.
3. Wuyi rock tea: contains a variety of chemical elements, caffeine, tea polyphenols and lipopolysaccharide. Its pharmacological characteristics are particularly remarkable, which can not only wake up the heart, improve eyesight, strengthen the heart, relieve annoyance, quench thirst, sterilize, decontaminate, induce diuresis, relieve summer heat and sober up. It also has the effects of lowering blood pressure, losing weight, resisting radiation, preventing cancer and delaying aging.
4. Longjing Tea: It can purify blood vessels and prevent stroke and heart disease.
5. "Biluochun" belongs to green tea, which has the functions of anti-aging, antibacterial, anti-cancer, lipid-lowering, slimming and fat-reducing, dental caries prevention, halitosis elimination, cancer prevention, whitening and ultraviolet protection.
6. Huangshan Mao Feng: It is beneficial to promote blood circulation, reduce cholesterol, increase single capillary and enhance blood anticoagulation. At the same time, Huangshan Mao Feng can also play a certain role in preventing cancer.
7. Lushan Yunwu Tea: It has six functions: reducing blood fat, losing weight, lowering blood pressure and resisting arteriosclerosis; Inhibit tumor cell production; Nourish and protect the stomach; Healthy teeth and tooth protection; Anti-inflammatory, sterilization and treatment of dysentery; Anti-aging and the like.
8, Lu' an melon tablets: conducive to the prevention and suppression of cancer; Conducive to the health care treatment of cardiovascular diseases; Conducive to losing weight and cleaning intestinal fat; Conducive to clearing away heat, eliminating dryness, expelling toxin and caring skin.
9. Junshan Silver Needle: It has all the health-care functions of general tea: excitement to relieve fatigue, benefit thinking and sleep less, digestion to eliminate phlegm, detoxification to quench thirst, diuresis to improve eyesight and increase nutrition. It also has antibacterial, antioxidant, anti-aging and anti-cancer effects.
10, Xinyang Maojian tea: Not only has high nutritional content, but also has the functions of clearing away heat and improving eyesight, quenching thirst, relieving annoyance and refreshing, helping digestion and strengthening the spleen.
Making 1 carbon-roasted Tieguanyin by traditional technology requires high-grade Tieguanyin raw materials and traditional fermentation technology in China, but the light fermented Guanyin popular in the market does not meet the requirements. Forced baking will make tea soup tasteless.
2, to have a high level of fine baking talent operation, generally requires more than ten years of baking experience, and has a high technical level; Poor technology is easy to scorch tea.
Standard principle of traditional baking technology
Carry forward its advantages and discard its disadvantages.
Baking with a small fire will not only retain its original Guanyin color, but also increase the flavor of baking, and the quality will be excellent.
Bake in medium fire to remove bitterness.
High fire baking, this raw material is generally bitter, and high fire baking can be completely removed.
The tea leaves of carbon-roasted Tieguanyin are sweet and have a unique taste. After tasting, the throat is particularly relaxed and free, with a strong smell of fire. After brewing, the soup is brownish red and bright, with rich aroma and sweet taste. Tea is warm and cool, and it is the best in tea.