Tea has strong hygroscopicity and taste absorption, and it is easy to absorb moisture and smell in the air. If the storage method is slightly improper, it will lose its flavor in a short time, and the more clearly fermented and fragrant precious tea leaves are, the more difficult it is to preserve. Usually, after tea leaves are stored for a period of time, the aroma, taste and color will change, and the original new tea leaves will disappear and the old taste will gradually appear. Most of the tea purchased by ordinary families is canned or bulk tea. Because it is not soaked at one time after buying it back, it will encounter storage problems.
Choose sealed plastic bags for food. The density is better after eleven o'clock. Do not use odorous or recycled plastic bags. Try to squeeze the air out of the bag when the tea leaves are full. It would be better if it could be put in a second plastic bag in reverse. Tea leaves are not easily exposed to the sun when packed in transparent plastic bags. The principle of packaging tea with aluminum foil is similar to that of plastic bag. In addition, the bought tea leaves are all bagged, sealed and put into the refrigerator, and then brewed in batches, which reduces the chance of contact with air after the tea leaves are opened and delays the occurrence of quality deterioration.
Metal cans containing tea should be placed in a cool place, not in direct sunlight, smelly, humid and hot places. In this way, the tin can is not easy to rust, and it can also slow down the aging and deterioration of tea. In addition, the tin can is made of dense material, which has good moisture-proof, oxidation-proof, light-blocking and odor-proof effects.
Keep the storage environment of tea below 5 degrees Celsius, that is, use cold storage or freezer to store tea. When using this method, we should pay attention to: if the storage period is less than six months, it is most economical and effective to keep the refrigeration temperature at 0 ~ 5 degrees Celsius; If the storage period exceeds half a year, it is best to freeze (-10 to-18 degrees Celsius). It is best to store it in a special cold storage (freezing) warehouse. If it must be refrigerated (frozen) with other foods, tea leaves should be packaged and completely sealed to avoid absorbing odor. The air circulation in the cold storage (freezing) is good and the cooling effect is achieved. When buying a large amount of tea at a time, you should first pack it in a small bag (can) and put it in a cold storage (freezing), and take out the required amount of brewing each time. The same bag of tea should not be frozen and thawed repeatedly. When the tea leaves are taken out of the cold storage (freezing), the temperature of the tea leaves in the teapot should be raised to near room temperature before the tea leaves can be taken out. If the teapot is suddenly opened, the tea leaves will easily condense water, and the water content will increase, which will accelerate the deterioration of unfinished tea leaves.
Tea can only be stored for a long time when the water content is controlled at 3-5%, and the drying degree of baking has a very important relationship with the storage period of tea. Generally speaking, those with heavy fire and low water content can be stored for a long time.
When the best storage period of tea leaves expires, they should be taken out and baked again. You can clean the rice cooker until it has no taste. After drying, pour the tea leaves into a rice cooker on a porcelain plate or tin foil paper. Turn the switch to the [heat preservation] position, and turn the cover to the half-open position. After about half a day, the tea leaves turn from old to fragrant, and it is advisable to crush them with your thumb. After cooling, they can be packaged and stored.