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Tea has a shelf life, but it is related to the variety of tea, and the shelf life of different teas is also different. Drinking tea is good for health, but drinking expired tea is not only not good for the body, but also harmful to physical health. How long can different tea leaves be put? What are the other benefits of expired tea leaves? Next, let's take a look.
How to understand the "shelf life" of tea?
Tea, which is essentially an agricultural product, also has a shelf life. The so-called "shelf life" can be understood as the optimal period for eating (drinking) and the safe period under the premise of correct storage.
What is the shelf life of different teas?
Usually, in addition to some other sealed packaged tea leaves after fermented tea, the shelf life is 12 months to 24 months; the shelf life of bulk tea is shorter, because its bulk placement process will absorb moisture and absorb peculiar smells, which not only makes the tea lose the original tea flavor, but also is more likely to deteriorate.
Like what:
Green tea, generally fresh is better. In the low temperature (3-5) sealed state, the quality of green tea usually does not change much for about a year and a half;
Oolong tea is generally 2-3 years old. Wuyi rock tea, the next year old tea is fragrant, mellow taste, but the shelf life is up to three years;
Guizhou Meitan hand-built black tea, Hunan black tea, Hubei green brick tea, Guangxi Liupao tea, Yunnan Pu'er tea, etc., as long as properly stored, not only will not deteriorate, but can improve the quality of tea. The best quality of black tea is about ten years, and its shelf life can reach several decades.
What is the shelf life of the six major tea types?
green tea
Drinking green tea mainly lies in a "fresh" word, so the new tea can be drunk after half a month or a month. Green tea, not fermented, the requirements for preservation are higher, a little improper preservation will turn yellow, after turning yellow, the aroma and taste will be greatly reduced.
Green tea has the shortest shelf life and requires higher preservation requirements because it has not been fermented. Generally speaking, the shelf life at room temperature is about 1 year, if it is not properly preserved, it may begin to appear yellow in 8 or 9 months, and some of it will become smelly. Of course, if you are a local tycoon and have a refrigerator that specializes in storing green tea, the shelf life can be extended to about 18 months.
Yellow tea
Yellow tea, the production process is more than green tea, is the most low-key and most non-existent tea, and it is relatively rare to sell yellow tea on the market today. Yellow tea and green tea have a similar tasting time, and it is better to reflect its quality characteristics when it is drunk that year.
Its shelf life has not grown much because of the smouldering yellow. About 1 year, it's almost the same.
white tea
White tea is a slightly fermented tea, the production process is simple, maintaining the most original taste of tea, known as "one year tea three years medicine seven years treasure" reputation. White tea was drunk that year, it was cool, and the medicinal properties were not obvious, so it was best to put it in a certain year and then drink, the nature turned warm, the taste was mellow, and the medicinal properties were more obvious.
The longer the storage year, the value and taste do not drop but rise, of course, this means that in the case of proper storage, if it is not properly preserved, even the best tea will become slag.
Green tea
Green tea, or oolong tea, is a semi-fermented tea. Drinking oolong tea focuses on aroma, so it is more flavorful to drink in the same year. Because the production process of oolong tea requires the roasting process, so the new tea production, at least 2 months, until the fire recedes and then drink, so that the taste is better, and do not worry about drinking on the fire.
However, the fragrance type Tieguanyin and Taiwan's Wenshan Bao seeds, these have not been baked or the shelf life of baking is not as long as imagined, generally speaking, it is about 18 months if it is refrigerated in the refrigerator. And those that have been roasted, like Wuyi Rock Tea, can still be drunk even after 2 years.
black tea
Black tea is a fully fermented tea and should be best drunk in the second year. The aroma of black tea at that time was better, but the taste was not so mellow, if you store it for a year and then drink it, the aroma is more elegant, and the tea soup will be softer and smoother.
Black tea is a fully fermented tea with a long shelf life and can be stored for more than 2 years. However, in general, even if it is properly preserved, there will be a phenomenon of odor change in more than 2 years, so try not to wait until 2 years later.
Black tea
Black tea is basically a post-fermented tea, which has the characteristics of becoming more fragrant and can be stored for a long time in a clean, moisture-proof and odor-free environment. However, after fermentation, there is no unlimited potential of raw pu and white tea, generally speaking, loose tea for 3 or 5 years, the taste has reached the optimal level, and if the tea is pressed tightly, 10 to 15 years will not be the same, and there is not so much room for appreciation. If the tea raw materials are of good quality, the longer they are left, the better the tea will taste. Old tea, tea is full of gas, suitable for boiling and drinking in winter.
Pu-erh tea
As the most popular Pu'er tea in recent years, the characteristics of the more aged and fragrant are "fried" by the majority of collectors. In the case of proper storage, if the tea is cooked, generally speaking, it is more than 15 years, raw tea, aged for 3 to 5 years, pressed into cakes of sun-dried green tea aged for 8 to 10 years, the taste of tea that has been aged for more than 20 years will decline in aroma and taste, and the aroma and taste of tea for more than 50 years will be thin.
How to tell if the tea leaves are expired?
To determine whether the tea leaves are expired, there are mainly the following aspects: see if it is moldy, or stale; whether the green tea is red, the soup color becomes brown and dark; the concentration, convergence and freshness of the taste decline, in addition, look at the shelf life on its packaging, and if it is bulk tea, it is best not to exceed 18 months.
Specific judgments we can classify and proceed:
1. Packaged tea leaves
Generally speaking, tea leaves with packaging will have a shelf life printed on the packaging. In this case, as long as the tea is within the indicated shelf life and is properly stored, it can be safely drunk.
2. Unpackaged tea leaves
Unpackaged tea, which refers to loose tea leaves and homemade tea leaves.
First of all, we can look at the appearance and texture of the tea leaves. In appearance, if there is an expired mold, such tea leaves usually change color, most of them are white; in texture, most of the expired tea leaves are light, and the flexibility is poor, and it will be broken when twisted.
Second, look at the smell of tea leaves and the color of tea soup. Expired tea leaves will emit a stale smell, or a significantly different smell from normal tea leaves; the color of the tea soup will also become significantly thicker and darker.
Finally, we can taste the taste of tea soup. If it is expired, for example, the original clear taste of green tea tea soup will be greatly reduced, and the bitter feeling will be more. Others, such as aftertaste or convergence, are also significantly reduced.
What are the other advantages of tea expiry?
Deodorant
Although the tea leaves are no longer suitable for drinking, after all, the quality has changed, but the aroma is still there, which can be used as a daily odor removal.
The refrigerator at home is easy to smell, and the expired tea leaves are rubbed into the refrigerator; the kitchen can also put some expired tea leaves to remove the odor.
Make fertilizer
Expired tea leaves can also be used as fertilizer for potted flowers at home. Expired tea leaves are used as fertilizer to promote plant growth and make the leaves more shiny.
You can brew expired tea leaves and then pour tea into a pot with tea, the effect is the same, simple and save money.
When ashtrays
Expired tea leaves to make ashtrays, refers to not the use of tea leaves as ashtrays, but to lay a layer in the ashtray, and then add a little water, so that the soot is not easy to produce a smelly smoke smell.
Make pillows and sachets
If there are more expired tea leaves, then you can consider using it as a pillow. Whether it is a pillow or a sachet, it can bring you a soothing effect.
Descaling
After the use of pot warmers and kettles at home for too long, there will be a layer of scale, how to remove this scale?
After brewing expired tea leaves, pour them into a kettle with scale and soak them for ten minutes to easily remove scale. In addition, washing clothes with expired tea can also restore the original brightly colored and faded clothes to their original luster!
Clean the furniture
Generally, newly purchased wooden furniture will have some unpleasant paint smell, which should not be smelled frequently. After the expired tea is brewed, it is cleaned with tea once, and the paint smell will be much lighter in an instant, and the paint smell will disappear after washing it several times. This method is safe and naturally convenient.
How to save tea leaves so that they are not easy to expire?
The most basic requirements for tea preservation are: one to dry, the other to be low temperature (generally 0-5 ° C is more appropriate).
Jar storage method
Pack the tea leaves into tinplate tea jars with double lids, preferably filled without gaps, so that there is less air in the jar. The double-layer lid should be tightly covered, the gap of the lid should be glued with adhesive tape, and the tea can should be put into a two-layer nylon bag and the mouth of the bag should be sealed.
Thermos bottle deposit method
Place the tea leaves in a dry thermos flask, close the lid tightly and seal the top of the bottle with white wax.
Generally people think that bulk tea can clearly see the shape of tea, and can judge the quality of tea in this regard, so most people like to buy bulk tea. In fact, bulk tea is constantly deteriorating in the process of sales, because the dew is placed in the air, one is to absorb moisture, the other is to absorb odor, which will lead to invisibly qualitative change of tea leaves, so that it loses the flavor of the original tea.
Compared with bulk tea, packaged tea has more advantages, such as not being easily polluted, not easy to deteriorate, and the standardized product packaging has a clear grade, production date, factory name, factory site, production standards and other content. And it can also allow consumers to identify the date of production, the tea has not expired, and whether the tea has deteriorated.