Tea is a magical leaf that contains a lot of nutrients, and regular drinking is good for your health. Nowadays, many people also have the habit of drinking tea, and some tea fresh will be kept at home. So, how can tea be kept fresh? To keep the tea fresh, it is necessary to look at the tea with different degrees of fermentation. Let’s take a look at it in detail.
How to keep tea fresh?
1. Non-fermented tea.
Non-fermented teas include green tea (such as Longjing, Biluochun), yellow tea (such as Junshan Silver Needle, Mengding Yellow Bud), white tea (also called slightly fermented tea, such as Shoumei, silver needle). It is the most aging tea among all teas. It easily loses its lustrous color and unique aroma. It contains high amounts of vitamins and active nutrients and is easily damaged. Therefore, the storage requirements are also very high.
Basically, storage must be done: sunscreen, moisture, odor. For home storage, green tea is recommended to be placed in a large dry coffee bottle. You can take the napkin and put it in the microwave oven, use the “thaw” file to dry for two minutes, spread the dried paper (cotton paper is better) in the tea pot, and then put the tea leaf in and close the lid. Finally, put a fresh-keeping bag on the outer cover of the tea can and put it into the refrigerator freezer.
If you put it out after one or two years, the color, fragrance and taste will remain the same. In a large number of cases, tin cans, iron cans, food bags, thermos bottles, and other sealable containers can be used to store tea. The containers should be lined with food film bags, and the container opening should be opened as little as possible. To reduce the oxidative deterioration of tea.
Conditional use of oxygen and nitrogen bags to store tea leaves, or the air in the tea bags is immediately sealed after the air is pumped, so that the vacuum state is formed in the packaging bag, thereby blocking the oxidation and deterioration of the tea leaves and achieving the purpose of keeping fresh. When vacuum packaging, the selected bag container must be aluminum foil with good gas barrier (oxygen barrier) performance or other composite film materials with more than two layers, or iron and aluminum quality cans.
2. Semi-fermented tea.
Semi-fermented tea is oolong tea and can also be called green tea. It has both the characteristics of non-fermented tea and the characteristics of fully fermented tea. Therefore, storing green tea must be like storing green tea: sunscreen, moisture, odor. However, green tea is fermented, so it is slightly easier to store than green tea. If you don’t hide the freezer, green tea will last for about one year, while green tea will last for two or three years. Green tea is divided into light roasting and heavy roasting; It has light fermentation and heavy fermentation.
Generally speaking, those with light roasting and light fermentation are more similar to green tea. Therefore, the lifespan is short, and if you store it for a long time, you have to hide it. Some alpine oolongs in Taiwan are fermented slightly and their life span is as fragile as green tea.
The storage methods of semi-fermented tea and non-fermented tea are basically similar. However, due to the longer life of green tea, storage requirements can be relaxed. According to the light and heavy roasting and light fermentation of green tea, the tea can be stored in time, and the freshness of the green tea can be preserved. Some green teas, such as the Rock Tea of Wuyi Mountain, are sometimes deliberately hidden for a long time. After two or three years of scent gradually disappearing, it will have a medical benefit. The locals peeled the grapefruit skin to get the grapefruit meat, then stuffed the rock tea into the grapefruit skin, and then stitched it back to the grapefruit shape with needle thread. The whole grapefruit skin wrapped with tea leaves hangs in a ventilated place and is dried in the air. It is said to have a medical benefit. This tea is called citron tea and is also a method of storing tea leaves.
3. Fully fermented tea.
Fully fermented teas are black tea and dark tea. After a complete fermentation process, this tea has no green tea characteristics and qualities. The essence and taste of the tea has been converted into a unique taste after fermentation. This taste is the longer the more mellow, the higher the value. The method of saving can be more extensive. Because they age slowly, they are easier to store. Keep away from light, high temperature and smelly items, it can be stored for a long time.
Sometimes, as long as the ambient humidity is not too high, a less sealed container is also acceptable, so there is no need to take special protection against moisture and sun. However, it is also possible to seal it, so as not to be attacked by odor. For example, Pu-erh tea can use the “pottery jar stacking method”: take a wide-mouth pottery jar and mix old tea and new tea into the jar to facilitate aging.
For the tea cake to be drunk, the whole piece can be disassembled into loose tea and placed in a pottery jar (do not choose a non-breathable metal jar), and it can be taken after being left for half a month. This is because ordinary tea cakes are often loose on the outside and strong in the center. After the above-mentioned “tea tempering method”, you can complement the inside and outside to keep tea fresh and enjoy a higher quality tea soup.
The specific method of leaving tea fresh.
1. The simplest refrigerator preservation: Put the tea leaves in a dry, odorless, sealable container and put it in the refrigerator freezer. If the quantity of tea is small and very dry, it can also be packed and sealed in a two-layer moisture-proof film bag and placed in the refrigerator.
2. The most common storage method of iron cans: Put the tea leaves into the iron tea cans with double lids, it is best to fill them without leaving gaps, so that there is less air in the cans. The double-layer lid should be tightly closed, and the gap between the lids should be glued together, and the tea canister should be put into two layers of nylon bags, and the mouth should be sealed to achieve the best storage benefit.
3. The most convenient storage method of the composite film bag: put the tea fresh leaves into the composite bag, squeeze out the air in the bag, seal the bag mouth with a sealing machine, then put on a plastic bag, tie the bag mouth tightly, and put it in the lower compartment of the refrigerator refrigeration.
4. The most practical storage method for thermos flasks: put the tea fresh leaves into a dry thermos flask, cover the stopper, seal it with white wax, and seal it with tape. In addition, what we want to be legal is that the moisture content of the tea during storage: green tea cannot exceed 5%, and black tea does not exceed 7%. We can fry or dry the tea leaves before collecting them; tea also needs to be protected from light and heat, so there are certain requirements for the storage environment.