How can coffee beans be stored for longer? How to extend the shelf life of hand-brewed coffee beans?

With the Spring Festival approaching, it is also a special Spring Festival, and many express deliveries are suspended one after another. The clever friends have prepared the surplus grain for the winter and stored the coffee cabinet full.

However, with only half a month to go before the Spring Festival, how to preserve coffee beans has become a big problem for friends. There are three taboos when preserving coffee beans: high temperature, humidity and oxidation.

Coffee beans volatilize aroma substances very quickly when they are higher than normal room temperature, and exposure to sunlight is more likely to breed fungal bacteria, leading to deterioration. It can be said that people in Lingnan have a deep understanding of dampness. going back to the south has led to all kinds of damp mildew and deterioration in the room, and so are coffee beans, which are easy to mildew and deteriorate when they are damp. Oxidation is a reaction that occurs after food is in full contact with oxygen. Peeled apples and potatoes turn reddish brown after being exposed to external air for a period of time. The oxidation of coffee beans is not as obvious as these, but with continuous exposure to oxygen, the taste period of coffee beans will be greatly shortened. So, usually, Qianjie's advice is to leave the original package intact in a cool, dry place after receiving the goods, and pick up another pack when you need it.

Q: is it best to open the bag and put the coffee beans in a sealed can as soon as you receive them? If the coffee beans have been opened, it is the best choice to store them in a sealed jar so that the flavor of the coffee beans can be preserved as much as possible. But if it is not opened, it is best to put it in a cool and dry place directly in the original package. the coffee bag is equipped with an one-way exhaust valve so that the pressure can be relieved when the air pressure inside is too high, while the sealed jar does not have this function. The process of putting coffee beans in the jar itself is already discouraged and exposed to the air, which is suspected of being superfluous.

When you drink, open the bag and put it in a sealed jar for preservation Q: is it best to put it in the refrigerator or frozen? Qianjie also saw a lot of strategies for storing beans. Keeping them in the refrigerator can effectively reduce the oxidation reaction of coffee beans. Qianjie has also done corresponding experiments, putting in a fresh-keeping layer of 5-15 degrees Celsius and a cold layer of-20 degrees Celsius respectively. It is undeniable that cryopreservation does effectively slow down the oxidation of coffee to achieve a longer taste time. However, to achieve this effect is also quite demanding, I believe that the refrigerator at home is not just coffee beans, fruits, leftovers, drinks these are frequent customers of the refrigerator, in such a complex link, the smell is indispensable, coffee beans absorb the smell in the refrigerator will "destroy" coffee. Then there is the problem of thawing. In the fresh-keeping layer, the temperature of the coffee is not so ridiculously low, but if it is immediately ground and brewed, it is generally lower than the normal temperature in the brewing process, so the taste of the coffee will not be enough. If the coffee taken out of the refrigerated layer is to be thawed, thawing can not avoid the production of water vapor, which is condensed by water vapor in the air, that is to say, it is very susceptible to moisture. If we can simply solve the problems raised by Qianjie, cold storage is also a good choice.

This kind of protection is more comprehensive, friends without conditions or do not put the refrigerator, so friends hoarding goods for the Spring Festival or honestly follow the dark, dry, sealed preservation principles to preserve coffee beans on it.