Preservation skills of coffee beans

Make good use of the proportion of carbon dioxide

As far as gas is concerned, the specific gravity of carbon dioxide is the same as that of air. Therefore, in the same confined space, carbon dioxide precipitates at the bottom, while air floats at the top. After understanding this truth, when you choose a container or bag, you can judge its practicality.

Use vertical sealed cans

According to this reasoning, the carbon dioxide released by fresh coffee beans will remain at the bottom of the container, forming an antioxidant layer to protect the coffee beans; and the container is best placed upright to prevent the loss of carbon dioxide in the jar or bag. Thus it can be seen that upright, tall and open containers are more suitable for preserving coffee beans.

Use a long spoon to fish for coffee beans

Carbon dioxide has a higher specific gravity than air and is deposited at the bottom of the container at one time. When taking coffee beans, remember to pour them, otherwise the carbon dioxide in the container will be poured out and it will be more and more difficult to regenerate. It is recommended that the right thing to do is to use a long spoon and reach out to the bottom of the container to get the beans, so as not to drain carbon dioxide quickly.

Use an opaque jar

Light is the medium of oxidation, and opaque jars can slow down the rate of oxidation.

Use vacuum cans

There are more and more vacuum cans on the market, and the price is also quite cheap. This kind of jar will be equipped with a mechanism, that is, by pulling or pressing, the air in the jar can be pumped out, creating a vacuum. A vacuum indicates that there is no oxygen or water vapor, which is a good place to store coffee beans.

Put it in a cool, dry place.

High temperature is easy to volatilize the aroma of coffee and the excellent substances inside coffee beans, so coffee cans should be avoided in a hot environment, preferably in a cool and dry place.

Can I store coffee beans in the refrigerator?

It is true that the low temperature in the refrigerator can slow down the natural deterioration of coffee, and it is a good storage place, but there are many situations in the environment in the refrigerator, which must be eliminated in order to effectively protect coffee beans; otherwise, it will be counterproductive.

The air in the refrigerator is cold and dry, which is easy to evaporate the moisture in the beans, resulting in the loss of fragrance; in addition, there are too many miscellaneous smells in the refrigerator, so it is more suitable to use vacuum cans to preserve coffee beans.

When coffee beans are just taken out of the refrigerator, because the temperature of the beans is too low, they will condense water vapor in the air and form small water droplets on the surface. After grinding, these droplets will form coffee powder into lumps, resulting in uneven brewing. Therefore, coffee beans should be taken out of the refrigerator before use, and after some of them are removed, put the vacuum cans back into the refrigerator as soon as possible, and grind and brew coffee quickly. If the whole bag of coffee beans is no longer put back in the refrigerator, it should be taken out 1 hour before use and unsealed after returning to normal temperature at room temperature. In this way, the surface of the coffee beans will not condense water droplets.

In addition, as the internal development of coffee is still in progress after roasting, if the freshly baked beans are put in the refrigerator, the development of flavor will stop. Therefore, it is suggested that you should keep the freshly baked coffee in a proper environment and store it in the freezer after 2-3 days after its flavor has been developed.