Coffee knowledge: what are the temperature and humidity requirements for coffee storage?

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There are four major factors that affect the freshness of coffee beans, namely, light, oxygen, temperature and humidity. Therefore, all the preservation methods mentioned below revolve around these four aspects.

Temperature, humidity, oxidation rate

Temperature.

When coffee beans encounter sunlight, there will be chemical changes, water evaporation, beans will begin to produce a unique odor, the main factor is that the influence of sunlight and temperature will promote the oxidation of coffee bean fat, coupled with high temperature is easy to volatilize the aroma of coffee and the excellent substances inside coffee beans. Therefore, when preserving coffee beans, be sure to avoid sunlight and ultraviolet light. Keep them in a cool, dark place after sealing.

Humidity

Freshly roasted coffee beans, with a water content of less than 5%, are the best dry state of coffee beans, but coffee is prone to moisture due to improper environmental temperature and humidity, resulting in deterioration of compounds, and coffee beans after tide are easy to cause mold growth and produce ochratoxin, which is a colorless crystal compound, which has a very serious negative impact on human health.

Oxidation rate

During the roasting process of coffee beans, the moisture of raw coffee beans is slowly released, the weight decreases, the color deepens, and the volume begins to expand. At this time, the oil and aroma in coffee beans will be slowly released, while the oil in coffee beans will produce oxidation if they come into contact with oxygen. If the degree of oxidation is too intense, it is easy to cause deterioration and decay.

1. Buy according to demand

It is recommended that when buying coffee beans, try to choose small packaging, try to buy the number of coffee beans you can drink within half a month, do not hoard beans, and buy as much as you drink.

two。 Use opaque cans to store coffee beans

"Light" is a medium for accelerating oxidation, which will increase the oxidation rate of coffee and accelerate the deterioration of coffee. If possible, please choose a bean storage tank with an opaque outer layer, or a vacuum tank can pump out the air inside the tank. It can isolate oxygen and water vapor to form a vacuum preservation state, which is a good way to preserve coffee beans.

3. Don't put the coffee beans in the refrigerator.

Opinions vary on the Internet as to whether coffee beans should be put in the refrigerator or not. But we still advise you not to put coffee beans in the refrigerator. The reason is that when coffee beans are taken out of the refrigerator, once exposed to room temperature, it is easy to produce condensed water on the outside of the coffee beans. At this time, the coffee beans will soften when the moisture is absorbed, causing the coffee beans to slowly lose their taste and go bad. Therefore, it is best to avoid refrigeration or cryopreservation as far as possible.