How long can the roasted coffee beans be preserved? does the storage time have anything to do with the degree of roasting?

How long can roasted coffee beans last? -Does storage time have anything to do with roasting?

The freshly roasted coffee beans emit carbon dioxide, making the pressure in the package higher than atmospheric pressure. The pressure helps the fusion of aromatic substances and oils, so that all aromatic substances inside the coffee beans can be easily extracted.

unroasted coffee beans

Coffee beans can be stored for several years if kept dry and unroasted. During roasting, the oil from the beans migrates to the surface and spoils rapidly. Therefore, after the coffee beans are roasted, the storage method becomes particularly important.

roasted coffee beans

Whole beans that have been roasted and released fat can be stored in an airtight container at cool, dry room temperature. Whole coffee beans can be kept for a month under these conditions

One-way valve packaging: small bags and cans can be used. After brewing, coffee is put into a special vacuum container with a one-way valve. This valve allows gas to go out but cannot come in. There is no need for a separate storage stage. However, due to the degassing process, the aroma will be slightly lost. It avoids the formation of spoilage flavor, but it cannot prevent the loss of aroma. Because coffee will emit more than three times its own volume after roasting. If the coffee beans are constantly in contact with the air, it will accelerate the oxidation of fat and make the coffee taste lost.

Coffee beans can be placed in the refrigerator, the temperature is reduced, and the oxidation rate of coffee beans is slower. However, if the coffee beans have been opened, it is not recommended to put them in the refrigerator. Among the important elements affecting coffee, humidity is the most important to the taste of coffee. Coffee beans will absorb moisture and the taste will deteriorate to a large extent.