When we purchase the coffee bag, there is a valve on the pouch named one-way valve.
The one-way valve can be understood as a small valve that can be opened outwards. And the carbon dioxide in the bean bag can be removed, but the oxygen from the outside cannot enter. So as to discharge carbon dioxide and prevent the oxidation of coffee beans
Exhaust: It means to release the carbon dioxide gas accumulated in the coffee beans after roasting. In the first week after coffee is roasted, carbon dioxide is released particularly quickly. Therefore, about a week after roasting is generally called the bean raising period.
Oxidation: It is a force that can make coffee lose its flavor. Therefore, the storage of coffee beans should be airtight, and also need to be protected from moisture and light.
If the carbon dioxide in the coffee beans has been discharged almost, continuing to use the packaging with a one-way valve will accelerate the loss of aroma substances in the coffee. Therefore, after the bean raising period, it is best to store coffee beans in an airtight container, and try to choose an opaque airtight can without peculiar smell, which can prolong the tasting period of coffee.
Post time: Jul-25-2022