Coffee beans release carbon dioxide, and the different chemical substances inside the coffee powder interact and volatilize, so the flavor of coffee will be lost over time. This is why freshly roasted coffee is more expensive, but the coffee cans with the best taste will have one-way valves. This device can mainly play two roles:
1. It can prevent external air from entering the package, which will cause the coffee beans to oxidize and deteriorate
2. It can discharge the carbon dioxide released by the coffee beans out of the package. The deeper the roasting of the coffee beans, the more carbon dioxide is released. With a one-way valve, there will be no risk of bag bulging and bursting, which will cause losses.
Therefore, the storage of coffee needs to meet two conditions: light avoidance + one-way valve.
The role, use and precautions of the coffee one-way valve.
The role of the one-way valve Coffee beans will produce a large amount of carbon dioxide and other gases during the roasting process. If they are not released in time, the gaseous environment inside the package will be unbalanced, which will affect the quality and taste of the coffee. The coffee one-way valve is designed to solve this problem. It can release gas while packaging coffee beans, maintain the pressure and gaseous environment inside the package, and thus prevent the oxidation and deterioration of coffee.
The one-way valve usually adopts a high-elastic diaphragm structure, which can be closed in a compressed state and automatically open when a certain pressure is reached. This design can not only release gas continuously, but also prevent air and moisture from being sucked into the package, reducing the moisture content and oxidation rate of coffee.
1. The one-way valve is only suitable for packaging roasted coffee beans, but not for coffee beans injected with gas during the roasting process
2. The "coffee packaging bag" should have a certain thickness and toughness to ensure that the one-way valve can be stably attached to the bag to reduce the interference of external gas on the coffee. Before filling the coffee beans, the air and oxygen inside the bag should be fully squeezed out to reduce the gas pressure and avoid the one-way valve from malfunctioning.
3. The coffee bag should be stored in a dry, cool place at room temperature, away from direct sunlight and high temperature and humidity to ensure the taste and quality of the coffee. In short, although the coffee one-way valve is a small accessory, it is crucial to the quality and taste of the coffee.