I don’t know if anyone has ever tried it. Hold the bulging coffee beans with both hands, press your nose close to the small hole on the coffee bag, squeeze hard, and the fragrant coffee flavor will spray out from the small hole. The above description is actually an incorrect approach.
The purpose of exhaust valve
Almost every bag of coffee has a circle of small holes on it, and when you squeeze the coffee bag, a fragrant gas comes out In fact, these “small holes” are called one-way exhaust valves. The function is as its name suggests, just like a one-way street, only allowing gas to flow in one direction and never allowing it to flow in the opposite direction.
In order to avoid the risk of premature aging of coffee beans due to exposure to oxygen, packaging bags without breathable valves should be used for optimal preservation of coffee beans. When the beans are roasted and fresh, they should be immediately sealed in the bag. In an unopened state, the freshness of the coffee can be checked by checking the appearance of the bag for bulges, which can effectively maintain the aroma of the coffee.
Why do coffee bags require one-way exhaust valves?
Coffee is usually bagged immediately after the coffee beans have been roasted and cooled, which ensures that the flavor of the coffee beans is reduced and the possibility of loss is minimized. But we all know that freshly roasted coffee contains a lot of carbon dioxide, which will continue to be emitted for several days.
Packaging coffee must be sealed, otherwise there is no meaning in packaging. But if the saturated gas inside is not emitted, the packaging bag may burst at any time.
So we designed a small air valve that only outputs without entering. When the pressure inside the bag decreases to insufficient to open the valve disc, the valve automatically closes. And the valve will only automatically open when the pressure inside the bag is higher than the pressure outside the bag, otherwise it will not open, and outside air cannot enter the bag. Sometimes, the release of a large amount of carbon dioxide may rupture the packaging of coffee beans, but with a one-way exhaust valve, this situation can be avoided.
Squeezing coffee bags has an impact on coffee beans
Many people like to squeeze coffee bags to smell the aroma of coffee, which can actually affect the flavor of the coffee. Because the gas in the coffee bag can also maintain the freshness of the coffee beans, when the gas in the coffee bag is saturated, it will inhibit the coffee beans from continuing to emit gas, making the entire exhaust process slower and beneficial for prolonging the taste period.
After artificially squeezing out the gas inside, due to the pressure difference between the bag and the outside, the coffee beans will accelerate the removal of gas to fill the space. Of course, the coffee aroma we smell when squeezing the coffee bag is actually the loss of flavor compounds from the coffee beans.
The exhaust valve on the coffee bean bag, although only a tiny device in the packaging, plays an important role in protecting the quality of coffee. By releasing internal gases and preventing oxidation, the exhaust valve maintains the freshness and deliciousness of coffee, allowing every cup of coffee to bring you the purest enjoyment. When purchasing and using coffee packaging, remember to pay attention to this small exhaust valve, which is a guardian for you to taste delicious coffee.
Post time: Nov-26-2024