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The Purpose Of The Small Hole In The Coffee Bag If you've ever looked at a coffee bag, you'll notice a button-like object on the back that may have a little hole in it called an "air valve". The purpose of this device is to allow carbon dioxide to escape from the coffee bag, because freshly roasted coffee beans must be exhausted, or more aptly put, feel like breathing. The purpose of the valve is to help the beans expel carbon dioxide, so for the coffee beans, the valve is a device that allows air to come out and not come in, effectively slowing down the aging of the coffee beans. If you want to learn more about coffee storage, Roaster Coffees provides you with more information about coffee bags. Fresh coffee beans will release carbon dioxide In the process of roasting coffee beans, some of the beans' carbon dioxide will be released, but most of the carbon dioxide remains in the beans, so the beans will slowly expel the internal gas after about two weeks of roasting. At this time, if the bag containing the coffee beans does not have an air valve to assist in the exhaust, the coffee beans in the bag will continue to exhaust, which will then make the coffee bag overstuffed. If the storage environment causes crushing pressure, the coffee bag may burst, thus destroying the preservation of the coffee beans. (You may not notice the bursting until half a day or several days later, by which time the coffee beans have deteriorated due to exposure to the air) The damage of air on coffee quality As mentioned at the beginning, the air valve of the coffee bag is an outgoing device, that is, a unidirectional air valve. The function of the valve is not only to expel gas from the coffee beans, but also to prevent outside air from seeping into the bag and affecting the quality of the coffee beans. In another article, we mentioned three major variables that affect the quality of coffee beans: oxygen, humidity, and temperature, which can shorten the optimal flavor period of coffee beans and destroy the quality of coffee beans. Therefore, it is very important to remove the internal gases without letting air in. Get More Tools: https://roastercoffees.com/caffeine-calculator/ Squeezing the coffee bag to smell the aroma? It is important to note that when carbon dioxide is expelled, it also releases a lot of aroma from the coffee beans, which is why we can smell the great aroma from the valve when we squeeze the bag. In addition, the squeezing action can also cause the coffee beans to lose their aroma and affect the quality of the coffee beans. In addition, the valve is also divided into high and low quality, when you buy the coffee bag with the store to confirm the valve used, can more effectively maintain the freshness of the coffee! (The valves used by Makoto are the highest quality Italian-made valves, which can effectively protect the quality of coffee beans!) Caffeine blocks a chemical-like receptor in the brain called adenosine, which functions to block the secretion of the already stimulated neurotransmitters dopamine and adrenaline. When the activity of adenosine is reduced, the secretion of dopamine and adrenaline increases, and the person is more alert and energized. After 30-60 minutes of coffee consumption, the concentration of both substances reaches its highest value in the body. The more coffee you consume, the more your body and brain will be slow to respond to the substances dopamine and adrenaline. You then need more stimulants to make yourself feel normal, forcing your body to produce more dopamine and adrenaline. This vicious cycle causes the adrenal glands to become exhausted ---- and no longer able to make the vital chemicals needed for neurological arousal and communication. Subsequently, you become apathetic, depressed, tired and experience feelings of inability to cope. To avoid these situations, controlling your daily intake can be a better way to drink coffee. And using a caffeine calculator can help you take better control. To summarize the functions of the valve 1. Moisture-proof: effectively maintain the dryness and aroma of coffee beans, air moisture can not run into the bag. 2. Buffering: When the coffee bag is transported to produce impact, or dropped from a height, the air inside the bag can be discharged through the unidirectional exhaust valve, reducing the impact caused by the residual gas inside the bag and avoiding the bursting of the packaging. 3. Exhaust: After the coffee is roasted, the carbon dioxide inside the bag can be effectively discharged to avoid the bursting of the package. In addition, some people may have the experience of flying with coffee beans, you will find that by the time you get off the plane, the coffee bag is already dry, like a vacuum rice packaging state, which will also affect the flavor and preservation of fresh coffee, because the cabin pressure will squeeze the air out of the coffee bag. This will also affect the flavor and preservation of fresh coffee because the cabin pressure will squeeze the air out of the bag. At this point, just tape the air valve and put it into the zipper bag to give the coffee beans an extra layer of protection. References: 1. https://www.rcuniverse.com/forum/members/coffeelover.html 2. Something About Tooth Staining Caused By Drinking Coffee - Avenza Systems | Map and Cartography Tools 3. Something About Old Beans And New Beans

Website: https://roastercoffees.com/