Science Popularization | How to Store Coffee Beans
Some people always ask how to store coffee beans to keep them fresh. In fact, properly roasted coffee gradually loses its flavor over time, so it's always better to buy freshly roasted coffee to enjoy fresh coffee. To know how to store coffee beans, we first need to understand what coffee beans are afraid of.
() Afraid of Moisture
Roasted coffee is like an active state and is easily influenced by the outside world. For example, in humid places, coffee beans are very easy to absorb moisture and external flavors, which will cause coffee beans to have a strange smell. That's why I don't recommend putting coffee beans in the refrigerator, and the beans put in the refrigerator will form a temperature difference, and there will be condensation, making it difficult for coffee to retain its flavor.
() Afraid of Oxygen
Oxygen will oxidize many substances inside, which will have a negative impact on flavor and texture.
() Afraid of Light and Heat
Light and heat will accelerate various reactions, and the higher the temperature, the faster it will deteriorate, so it needs a sealed container to store coffee beans.
One-way Valve
Coffee beans contain compressed carbon dioxide gas after roasting. This gas will gradually come out from the beans, making the beans expand, so the bag has a one-way valve on the opening, allowing the gas inside to pass through the one-way valve, but it won't enter the outside. When taking out the beans, squeeze the self-seal mouth of the bag to squeeze out the gas inside, because the density of carbon dioxide is greater than that of air, so it will sink to the bottom. This squeezing will reduce the oxygen content inside a lot, which is beneficial for storing coffee beans.
Sealed Can
Sealed cans can isolate external air, but most of them use transparent materials, so they are still easily affected by light. Every time you open and close, air will enter, and the oxygen will react with the beans. Therefore, when using a sealed can, don't store coffee beans for too long.
Vacuum Can
Vacuum cans can isolate external air, but most of them also use transparent materials, so they are still easily affected by light. Every time you open and close, air will enter, and then vacuuming will remove the air inside to create a low-oxygen state, but at the same time, it creates a low-pressure state, the pressure inside the beans remains unchanged, and the difference between the inside and outside pressure increases, which will accelerate the volatilization of easily volatile aromatic substances.
Therefore, I still recommend that coffee beans be stored in a cool, dry, and dark place in the room, sealed and protected from sunlight. The best way is to buy coffee beans according to your own needs and drink them within a fresh state.
Don’t store coffee beans as coffee powder.
Even if the coffee beans are freshly roasted, once ground, the contact surface with the air increases greatly, and it will quickly deteriorate. Coffee is easy to spoil.If ground, consume within two weeks of the shelf life.Disclaimer: Some of the images in this article come from the Internet. The website respects the copyright of the original author, but due to the large number of images, we may not be able to specify the source in time, please forgive me. If the original author has any disputes, please contact the website for processing. Once verified, we will correct it immediately. ‘Coffee Workshop’ compiled and edited, please indicate if. This article is intended to spread coffee culture. If there is any infringement, please inform us to delete, thank you~!
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