Coffee novice basic knowledge: fresh roast coffee beans freshly ground coffee powder how to preserve?

Recently, a friend asked Qianjie: "Why should the stomata be stuck after the coffee beans are ground into powder, so that the carbon dioxide in the package cannot be discharged?"

The significance of exhaust holes in Coffee Packaging

Qianjie will be sealed and packaged immediately after the coffee beans are roasted and cooled, which can minimize the loss of coffee bean flavor. But freshly roasted coffee beans produce large amounts of carbon dioxide, which begins to be released continuously after baking, and if there is no place for the carbon dioxide to be discharged, it is easy to break the package because of excessive internal pressure.

This vent is actually an one-way exhaust valve device, which can release carbon dioxide and block external gas from sneaking into the stomata, reducing the rate of oxidation of coffee beans. Since the device can release carbon dioxide, the flavor of coffee can naturally slip through this vent.

Why do you have to seal the vents after grinding coffee powder?

Because to preserve the coffee flavor ~ when the coffee is a whole bean, the release rate of carbon dioxide / flavor is very slow. But once grinded, the two of them immediately released themselves, and that release rate was called a fast! So when the coffee powder is ground, you need to seal the package immediately and seal the stomata that allow the flavor to escape.

Do you still need to raise beans after freshly roasted coffee beans are ground into coffee powder?

The purpose of no need to raise beans is to let coffee beans discharge carbon dioxide from the body, on the one hand, to take away the dryness of freshly roasted coffee beans, making the coffee flavor more round and fuller; second, to reduce the impact of carbon dioxide on coffee extraction in the subsequent brewing. If it has been ground into coffee powder, it is no longer necessary to raise beans, because in the process of transportation, the pressure caused by carbon dioxide in the package can also make the coffee flavor round, so you can drink a cup of coffee powder as soon as you receive it.

Taste period of freshly roasted coffee beans after grinding

The taste period of freshly roasted coffee beans is less than 30 days after the bean cultivation period (4-7 days). When the coffee beans are ground into powder, the aroma begins to weaken and the flavor dissipates faster, so the taste period of freshly roasted coffee beans after grinding is less than 20 days.

How to preserve freshly roasted coffee beans after grinding into coffee powder?

/ put it in a cool, ventilated and dry place

Whether it is coffee beans / coffee powder, avoid putting it in direct sunlight, because the high temperature will speed up the release of coffee flavor, so the taste period of coffee will be greatly reduced. At the same time, we need to pay attention to whether the storage location is wet, the humid environment will be easy to breed bacteria, so that the coffee will not only have a moldy taste, but also affect human health.

/ completely sealed preservation

Coffee beans can be sealed and preserved in the original package, but coffee powder should be kept in a completely sealed container as far as possible. First, the oxidation rate of coffee powder is much faster than coffee beans; second, if a little bit of the original package is not sealed, the flavor will desperately slip out, so it will be more secure to keep it in a completely sealed container.

The last little nagging

Although the freshly ground coffee powder is easy to use, Qianjie still recommends grinding the coffee beans when brewing. I also suggest you drink one bag before buying it. After all, the freshness of coffee beans / coffee powder is really important!