Shelf life of boutique coffee beans the preservation methods of coffee beans affect the factors of freshly roasted coffee beans

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introduction

"How long does coffee beans last?"

"What's the best way to preserve coffee beans?"

"Do you want coffee beans kept in the refrigerator?"

The freshness of coffee beans will directly affect the taste of a cup of coffee, and proper preservation is an important factor affecting the freshness of coffee beans.

There are two types of coffee bean preservation, one is the preservation of coffee beans, and the other is the preservation of roasted coffee beans. The preservation of raw beans needs to pay attention to the storage humidity temperature to avoid moldy worms; roasted coffee beans need to pay attention to humidity temperature and oxidation, oxidation will speed up the dissipation of roasted coffee beans flavor.

How to keep roasted coffee beans fresh?

Let's first understand the freshness of coffee beans "killer"

Coffee bean freshness "killer" ①

Light & High Temperature

The light source is sunlight. The heat of sunlight accelerates the evaporation of coffee beans 'aromatic substances (aroma). The inner layer of coffee beans sold by Front Street Coffee uses aluminum foil. The aluminum foil has the greatest effect on reflecting light, but it does not achieve real insulation, so the place where coffee beans are stored should be away from the place where there is heat source.

Coffee bean freshness "killer" ②

humidity

Humidity refers to moisture in the air. Originally dry coffee beans for a long time in a humid environment, even with the protection of sealed containers will not escape the invasion of moisture when opened. Wet coffee beans are easy to deteriorate, produce moldy and other miscellaneous smells, which will directly affect the performance of coffee taste, so dry environment can better keep coffee beans fresh.

Coffee bean freshness "killer" ③

oxygen

See here, you may say: "oxygen everywhere, it is impossible to avoid oxygen ~" Don't worry, here is not to eliminate coffee beans and oxygen contact, is to minimize oxygen and coffee beans contact time. After we open the coffee beans, the coffee beans still in the package/container should be sealed as soon as possible to slow down the oxidation rate of the coffee beans.

Three "killers" who understand the freshness of coffee beans

So what should be used to preserve coffee beans?

One-way exhaust valve sealed packaging bag

Freshly roasted coffee beans are packaged with one-way exhaust valves. The principle of the one-way exhaust valve is that when the coffee beans in the package continue to release carbon dioxide so that the bag reaches a certain pressure, the gas will push open the valve and exhaust. Since the valve is opened only when the pressure inside the package is higher than the pressure outside the bag, the air and moisture outside the package can be prevented from entering while exhausting the gas. It's a good idea to use coffee beans in their original packaging without a sealed container, but remember to press the seal.

vacuum sealed tank

Vacuum sealed tank is to press the exhaust button after covering the lid to exhaust the oxygen in the tank and enter the sealed state. At this time, the coffee beans will continuously release oxygen in the tank and cannot be eliminated. Under the pressure of vacuum environment, carbon dioxide will wrap the coffee beans, thus slowing down the dissipation speed of coffee flavor.

How long can coffee beans last?

The freshness of coffee beans mentioned above refers to the taste period of coffee beans, that is, the peak period of coffee beans showing flavor. Coffee beans taste period in the coffee beans after the completion of roasting 4-30 days. Coffee beans that have passed the taste period do not mean that they cannot be drunk again, but even if the coffee beans are properly preserved, the flavor of the coffee will still dissipate. Therefore, after 30 days, the coffee bean flavor may appear insufficient aroma, tasteless and so on. Flavor aside, roasted coffee beans have a shelf life of 365 days.

Can coffee beans be stored in the refrigerator?

Coffee beans should not be stored in the refrigerator. When the coffee beans are taken out after entering the refrigerated state, the large difference between the refrigerated temperature and the indoor temperature causes the surface of the coffee beans to produce moisture.

After grinding coffee beans with moisture, you will see that the coffee powder forms uneven lumps. The caked coffee powder not only affects the uniform extraction of brewed coffee, but also the wet coffee powder will be stuck in the grinding cutter. If the cutter is not cleaned and dried in time, this will always affect the flavor of each coffee bean that has been brewed.

last

Qianjie does not recommend that you buy too many coffee beans at one time. After drinking one packet, you can buy the next packet. This can ensure the freshness of coffee beans.

And those coffee beans that have dissipated flavor can be ground into coarse powder and then placed next to the refrigerator or pet nest, which can have the effect of absorbing odors ~

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