Coffee beans will turn into bad beans if they are not preserved well, do you know?

After the coffee beans are roasted, the oxidation and aroma volatilization are irreversible, so coffee lovers are always meticulous about the preservation of beans. "

All foods have shelf life, and the shelf life of coffee beans is also different from that of ripe beans. The flavor of coffee beans at its peak usually lasts only two to three weeks, no more than one month at most, so it can also be considered that the shelf life of coffee beans is one month. After the coffee beans are harvested, how long will the shelf life be? This is related to the density of raw beans, the uniformity of dehydration and the preservation environment.

Coffee is a fresh food, as long as it comes into contact with the air, it is easy to oxidize, so these beans must be drunk within the shelf life, otherwise they will belong to "bad beans"? A rookie asked, can I put coffee beans in the fridge? Today, Mr. Coffee is here to share with you some tips for storing coffee beans.

01

How to preserve coffee beans

Roasted coffee beans

Roasted coffee beans are easily oxidized by oxygen in the air, which deteriorates the quality of the oil and volatilizes the aroma, which will accelerate the deterioration of coffee beans after temperature, humidity and sunlight. High temperature is easy to volatilize the aroma of coffee and the excellent substances inside coffee beans. Therefore, it is necessary to keep it in an airtight, low temperature and dark place as much as possible.

Unsealed coffee beans

If the coffee beans have been opened, they need to be sealed in an airtight jar or with a special seal, and then store them in a cool, dry place.

Unopened coffee beans

If the coffee beans are unopened, it is recommended to put them in the refrigerator, as the decrease in temperature will slow down the oxidation rate of coffee beans and is suitable for storage in a cool and well-ventilated environment at a temperature of 18 °C-22 °C. Try not to put it in a place that is too dry (the humidity is below 54%).

02

Points for attention

It is not recommended to save in the form of coffee powder.

Many friends, especially those who have just come into contact with the original coffee, buy coffee powder directly, and most of them can't drink it all at once. In fact, this is very fatal to the coffee flavor damage. Not to mention whether the coffee beans are freshly roasted, even after they are freshly baked and ground, due to the substantial increase in its contact with the air and the rapid oxidation, the freshness of the coffee will be lost immediately, and the original mellow flavor of the coffee will gradually disappear. Freshly baked coffee beans are ground into powder, and the flavor changes within two or three days. So, if you are not just for a caffeinated drink, but also for a mellow coffee that represents the true coffee spirit, it is recommended that you do not buy coffee powder directly unless you consume it quickly in a day or two. buy coffee beans and a bean grinder and grind the beans before brewing.

It is not recommended to store it directly in the refrigerator, but it can be sealed into

Of course, the low temperature in the refrigerator can slow down the natural deterioration of coffee, and it is a good place to store coffee, but the air in the refrigerator is cold and dry, which is easy to evaporate the moisture in the beans, resulting in the loss of fragrance; in addition, there are too many miscellaneous smells in the refrigerator, so it is more appropriate to use vacuum boxes to preserve coffee beans, isolate other groceries in the refrigerator and keep water loss at the same time. If you don't use vacuum cans, it's still not appropriate to put them in the refrigerator.

At the same time, since the condensed water naturally formed from low temperature to room temperature will also damp the coffee beans, so don't let the coffee beans get wet before putting them in the refrigerator. Once the coffee beans are taken out to thaw, do not freeze the coffee beans again, because during the thawing process, the coffee beans will absorb water, and the condensed water will accelerate the loss of the flavor and taste of the coffee beans.

Preservation in greenhouse

Microorganisms and oxidation are carried out at a moderate rate at room temperature, and freshly roasted coffee beans can be kept for two weeks at room temperature. The change in the taste of coffee in the past two weeks is worth pondering.

Just baked the first day, its taste is not very mature, you will smell the grass. On the other hand, the charming sweetness of coffee beans is not strong enough, and you will feel that its taste is "stuffy". In the next few days, the smell of grass will slowly decrease, while the sweet smell will slowly rise. The sweet smell reached its peak on about the third day, and then slowly faded.

On the whole, the personality of the coffee bean will be obvious and active in the first few days, and its personality will become docile after about a week. Some people insist on tasting the personality of coffee a few days ago, while others like to taste the gentle side of coffee beans at room temperature for a week. If you can finish your coffee beans within two weeks of baking, it is recommended that you keep them at room temperature so that the same bag of beans can feel its variety. Feel its changes every day, not only add some color to life, but also increase experience is very helpful to judge the freshness of coffee beans.

Vertical tank is recommended.

The carbon dioxide released by fresh coffee beans will be stored at the bottom of the container to form an antioxidant layer to protect the coffee beans; and the container is best placed upright to prevent the loss of carbon dioxide in the jar or bag. Thus it can be seen that upright, tall and open containers are more suitable for preserving coffee beans.

It is recommended to use separate vacuum tanks

This kind of vacuum tank will be equipped with a mechanism that can pump out the air in the tank to form a vacuum. Absolute vacuum means that there is no oxygen or water vapor, so it is a great place to store coffee beans.

Coffee has a strong adsorption capacity for peculiar smell, especially fine coffee is more sensitive. Peculiar smell not only refers to stinky smell, rotten smell, etc. For coffee, the smell of tea, milk, etc., is also peculiar, so coffee must be kept separately and cannot be placed in the same sealed jar with other items, including different varieties of coffee beans.

Finally, I would like to add a few small Tip ↓↓↓↓ preserved by coffee beans.

1. When coffee beans are stored at room temperature, they need to avoid strong light, reduce the contact surface with oxygen, and avoid high temperature and humidity.

2. Reduce your exposure to oxygen in any case, unless you want it to oxidize naturally.

3. The low temperature in the refrigerator can restrain the oxidation of coffee beans, at the same time, we should pay attention to the use of vacuum boxes to isolate the miscellaneous smell of other foods, and to keep moisture from being lost. Before using refrigerated coffee beans, unfreeze them one day in advance. Don't let the coffee beans get wet before putting them in the refrigerator. Once the coffee beans are taken out and thawed, do not freeze the coffee beans.