About the freshness of coffee beans coffee beans are preserved coffee beans are too fresh how to adjust grinding

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A cup of coffee with strong flavor can relieve your physical and mental exhaustion, while fresh coffee beans can ensure the unique flavor and rich layering of coffee. Coffee lovers all know that only freshly roasted coffee beans can make a cup of coffee with strong flavor, so it is very important to choose fresh coffee beans.

The freshness of coffee is critical to the quality of coffee. If coffee beans are placed for too long after roasting, it will lead to the loss of coffee taste and aroma, and the natural quality will decline. Qianjie Coffee comes from straight beans with great emphasis on the freshness of coffee beans, and high-quality coffee beans are mainly freshness. Because coffee beans basically have no flavor more than 50 days after baking, we will remind guests that the taste period of coffee beans is less than 30 days, and the best taste period is within 14 days after the bean cultivation period. Every bag of beans sold on Qianjie Coffee ensures that every enthusiast can drink the freshest beans within the best taste period.

To buy freshly roasted coffee beans, it is best to choose beans baked on the same day. The freshness of coffee beans is irreplaceable. But how can we tell whether the coffee is fresh?

Freshness of coffee beans

Coffee beans are full of luster

Bring out some oil, which will then wrap around the entire coffee bean, making the surface shiny. The longer the coffee beans are placed, the glossiness will be particularly dim.

The aroma of coffee beans is rich.

Fresh coffee beans smell particularly rich and rich, so if the coffee you buy already smells tasteless, it shows that it has been kept for a long time after baking and may even have gone bad!

Outgassing test

Compared with the previous methods, this method of outgassing test of coffee beans is more scientific. Put the coffee beans in a plastic bag, drain the gas, seal it, and leave it overnight to see if the bag bulges the next day. If it is freshly roasted coffee beans, it will constantly release carbon dioxide to make the bag bulge.

How to preserve coffee beans

After buying good coffee beans, you should put them in a place that is not exposed to sunlight and low temperature and humidity, because it is not easy to dry the baked beans, it is easy to absorb the smell along with the moisture. In addition, do not store in a wet warehouse, and the temperature should be at room temperature. If you store in a hot and humid place, you should pay attention to ventilation.

Coffee beans should be stored in a dry and cool place. Do not put them in the fresh-keeping box of the refrigerator to avoid absorbing moisture. Put them in the freezer. Refrigeration is the ultimate means of keeping coffee beans fresh. When refrigerating, remember to put them in the freezer after sealing them. When you take them out of the freezer, you need to avoid the frozen part from melting and damp the coffee beans in the bag. It should be noted that the container full of fresh coffee beans is sealed (it is best to use it up within 1 month after opening), and keep it in a cool place with sunlight and temperature, and pay attention to the shelf life, so that there will be no problem at all.

The coffee beans should be as close to the top of the sealed jar as possible, and should be closed as soon as possible after each opening, so as to reduce the chance of meeting the beans with air. In addition, the outer packaging of the coffee beans can be fastened with a rubber band and then put into the sealed can. or the coffee beans can be divided into small packages of about one dose and then put into the jar, and if there is a desiccant, you can also put a packet in the jar to ensure that the jar is dry. Due to the small air contact, coffee beans are more durable in quality and flavor than ground coffee powder. therefore, in order to maintain the aroma of coffee, try to grind coffee beans when you need to brew coffee. For roasted coffee beans, the biggest changes in quality are "light", "temperature", "humidity" and "air", so it is necessary to control the time of contact with the air, lower the temperature, maintain a low humidity, and place it in a place where there is no light. or store it in a sealed container.

As the flavor of coffee is very unstable, it is easily affected by light, temperature, humidity, oxygen and other factors. Roasted coffee is exposed to the air for a long time and is prone to fat oxidation, which is an important cause of coffee deterioration. Roasted coffee contains about 10-15% fat, 75% triglyceride, and 50% linoleic acid. At the same time, linoleic acid can be automatically oxidized to hexanal, and the longer it is exposed to the air, hexanal will be oxidized into volatile substances, resulting in bad quality, resulting in the decline of the taste of coffee.

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