How Does Coffee Degassing And Why?

Taking pour-over coffee as an example, when hot water is added for steaming, a large amount of carbon dioxide will be released, resulting in the feeling that the coffee beans are 'breathing', and many people judge whether a cup of pour-over coffee is "fresh enough" Standard; Espresso's crema is also carbon dioxide covered by fine foam, so when fresh enough coffee beans are brewed, there will be a beautiful layer of crema. When you drink Espresso, you can watch the store brew it. How fresh the coffee is, the dark red, ochre red crema means the coffee is still very fresh, while the golden yellow is beautiful but not so fresh.

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The fresher the coffee, the higher the carbon dioxide content, but if you need to go to the coffee shop to replenish the stock every two or three days, it may not be practical and troublesome. Coffee beans are very expensive products and are easily affected by humidity, oxygen, light sources, or the influence of heat. The best way to preserve them is in a cool and dry place.

It would be great if the air could only get out and not in!

Yes, the one-way exhaust valve achieves this effect. The coffee bean bag/can with the one-way exhaust valve will allow the carbon dioxide released by the coffee beans to sink, and then the lighter oxygen and nitrogen will be squeezed out of the bag/can. Just like a cut apple will turn yellow when it encounters oxygen, coffee beans will also begin to change quality when it encounters oxygen. In order to prevent these qualitative changes, it is the correct choice to use a package with a one-way ventilation valve, and coffee hunters are shipped. It is the packaging that uses the one-way ventilation valve!

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Many food packaging is filled with nitrogen, which can prevent the food from contact with oxygen and extend the shelf life; coffee beans can also be used. The coffee beans sold at Illy will use nitrogen-filled packaging to extend the shelf life of coffee beans.

The roasting degree is divided into light, medium, medium-dark, dark, etc. There will be different processing methods according to the plantation estate and country of coffee beans, and these all depend on professional roasters and experience. There are also different methods for fire, semi-direct fire or hot air, and the topic of roasting beans is too large, and the discussion may take up the entire space, and I will introduce it later.

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When some coffee players started learning, they thought that the coffee beans roasted yesterday could get the freshest flavor by brewing and drinking immediately today, so they found that the taste was not as good as expected when brewing and even doubted whether there was a problem with their own technology, I didn't find it was getting better after trying for two weeks, but the batch of coffee beans also bottomed out. This means that there is no time to degas the coffee beans, but it is impossible to brew the best state. This is a lot of novices. Little mistakes will be made, but have not experienced mistakes, try how to know what the better flavor is?

Coffee beans are like living human beings. With oxygen inhalation, cells are oxidized, which is also a process of aging. The coffee that has just been roasted is still too immature and has not reached the most mature stage. Just like people, it grows over time. It will create a more mature you. All you need is to give the coffee beans some time.

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Find out why this happens? Because the flavor composition of roasted coffee beans has been roughly determined, many people attribute the reason for the deterioration of coffee beans to the fact that coffee beans change every day. Still, as mentioned earlier, everything will deteriorate slightly after oxidation. Affecting the taste, there may not be such a fine taste sensation on apples, but coffee will obviously feel the change in taste. The coffee beans that have just been roasted will release a large amount of aroma factors and carbon dioxide, which are released through small holes in the coffee beans that have been roasted. Due to the contact between the powder and the water, the flavor extraction is insufficient, and as time goes back, the carbon dioxide gas layer becomes thinner. The contact area increases and the coffee becomes more and more flavorful. Therefore, many people do not call degassing as degassing. Gas, but a process of deflation and exhaust.

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You will have a question: Then if I put all the carbon dioxide in it, it will disappear, won't it be very fragrant?

Don't forget that the aroma factor is constantly lost over time, and the coffee you brewed at that time may only have a bitter taste, and you have already let go of the sweetness and sourness. It is the store's suggestion that degassing is a better choice. In addition, it is also recommended that during the degassing process, the coffee beans below can be shaken so that the coffee beans below can also be ventilated above.

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As soon as the coffee beans are roasted, he begins to count down his taste period. After the degassing period, there are about two weeks of drinking time, just like the coffee hunter service is calculated in two weeks. During the best tasting period, it may cause the coffee beans to be oily, which is normal. Still, it is also a small warning sign, that is, the flavor of the coffee beans is going to decline rapidly, reminding you that you need to finish brewing quickly before Don't waste delicious coffee beans!

There is no specific timetable for degassing, and it can only be based on experience or the advice given by the roaster.

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The recommended degassing time is 14 days for very light roasting, ten days for light roasting, seven days for medium roasting, 4 to 5 days for medium-dark roasting. Because on hand-made single product coffee, the coffee can be woken up when it is steamed. If it is Espresso beans, the degassing time is generally 21 days, but the coffee beans used for business do not have so much time to grow, so It will accelerate degassing when exposed to air so that the coffee beans can reach the smooth stage.

Degassing is a necessary process. There is a lot of knowledge about coffee beans. It is not easy to drink a good cup of coffee. You can brew a cup at home by grasping the degassing after roasting, purchasing equipment, and, most importantly, grinding beans. Good coffee. I hope you like this article. If you want to buy coffee beans, we coffee hunters provide different coffee beans every two weeks. Go to the official website homepage to learn more!

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