Freshly roasted coffee beans should be kept for a few days. How long is the coffee tasting period? do not exceed this period.

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Qianjie-brief introduction of coffee cultivation and appreciation period

Coffee beans are like living personnel. people oxidize cells with oxygen inhalation, which is also a process of aging. Freshly roasted coffee is too young to reach the most mature stage, just like human beings. It takes years to grow up to make you more mature. What you need is to give the coffee beans some time. To put it bluntly, bean cultivation is the process of "gas release", which is also commonly known as awakening, raising beans or ripening.

About 2% of the weight of coffee beans that have just been roasted by fire is carbon dioxide, and this large amount of carbon dioxide emits carbon dioxide with the storage environment, equipment, or method, making the pressure in the package higher than an atmospheric pressure. the pressure contributes to the fusion of aromatic substances and oils, making all the aromatic substances inside the coffee beans easy to extract. The common one-way exhaust valve for coffee bean bags on the market is to discharge excess carbon dioxide so as to prevent the bean bag from being broken by carbon dioxide.

What does this have to do with packing? This important question requires a glimpse into the mysteries of the cell wall structure in coffee beans. The cell walls in coffee beans are only about 5 microns thick, but they can withstand the pressure of 140psi (pounds per square inch), which mainly comes from carbon dioxide produced during the second half of the baking process. Finally, a few days after the baking cycle, the so-called gas release process begins, and carbon dioxide begins to dissipate from the coffee beans.

The complete exhaust process of coffee beans must be much longer than that of coffee powder after grinding, and the exhaust phenomenon of coffee beans will also shorten the life of coffee beans. In the early exhaust process, the air will replace the escaped carbon dioxide with a proportion of about 1:1, and the air contains about 21% oxygen, so the air absorption will quickly oxidize the coffee, the coffee will continue to exhaust, and the pressure inside the coffee beans will low. the rate of exhaust will begin to slow down. Over time, 12-ounce bags of baked beans release more than half a cubic foot of carbon dioxide.

There is a period of best taste of coffee after roasting, which is called flavor period or appreciation period. The reason is that freshly roasted coffee has a self-fermentation process within a week, which makes the flavor more perfect. After this stage, it begins to oxidize and volatilize, and the beautiful coffee flavor begins to lose gradually. Therefore, the best taste period for coffee is usually within two weeks after roasting. During these two weeks, the coffee will have a very fresh aroma and rich oil, the coffee with sweetness has obvious sweet return, and the coffee powder has obviously expanded after being infiltrated by hot water. This is often a simple way to identify whether it is freshly roasted. Of course, different degrees of roasted coffee taste period will be different, therefore, boutique coffee will be marked on the packaging of different flavor period or taste period.

The correct drinking period of fresh coffee

When we buy a type of coffee, especially high-quality coffee ripe beans, we must pay attention to the flavor period of coffee. The flavor period of roasted coffee beans can be tasted within 1 month, and the longest sealed and preserved is no more than 2 months. However, after the coffee is ground into powder, the surface area increases, which accelerates oxidation and volatilization, so the flavor period is shorter, so the coffee must be roasted within two weeks in order to drink the real flavor. After the flavor period, the coffee you drink may only have a bitter taste or abnormal flavor (such as added flavor), so the premise of good coffee must be fresh.

If you are a curry powder, it is recommended that you buy roasted coffee beans, grind as much as you can, prolong the oxidation time of coffee as much as possible, and ensure the wonderful flavor of coffee. If you are a functional demander of coffee, if you buy hanging-ear coffee for convenience, don't ignore the flavor period, you only need to buy one for half a month at most.

Knowledge point: the way to reduce exhaust is to increase the time of growing beans, so that the oxidation reaction of coffee beans becomes smooth, and the flavor will become more balanced.

In short: Qianjie is a coffee research hall, happy to share the knowledge about coffee with you, we share unreservedly just to make more friends fall in love with coffee, and there will be three low-discount coffee activities every month. The reason is that Qianjie wants to make more friends drink the best coffee at the lowest price, which has been Qianjie's tenet for 6 years!

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