The best time to enjoy coffee? How long is the coffee expiration date? Can I still drink coffee after it has been kept for a long time?

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Coffee is a decreasing substance, which is constantly "reduced" during roasting and reorganized to exhaust after baking.

Coffee beans oxidize with time and contact with the air, and the flavor and quality also deteriorate slowly. The volatile oil locked in the coffee fiber tissue will produce the smell of oil rot due to oxidation.

The "best taste period" of coffee beans is according to the depth of roasting, from one week to one month after exhaust, the coffee quality will decline curvilinear after that, we recommend a maximum storage period of 2 months or 2 weeks after opening (stored in a sealed jar / one-way breathable valve sealed bag).

We found that the freshly baked ripe beans have the so-called "dryness", which mainly shows that the sour taste is more sharp, not round enough, the sweet feeling has not reached a better state, and some slightly astringent feelings hover in the mouth. The baking process is a complex chemical and physical reaction process, as well as variables that we do not understand. But dryness is a real taste.

From our five-year experience of specialized farming and roasting, the taste period of coffee beans is 30-60 days, as long as they are kept airtight. The problem of accelerated aging is not involved until after opening it. SCAA has done experiments on the preservation of coffee beans. Relatively speaking, the aging rate of the Kraft paper bag is faster, and the aging rate of the aluminum foil bag installed in the one-way exhaust valve is slow. So be extra careful with the storage of coffee beans after each use.

Is there an absolute "best taste period"?

Many mentors are skeptical about the "best taste period". Because although the baking degree of each bean can be relatively stable, there is still an error of positive and negative degrees, even if the previous curve is strictly followed, which involves factors such as space environment. Needless to say, the direct result is that you don't know that the days when you think they are delicious are what beans should be. Moreover, each person's sense of smell and taste are very different, and these variables may make the "best taste period" of coffee suspect that a deer is a horse.

Psychological anxiety caused by flavor period

Consumers have repeatedly wrestled with this problem, one is that they do not understand coffee roasting, and the other is that they do not trust baristas and roasters.

So although some boutique coffee service providers have turned to using scientific and proven methods to convince consumers with little success.

In this case, it is necessary to expose the facts again and again, constantly communicate with consumers about taste and flavor changes, and improve the overall image of a product in communication. To achieve what science cannot do.