Espresso extraction: what is coffee extraction for 8 seconds? can coffee powder be extracted twice?

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"Time" is the last part of the Espresso extraction strategy, usually calculated in "seconds". When the pump starts and the pump stops, the time consumed is the "extraction time".

Time is the least important variable in any Espresso extraction strategy, but it can not only make a perfect Espresso, but also destroy the beauty of Espresso. If you use 20g of powder and extract 50g of espresso in only 10 seconds, your Espresso is almost impossible to taste good. In the extraction, the "time" factor must be taken into account in order to extract a cup of Espresso with both sweet and complex flavor.

At present, most coffee shops limit the extraction time to 22-40 seconds, or rather, 25-32 seconds, when extracting Espresso.

Generally speaking, rapid extraction of Espresso will have thinner Body and higher acidity; slightly slower extraction will bring more mellow Body and more sweetness to Espresso. If the extraction time is too short, Espresso will have a thin taste, weak flavor and sharp acid; if the extraction time is too long, Espresso will bring unpleasant bitterness and miscellaneous taste. The above is not a golden rule, but it is applicable to most of the extraction processes of Espresso.

"time" is far less important than "extraction quantity", which means that the whole extraction process should be based on the premise of obtaining the set extraction quantity, and on the premise of reaching the extraction amount, it is hoped that the time is just within the ideal range.

We assume that the ideal extraction strategy is as follows: 20g powder, 40g extraction quantity and 30 seconds extraction time.

In this strategy, 20g of powder is fixed, 40g of extraction is unshakable, and only time can be changed, because time is not as important as the other two. The extraction time of Espresso is a very strange thing, it does not affect the whole body as much as the amount of powder and extraction.

Once the amount of powder and extraction are both determined, adjusting the extraction time will be the last chance to change the extraction flavor, while adjusting the grinding degree can enhance or weaken the "concentration and extraction rate" at the same time.

Generally speaking, the fine grinding will enhance the extraction rate and concentration at the same time. The process of grinding more finely increases the extraction rate by increasing the extraction area of coffee and slowing down the flow rate of concentrated liquid.

The effect of changing the degree of grinding on Espresso is much smaller than directly changing the amount of extraction, but it is equally important. If it is well utilized, it will greatly improve the Espresso. "adjusting extraction quantity" can be regarded as "coarse adjustment", while "adjusting grinding degree" is "fine adjustment".

Imagine a situation where it takes 25 seconds to extract 50g of Espresso with a fixed amount of powder of 20g. Everything looks perfect, but when you taste it, body is thin and acerbic. Obviously, the extraction of this Espresso is insufficient and the concentration is low. In this case, there is no way to change the insufficient extraction by adjusting the amount of extraction. more extraction will cause a thinner taste, while less extraction will make it more acidic. At this time, grinding the coffee beans finer can solve the problems of insufficient extraction and low concentration, at the same time, it can reduce the acidity and increase the alcohol thickness.

With the knowledge and experience of coffee, it is impossible to brew coffee for the second time. The psychology holds the expectation, really or not! So good! Cook it for the second time!

As soon as it goes into the throat. The sense of expectation and excitement I just held.. All that's left is "little by little". In addition to the faint aroma, the extremely strong bitter taste drowned out the faint smell of coffee.. It was followed by a dry mouth, dry throat and a whole discomfort..

Just now, the pleasure of good coffee.. It disappeared in an instant. Olympian GOD~

A good cup of coffee not only tastes good, but also brings comfort and relaxation to the drinker, and even leaves with a sense of happiness. This is not easy to achieve, nor can it be erased.

Coffee-never brew it a second time. It's not a way to save money, or think coffee is good and brew-resistant.