Common grinding thickness of coffee powder-thickness of hand-made coffee powder
Common grinding thickness of coffee powder-thickness of hand-made coffee powder
This is the biggest variable, because our body is not an instrument, the strength of pressing powder is based on the feel, there is no feel for the novice, only powerful and small, even for the veteran on the bar, the first or second cup every day is to find the feeling of strength, because we may directly affect the exertion of strength because of our physical state and even mood on that day.
But it is also this point, I think it can increase the stability most. When you use the same kind of beans, find the scale, determine the amount of powder, and use a force that you think is more comfortable to press the powder, if you can make a decent cup of esp, you will basically be done. The reason why it is said that the powder pressing strength adjustment can increase stability, because the scale and powder loading, as well as the beans themselves will have a certain small error due to the environment. In most cases, this error can be improved by the weight of pressing powder to achieve a stable extraction effect.
The change of humidity is also one of the factors affecting the degree of grinding. When the humidity is relatively high, the wet speed of the ground coffee powder is very fast, and there is already a slight humidity when filling the powder and cloth powder. If a fine grinding degree is used, the coffee flavor components have already reacted with the air with high humidity and become messy and impure, while the coffee powder is easier to be compacted and the extraction process is longer, which makes it easier to extract the bad taste and make the overall coffee taste muddy. Therefore, in the case of relatively high humidity, it is not suitable for a finer degree of grinding, it will be better to use a slightly thicker degree of grinding.
On the other hand, when the humidity is relatively low, when the coffee powder is ground and comes into contact with the air, the rate of oxidation reaction will be accelerated. If the coarse grinding degree is used, the coffee powder oxidation and the change of flavor composition will make the extracted coffee taste less.
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