Coffee bean rough grinding suitable for brewing utensils: (), flannel dripping filter pot.
Coffee bean rough grinding suitable for brewing utensils: (), flannel dripping filter pot.
Each extraction apparatus has its own appropriate degree of grinding, so grinding is not the degree of grinding you want. As I just said, when extracting coffee with filter paper trickling filtration, the coffee powder is too coarse or too fine, which means that the most suitable grinding degree is medium to medium roughness.
Is ultra-thick grinding better? This is also a matter of degree. If the grinding is too rough, the hot water will easily fall through the filter paper, and the delicious ingredients of the coffee will not be fully extracted. In this way, the coffee that falls into the coffee pot will become a mild liquid.
In the process of grinding and extraction, there is an unchanging basic rule, that is, "the finer the grinding degree, the heavier the bitterness, and the thicker the grinding degree, the weaker the bitterness." This is based on the fact that the surface area of coffee powder is covered by hot water. From this, we can know the relationship between the extraction apparatus and the grinding degree of coffee powder.
Espresso coffee, for example, grinds deeply roasted beans and uses an espresso machine to extract a small amount of coffee liquid in a short period of time, resulting in coffee with a strong bitter taste: what about the same coffee powder extracted by filter paper trickling filtration? The result of the actual operation is that the filter paper will be blocked by coffee powder, which makes it difficult for the injected hot water to pass through, the extraction time is prolonged, and finally evolves into the case of excessive extraction.
The effect of fine powder is worse than friction heat, which not only makes the coffee liquid turbid, but also produces bitterness and astringency. The most disgusting thing is that the fine powder with high temperature and static electricity will attach directly to the inside of the bean grinder and mix it into the new coffee during the next grinding. Therefore, the cleaning of the bean grinder is very important.
(4) the degree of grinding suitable for extraction method is selected.
Each kind of extraction apparatus has its own suitable grinding degree. The following is the relationship between the grinding degree of coffee powder and the extraction method.
* suitable for fineness grinding-Turkish copper pot (Ibrik), mocha pot, espresso machine (very fine grinding).
* suitable for medium grinding-filter paper dripping method, flannel dripping method, plug air kettle.
* suitable for roughness grinding-drip coffee machine (extreme roughness grinding), trickling filter pot (extreme roughness grinding)
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