How fine is the grinding degree of the hand punch? How does the grindness of the hand affect the flavor of the coffee?

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Qianjie Coffee Today talk about how fine the coffee powder needs to be ground to achieve the perfect extraction?

Grinding beans is the first step of handmade coffee, but it is also a step that many people are easy to fail. It is either too fine or too thick, which indirectly affects the taste of the cooked coffee powder. If you want to accurately grasp the size of the coffee powder, you can use a small flying eagle or Pegasus bean grinder, which can adjust the scale of the coffee powder and accurately grind the ideal fineness.

Take the grinding degree of Pegasus bean grinder as a reference

The best thickness of hand coffee powder is between Italian coffee (No. 1 ~ 2) and French filter kettle (No. 5 ~ 6), that is, the granularity is about No. 4, and the smaller the number is, the finer the powder is.

If you use a traditional hand grinder, the granularity of hand-brewed coffee is half the size of brown sugar, but the disadvantage of manual grinder is that it is easy to have uneven thickness. So how will the rough grinding and fine grinding of coffee affect the flavor of coffee?

The coffee powder that is too fine will be over-extracted, and it is easy to extract the coffee impurities, while the coffee powder that is too coarse will be underextracted and the taste will be light.