What is the effect of the thickness of hand-brewed coffee powder on coffee extraction?

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Generally speaking, the way coffee is brewed is to determine the particle size of the coffee powder. When you use a machine that takes less time to brew, the coffee powder must expand more surface area to come into contact with water, and the finer the particles are needed; on the contrary, when the brewing time is longer, the grinding particles must be bigger and rougher. To put it simply, the longer the extraction time, the thicker the coffee beans will be ground, so as not to cause excessive extraction and let the bitter taste of the coffee run out; the shorter the extraction time, the finer the coffee beans will be ground, so as to avoid insufficient extraction.

Mastering the roughness and fineness of coffee beans is also important for coffee, which directly affects the extraction effect (golden cup principle), that is, the flavor of coffee.

At the same brewing time: the finer the coffee powder, the stronger the coffee taste; the thicker the coffee powder, the lighter the taste. The longer the extraction time, the thicker the beans will be ground, so as to avoid excessive extraction and bitterness. The shorter the extraction time, the finer the beans will be ground to avoid insufficient extraction.

In terms of taste, if you think the coffee you drink is often bitter, you might want to try it a little thicker.

In terms of the roasting degree of coffee beans, shallow roasted beans can be refined to increase richness, while deep roasted beans can be thickened to avoid over-extraction.

Fineness grinding: flour black sugar powder

Medium grinding: fine sugar

Roughness grinding: coarse sugar

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Then list the suitable grinding of the equipment.

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1. Italian machine: fineness / medium fineness

two。 Mocha pot: medium / medium

3. Siphon pot / hand punch: medium / medium thick

4. Filter pressure: medium / coarse

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As a matter of fact, there are no certain criteria for the thickness, which is related to the baking degree / coffee bean species. It is just a list for your reference.