Under the same gram, the finer the grinding degree-increasing the cutting times-increasing the surface area-increasing the contact area between water and coffee powder-the finer the grinding degree-the finer the coffee powder is cut into particles-the shorter the distance from the surface of coffee powder particles to the center of coffee powder particles-the shorter the time for water to reach the inside of coffee powder particles for extraction-the easier it is to extract coffee flavor substances.
On the contrary, the coarser the grinding degree-the lower the concentration and extraction rate of coffee-the lower the mellowness-the stronger the acidity of coffee.
① Fine powder is easy to be over-extracted.
② Too coarse powder is easy to be under-extracted.
Then, grinding fineness is one of the important factors affecting extraction. Master the most complete grinding degree and suitable brewing equipment, and brew a good cup of coffee together! What if you have a coffee machine but you can't make espresso as good as a coffee shop? Share in the next issue how to adjust the grinding degree for italian coffee machine)
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