How does the thickness of coffee powder affect the taste-grinding thickness map
How does the thickness of coffee powder affect the taste-grinding thickness map
Under normal circumstances, the fineness of coffee is inversely proportional to the extraction time and the extraction rate. It can be proved from hand brewing and espresso that the coarser the powder is, the smaller the extraction resistance is, the greater the flow rate is, the shorter the extraction time is, the lower the extraction rate is, and the lighter the taste is.
On the contrary, the finer the powder is ground, the greater the extraction resistance is, the smaller the flow rate is, and the longer the extraction time is, the higher the extraction rate is and the stronger the flavor is.
However, professional baristas will go against the trend and try to shorten the extraction time slightly when they encounter finer coffee powder, so as to avoid making bitter coffee with too high extraction rate. On the contrary, if you encounter coarser coffee powder, you will try to prolong the extraction time slightly, so as to avoid insufficient extraction and make insipid coffee.
French filter kettle (rough grinding), electric drip pot (medium), hand punch, siphon pot, desktop smart filter cup (medium), mocha pot (medium), espresso (fine), Turkish coffee (very fine).
According to the European Fine Coffee Association (SCAE-Speciality Coffee Association of Europe), the rough grinding of the French filter pot indicates that each bean is crushed into 100,300 particles, each about 0.7mm in diameter. In the medium rough grinding of the electric filter pot, each bean is ground into 500 grains of 800 particles, with a diameter of about 0.5 mm. Moderately ground by hand and siphon, each bean is ground into 1000 to 3000 particles with a diameter of about 0.35. The fine grinding of espresso in which each bean is ground into 3500 particles with a diameter of about 0.05mm. Turkish coffee is ground into a flour-like ultra-fine powder, and each bean is ground into 15000mm 35000 particles.
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