研磨粗細與萃取 Grind Size and Extraction
研磨粗細 -沖煮咖啡時，研磨程度越細，溶出物質的速度越快。
Grind Size - The finer the grind, the faster the material will dissolve when brewing coffee.
因此，在同樣萃取量之下，咖啡粉顆粒越細，與水接觸的時間相對就要越短(水柱相對大)；反之研磨越粗，與水接觸時間要越長，才可增加萃取率；依照研磨狀況調整，才不易造成萃取過度或不足的狀況。
Therefore, under the same amount of extraction, the finer the coffee powder particles, the shorter the contact time with water (the water column is relatively larger); on the contrary, the coarser the grind, the longer the contact time with water to increase the extraction rate; Adjust according to the grinding conditions, so that it is not easy to cause over-extraction or under-extraction.
│延伸閱讀：手沖咖啡黃金比例
│Futher reading：Perfect Pour-Over Coffee Golden Ratio
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