Is the coffee grinder electric or manual?

The most important index of coffee grinding is the speed and uniformity of grinding. The so-called uniformity is a relative index. At present, there is no absolutely uniform grinder, so the so-called uniformity refers to the thickness of most ground coffee. Of course, the uniformity of professional coffee grinder is better. But if you don't want to spend so much money and just want to grind coffee with a hand mill or a small pulverizer, then the adjusted grinding fineness is only a reference value, that is, most of the powder should be at this fineness. Therefore, friends who use a manual bean grinder should observe the thickness of coffee powder after grinding coffee. It sounds a bit troublesome to judge the fineness of most coffee powder as your grinding thickness, but a grinder like a hand mill can only do so.

It is a fact that the coffee ground by a small electric bean grinder (such as a small pulverizer) is uneven. Therefore, it is suggested that when grinding beans, you should shake them up and down like drawing lots in the temple. The goal is to make the coffee beans rotate as evenly as possible, but this is just as much as possible. But the biggest advantage of this machine is that it can grind quickly and keep the aroma as much as possible. However, the grinding speed of hand mill is slow, and the aroma will evaporate a lot. If we must compare the advantages and disadvantages of these two bean shops, we can only say that radish and cabbage have their own love. The difference is not too big.

The degree of grinding is closely related to the extraction time, which directly affects the taste. For example, the coffee ground by hand mill or small pulverizer has a large proportion of roughness, so if you want to get a mellow taste, you must increase the soaking time. On the contrary, if the proportion of fine coffee is large, and you want to pursue bright fruit acid and low bitter coffee, then you must shorten the soaking time.

For the same kind of coffee beans, under the same water temperature and water quantity, the fine ground coffee has higher mellowness and brighter acidity.