What are the characteristics of flat knife, ghost tooth and cone knife? Introduction of various types of bean grinders
Coffee brewing seems simple, but it is a very complex process, from bean selection, bean grinding, to brewing parameters, from coffee bean resume, bean grinder style, to brewing utensils, etc., influence each other and the ring is important! The freshly ground coffee powder can smell the aroma and see the freshness. Have a cup when you are drowsy, and the spirit will come in an instant! However, the coffee powder begins to oxidize quietly from the moment it is ground and comes into contact with the air, and the flavor and aroma will change accordingly, so the ideal situation is to grind the beans before cooking to ensure that the best flavor can be tasted. Bean grinder can be said to be a low-key but extremely important role in hand-brewing coffee cooking, and it is also one of the absolute indicators that affect the final flavor of coffee!

Introduction of common cutter head of bean grinder
The reason why the bean grinder is important is that, in addition to the freshest coffee powder, the thickness of the coffee powder is also an important factor affecting the taste and extraction degree, and all kinds of bean grinders on the market have their own characteristics. different cutterhead structures also have their own thickness suitable for grinding, and the choice will be based on demand (personal, household, business, etc.), price, quality, cooking methods, personal preferences and so on. There is no absolute difference between good and bad:
Flat knife
Powder shape: flaky, oblong rectangle
Features: coffee beans are ground by flattening, and the appearance of coffee powder is mostly flaky.
Flavor: mellow and single, passionate and unrestrained
Advantages: suitable for fine grinding, because the coffee powder is meticulous, the extraction area is large, so the coffee concentration can be increased in a short time, and a variety of flavors can be extracted, and the aroma is the most intense.
Disadvantages: more fine powder, uneven size of coffee powder, if the extraction time is too long, it is easy to bring bitterness, astringency and miscellaneous flavor due to excessive extraction.
Ghost tooth
Coffee powder shape: spherical
Flavor: clean, bright, full and balanced
Advantages: it is a cutter head with high grinding efficiency, the size of the ground coffee powder is average and the flavor is clean.
Disadvantages: the flavor is too clean and lack of hierarchical change
Conical knife
Coffee powder shape: granular
Features: coffee beans are ground by rolling, the cutter head is tapered, and the appearance of coffee powder is close to granule.
Flavor: round and smooth, hierarchical stacking
Advantages: it is suitable for rough grinding, with more uniform particles and less fine powder, and the extraction area is smaller because the coffee powder is coarse, so the coffee concentration is balanced and it is not easy to over-extract, which greatly improves the level change of fine coffee.
Disadvantages: granular coffee powder needs to be extracted for a long time
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