Ghost tooth grinding bean what is ghost tooth grinding machine which brand is good

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Bean grinders can be divided into three categories: flat knife, conical knife and ghost teeth.

Cone knife: the coffee bean is ground into particles by grinding, so its shape is mainly block.

Flat knife: coffee beans are ground into particles by cutting, so its shape is mainly flaky.

Ghost teeth: coffee beans are ground into particles in the way of grinding, so their shape is mainly close to circle.

In fact, the same beans, in three different knife types of bean grinders, the grinding degree is basically the same, the taste of coffee entrance is different. Although the main flavor is the same, but the details of the structure is very different! Why?

First, uniformity, the powder produced by the three types of knife is not uniform! So there is no absolutely uniform bean grinder. The uniformity of your eyes is fundamentally different from the actual uniformity!

Second, the structure of the powdered particles is completely different after grinding, such as conical knife, ghost tooth and flat knife. Through grinding, it can be observed that the powder structure and shape of different knife shapes are completely different.

Third, the effect of powder structure on the flavor of coffee. This is just the extraction process. The core of the extraction process is the high extraction rate at the high water temperature and the high extraction rate at the fine point of grinding. So what is the effect of powder structure on extraction? It's a water block!

Cone knife powder structure of the main body will be more like a diamond, just like a hedgehog. The gap will be larger and the flow of water will pass faster. The flow of water passes faster, so the extraction is relatively low.

Advantages: the cone knife grinding particles will be close to granules, resulting in longer water absorption path of coffee particles and longer internal contact with water, so the cone knife particles will release less soluble matter at the initial stage, resulting in a low concentration in a short period of time.

Disadvantages: because the shape is granular, even if extracted for a long time, the xylem absorbs less water and is less likely to produce miscellaneous and astringent taste.

Flat knife grinding out of the powder, into a block, I think the flat knife powder should be the largest water resistance! Then the powder made by the flat knife is much better than the cone knife powder in terms of structure. The gap is tighter than the cone knife, the water resistance is also larger, and the extraction is also a little more.

Advantages: however, the coffee particles ground by the flat knife are flaky, and the flake can increase the area of the cell wall, so using the flat knife can increase the concentration and extraction rate of coffee liquid in a short time, so that the aroma of coffee can be significantly improved in a short time.

Disadvantages: at the same time, because the shape is long, the volume is smaller, when the extraction time is longer, the particle xylem will absorb too much water, making miscellaneous flavor and astringent taste increased.

The powder of ghost teeth will be round and smooth, and the coupling between powder and powder will be better. The gap is also small, the flow of water through will be relatively slow, and the extraction will be relatively more. From the taste, the same beans, the same amount of powder, the same water temperature, the same fineness of powder, ghost teeth will have better sweetness.

Ghost tooth advantages: ghost tooth grinding plate can grind more uniform coffee powder, at the same time produce less fine powder, higher grinding efficiency. The particles of coffee powder ground by ghost teeth are close to round, and the ratio of coarse powder to fine powder is more uniform, so the coffee taste is cleaner, the flavor is more three-dimensional and full.

The disadvantage of ghost teeth: the price is higher.