What's the difference between a coffee grinder and a flat knife-which is better than a hand coffee grinder

What's the difference between a coffee grinder and a flat knife-which is better than a hand coffee grinder

The bean chopper not only can not evenly treat coffee beans into coffee powder, but also the heat generated in this process aggravates the rapid loss of oxidation flavor of coffee beans.

The first principle of fine coffee extraction: uniform extraction. The coffee powder of the chopping machine is coarse and fine, which leads to excessive or insufficient extraction of coffee, excessive scorching and bitter taste, and insufficient sour and astringent hemp.

What are the types of bean grinders?

According to the coffee extraction method, it is divided into: single coffee grinder and Italian coffee grinder.

According to the structure of the grinding plate can be divided into ghost teeth, flat knife, cone knife.

According to the mode of work, it can be divided into manual manpower and electric power.

My personal advice is to buy the best bean grinder that you can afford!

Effect of powder structure on coffee flavor. This is just the extraction process. The core of the extraction process is the higher extraction rate at the high water temperature and the higher extraction rate at the fine point of grinding. So what is the effect of powder structure on extraction? It's nothing but a water block! Cone knife powder under the microscope, the main body of the powder structure will have many protruding outer fulcrum, just like a hedgehog. After a lot of powder particles gather, it is impossible to match them completely because of the external fulcrum. 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. Ghost tooth powder, ghost tooth grinding out of the powder waist slender, relatively smooth, 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. Flat knife grinding powder, than conical knife protruding fulcrum is less, particles into blocks, waist than ghost teeth to be stout. Personally, I think the water resistance of flat knife powder should be the greatest! Ghost tooth powder waist is too thin, peace knife powder compared to the resistance must be less. Then the powder ground by the flat knife, from the structural point of view, the convex fulcrum of the powder particles is less, so the coupling is much better than the cone knife powder. The gap is tighter than the cone knife, the water resistance is larger, and the extraction is more.