Introduction to the shape of coffee filter cup | what are the types and characteristics of hand-made coffee filter cup?

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First of all, there are many different types of coffee filter cups used in filter paper dripping type, including 1 hole, 3 holes, and 1 large hole. Using different types of coffee filter cups, the speed of filtration is different, so it may eventually bring different coffee taste.

Filter cup shape

Brewing coffee is essentially a control of chemical changes. When we make a cup of coffee, we encourage the soluble matter to be moved from the coffee powder to the water to form a coffee liquid.

"the state of the fluid flowing through the porous media (coffee powder) is easily affected by the shape of the container (filter). The container will affect the mass transfer of the fluid. In other words, it will affect the amount of extraction. "

"if you have a flat-bottomed filter, the water will hit it in the middle, spread radially, and then flow out of one or more holes in the middle. If you have a semi-conical filter, the water will flow down vertically from the middle injection point without much radial diffusion.

The coffee in the flat bottom filter and the conical filter has a different flavor, which is caused by the different ways in which water flows through the coffee powder bed. However, the flow of water can be changed by changing the cooking technique, thus changing the final extraction flavor of a certain shape filter.

Types and characteristics

If the coffee liquid is filtered quickly, the water will flow out quickly, and the extraction time will be short. On the contrary, if it is filtered slowly, the coffee liquid will stay in the filter cup (the remaining coffee liquid is called "retention liquid"), making the extraction time longer. Because the extraction time is different, the taste of coffee is also different.

Therefore, the difference in the size of the filter cup hole becomes the key to affect the speed of filtration. Filter cup with small hole (1 hole), the speed of filtration is slow. Using this kind of filter cup, it will not drain immediately after pouring hot water, but will be retained to a certain extent, so that the quality of the brewed coffee is more stable and is not easily affected by the way of pouring water.

If the pore area is large (3 holes or 1 large hole), the filtration speed will be faster, and the way of pouring water will have a great impact on the taste of coffee. This type of coffee filter cup is not easy to produce "retention liquid". With the pouring of water, extraction and filtration will occur at the same time, and the extraction takes place around the position where the water is poured.

In other words, the coffee brewed out of a small filter cup may be more assured-but it may take a little longer. But in order to taste a good cup of coffee, it's worth it! I hope that after remembering these, you can be more confident to choose the filter cup that suits your heart.

The speed of filtration changes because of the area of the hole on the filter cup, the smaller the area, the slower the filtration speed, this type of filter cup because the injected hot water will first stay in the filter cup, and then filter at a certain speed, extraction occurs in stagnant hot water, so the injection mode of hot water will not be affected, and can make relatively stable coffee.

The larger the pore area, such as a three-hole filter cup and a large-hole filter cup, the faster the filtration speed will also affect the way of injecting hot water. Hot water injection into these filter cups will not stagnate. Generally, the injection position is in the center, while the extraction is filtered at the same time. If you constantly change the position of hot water injection, the flavor of coffee will be easier to extract, but if the injection position remains unchanged, it may lead to uneven extraction. The flavor is not complete.

When selecting the filter cup, we should pay attention to the material of the filter cup. If it is a ceramic filter cup, the shape of each will be different. If the groove on the inside of the filter cup is too shallow, the hot water is not easy to pass through, which will cause excessive extraction.

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