The guide for the selection of the filter cup, the shape and structure of the filter cup, what does the rib filter material represent respectively

Nowadays, there are a wide variety of filter cups on the market, a variety of strange appearance shapes, and different advantages described by sellers, all of which make the rookies who are newly addicted to coffee somewhat confused. V60, Kono, origami, melittta and so on, is it the more expensive the better? Which material is better, ceramic, silica gel, resin or metal? Is it possible to brew better coffee with a certain kind of filter cup? In the face of these difficult and complicated diseases, it is better to teach people to fish than to teach people to fish! Qianjie will bring an interpretation of the structure of the filter cup, and we will understand this instrument from the root of the filter cup.

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Influence of shape and structure of filter cup

Each filter cup has a unique appearance, the cup body has a cone-shaped, fan-shaped, flower basket and other differences, the cup wall has different curves, different number of ribs, or even none; different number of filter holes at the bottom of the filter cup vary in size, these differences greatly increase beginners' choice difficulties.

And all the shapes, ribs and filters point to one factor-the flow rate. Flow rate refers to the length of time that coffee stays in the filter cup during brewing. Too short time will make coffee easy to underextract and taste thin and tasteless; too long time will easily lead to excessive extraction, bitterness and negative taste. With the same amount of powder, grinding, water injection and other conditions, only with different flow rates, you will get coffee with different flavor characteristics.

But we should know that it is not only the filter cup that can change the flow rate, but also the flow rate can be adjusted through our cooking methods. According to different cooking methods, you can make the filter cup with fast flow rate slower and the filter cup with slow flow rate faster.

Material influence of filter cup

After talking about the appearance and shape of the filter cup, then it is the second feature "material". On the basis of the appearance of each filter cup, they distinguish between different materials such as gum, glass, ceramics, metal and so on, which will eventually lead to the core-temperature control.

Here will be divided into two professional terms "thermal conductivity" and "specific heat capacity". "Thermal conductivity" means the rate at which heat is transmitted. When a filter cup comes into contact with hot water, the speed of its spread is the high and low thermal conductivity. The mother questioned that the thermal conductivity of metal and ceramic must be the highest. When the filter cup comes into contact with hot water, it quickly spreads all over the body and makes people call it hot. On the other hand, the resin and rubber are just the opposite, and it takes a while to reflect the temperature.

"specific heat capacity" refers to the heat capacity (heat preservation) of an object. The higher the specific heat rate is, the higher the ability of heat absorption and heat dissipation is, and vice versa. The specific heat rate of plastics and resins is relatively high, and their ability to absorb and emit heat is relatively strong. if we need to change the filter cup temperature of these materials, we need to let them spend more time in contact with high temperatures for storage; metal and ceramics are opposites, although they conduct heat very fast, but they can not be stored for a long time.

So when we first enter the stage, we first understand the basic knowledge of the filter cup, and then choose the right filter cup. Resins and plastics are more suitable for long-time cooking, because they can keep the temperature for a long time, while metal and ceramic ones are more suitable for short-term cooking. The rapid spread of temperature allows coffee powder to be fully extracted at a time. Proper temperature cooling so that it will not over-point to stop. There is no perfect filter cup, there is no perfect method, but we can use the corresponding method to match the right filter cup to produce a perfect cup of coffee.

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