How to make coffee with cake filter cup? Introduction to the characteristics of using flat-bottomed filter cup to make coffee by hand

Uniform extraction is very important for hand-brewing coffee. No matter in terms of utensils or techniques, we will try our best to make the coffee powder extracted evenly. In the front street, when talking about why conical filter cups are mostly used now, one of the reasons is for better uniform water injection and uniform extraction.

And the flat-bottomed filter cup, which appears slightly later than the tapered filter cup, also claims to make the coffee extract evenly, so what is its effect?

The earliest flat-bottomed filter cup was Kalita,Kalita, the appliance company that carried forward the fan-shaped filter cup. After the popularity of V60, it must be necessary to launch a more competitive filter cup. In 2010, Kalita launched the Wave series, in which the filter cup is this flat-bottomed round filter cup, which is also known as the cake filter cup because the special filter paper used is very similar to the shape of the cupcake. (however, in terms of the unity of the name and appearance of the Wave series, it should be more for the cloud series of competitors.) in any case, the Kalita Wave filter cup opened the first flat-bottomed filter cup, followed by B, Blue bottle and other brands to launch their own flat-bottomed filter cup.

In front of the street, let's talk about how filter cups help coffee powder extract evenly. In terms of extraction uniformity, Qianjie first reiterated that at present, there is no way to ensure that every coffee powder can be extracted to the same substance, so the extraction uniformity here is not absolutely uniform, but more of a comparative relationship. For example, the V60 filter cup mentioned in the previous article in Qianjie is compared with the fan-shaped filter cup, the angle of view is fixed on the top, and the mouth of the filter cup is designed into a circle, so that it is easier to achieve uniform water injection, and it is more difficult to achieve uniform water supply in contrast. The extraction of the tapered filter cup will be more uniform.

On the other hand, the flat-bottomed filter cup also retains a circular opening, and the uniform layer of water injection is as good as the cone. The advantage lies in the thickness of the powder layer. We move the viewing angle to the front and side, and the tapered filter cup slowly expands the surface area of the upward point because the bottom is a point, which makes the thickness of the powder layer thicker under the premise of the same amount of powder, and the thickness of each point is inconsistent, the center point is the thickest and the outer ring is the thinnest. In this way, there may be a big gap in the extraction rate of coffee powder between the upper layer and the lower layer. Flat-bottomed filter cup because of the flat bottom, under the premise of the same amount of powder, the thickness of the powder layer is relatively thin, and the thickness of the powder layer is basically similar. In this way, under uniform water injection, the extraction between powder layers is relatively uniform.

So under normal circumstances, the coffee extracted from the cone-shaped filter cup headed by V60 is rich in aroma, highlighting sweet and sour fruit notes, as well as a sense of hierarchy. The flat-bottomed filter cup pays attention to the balanced taste and highlights the sweet feeling. Of course, although the same flat-bottomed filter cup, but the difference in design for the final flavor of coffee performance is still different. The front street is explained from the bottom of the filter cup and the rib design of the cup body. The design of the bottom of the flat-bottomed filter cup is generally divided into a sewer hole and a "paper support frame". The sewer hole of the flat-bottomed filter cup is in the form of multiple small holes. Whether launching is fast or not mainly depends on the reasonable distribution of these holes and the total area, and the total area of the opening is large. Natural fast launching, such as the recent bottom hollowed-out design of the flat-bottomed filter cup, is essentially a large area of sewer holes.

In addition to the launching hole, there are some raised skeletons at the bottom to prop up the filter paper at the bottom. if the bottom is smooth and the filter paper is fully combined with the bottom of the filter cup, then it is difficult for the water to drop. On the contrary, the filter paper is not completely fitted. In order to maintain a comfortable launching speed.

The rib design of the cup body is divided into two kinds, one is to lock water, the other is to dredge. For example, the horizontally distributed ring ribs of the Wave filter cup, one of which is to slow down the falling speed of the water flow, and the other is to keep the water level horizontal. The ring-shaped structure allows the water in the high position to walk along the ring line to the lower position on the other side, reflecting a uniform effect.

The other is the vertical ribs similar to the tapered filter cup, which play the role of guiding and dredging the water flow, and it is not easy to block and deposit in the process of extraction.

However, the role of the ribs of the flat-bottomed filter cup is not as significant as that of the conical filter cup. Qianjie said in the article on the degree of fit of the filter paper that only the part of the filter paper attached to the filter cup will reflect the role of the rib, while the cake filter paper used in the flat-bottomed filter cup, only the part that creases outward is affixed to the filter cup, and that is the only part that really reflects the role of the ribs.

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