1, "Iblik" copper pot
When the water is "boiled", it is put into the "coffee powder". When it is boiled, it is "picked up from the fire" and poured into the cup. Most of the coffee residue is left in the pot. The longer the pot body, the longer the distance from the spout to the other end of the pot body, so the higher the coffee pot, the better. But coffee powder always leaks out, the coffee in the pot is empty, and a pile of coffee grounds at the bottom of the pot is also troublesome. Most coffee can sink to the bottom of the pot, but as long as the coffee pot is unstable, it will easily flow out of the spout, and the final product will be thick and turbid.
2. Mocha pot
Only italian coffee machine can make espresso. If every rule is strictly observed, mocha pots can make quite excellent coffee. However, it is generally easy to cause excessive coffee extraction and bitter taste. Its successor is siphon coffee pot, and the next generation is pneumatic coffee machine. Some mocha pots improve the excessive astringency and boring flavor of extraction by adding a load valve. If the pressure does not reach the set standard, water cannot penetrate upward through the valve.
3, pressure pot
Its usage is similar to other coffee pots, but there is an extra filter plug that can push the filter downward. Coffee liquid can penetrate through the filter screen, and all insoluble fine coffee powder is slowly squeezed to the bottom of the pot. The French press kettle is a complete soaking method for brewing coffee. Its beauty lies in that it retains the mellow feeling of coffee in large quantities and is easy to control. The disadvantage of the autoclave is always that the coffee is not clean enough and the acidity is not as good as that of the filter paper brewing method.
4, filter cloth brewing method
If properly handled, the filter cloth brewing method can make quite good coffee, and its taste is not inferior to that of the autoclave, but its service life is limited. Flavor coffee oil can penetrate into the cup through the filter cloth, which is a great advantage of the filter cloth compared with the filter paper. The disadvantage of filter cloth is that it is easily blocked by fine coffee powder, so it is difficult to clean and maintain. Once the filter cloth is blocked, trouble comes. It is difficult for coffee to filter out of the blocked filter cloth, and even the whole filtering process is completely cut off if the situation is more serious.
5. Siphon pot
Siphon kettle and pneumatic kettle are composed of two layers of containers connected vertically or horizontally, and the pipeline connecting the containers is provided with a filtering device (usually filter cloth) at the tail end. The first layer container is supported on a heat source and filled with water; The second container contains coffee powder. The steam pressure in the first layer container increases with the water temperature, pushing the water into the second layer through the pipeline and mixing with the coffee powder. As soon as the heat source is cut off, the steam pressure in the first container drops, and the brewed coffee is pulled back to isolate the coffee powder.