How to adjust the thickness of manual coffee bean grinder-which one is better?

How to adjust the thickness of manual coffee bean grinder-which one is better?

The oil substances in coffee are extremely sensitive to changes in the external environment and are very easy to deteriorate. Roasted coffee beans contain a wide variety of aromas and flavors beneath their appearance. Once the internal structure of coffee beans is damaged, the essential elements in the coffee beans will come into direct contact with the oxygen in the air and oxidize, thus the coffee powder will deteriorate. According to statistics, coffee will lose 60% of its aromatic substances in the grinding process. In addition, the water in the air will directly react with some oils in coffee, thus affecting the sufficient degree of oil dissolution in the extraction process. Not only that, grinding coffee powder in advance will release excessive carbon dioxide in the coffee, resulting in the loss of a lot of essential taste, and the coffee will become insipid and tasteless. So before learning how to grind coffee, keep in mind that you can only buy freshly roasted prepared coffee beans.

The grinding thickness of coffee beans will also affect the taste. Under the premise of consistent objective conditions, generally speaking, the more fine the grinding is, the more bitter the coffee will be, and relatively, it will cover up other rich flavors of coffee. The thicker the grinding, the more sour it will be. Too sour will make coffee difficult to taste, so when you want to show a unique flavor of coffee, you can also use micro-survey grinding to achieve the effect. But this adjustment should be a moderate fine-tuning on the basis of the corresponding grinding degree of the instrument.

First, adjust the grinding degree of the coffee machine: generally speaking, there is a rotating button in the bean warehouse of the automatic coffee machine, and there is a scale on the knob. This knob is to adjust the grinding degree of coffee beans. Generally speaking, it is to adjust the thickness of coffee powder. The larger the scale value is, the thicker the coffee powder will be, on the contrary, the finer the coffee powder will be. We can adjust the coffee concentration by adjusting the grinding degree of coffee beans. The finer the coffee is, the higher the concentration is, the thicker the coffee powder is, and the lower the coffee concentration is.

Second, adjust the amount of coffee powder: the automatic coffee machine has the function of adjusting the amount of coffee powder. The adjustment of the amount of powder does not necessarily adjust the concentration of coffee. If you increase the amount of coffee powder within a certain range, the concentration of coffee will increase. If you go beyond this range, the concentration of coffee will not rise, just like we have two cups of the same amount of water. We added one spoonful of sugar and two spoonfuls of sugar respectively to the two cups of water. If the water is saturated with one spoonful of sugar, then adding two spoonfuls of sugar cannot improve the sweetness of the water. The same is true for adding and reducing powder.