The thickness of the coffee powder is very important for pouring coffee. Hand-brewed coffee is essentially "filter coffee", that is, the coffee liquid obtained by pouring coffee powder with hot water, and then filtering it with filter paper. The thickness of the coffee beans directly determines the extraction time of the coffee.
The grinding degree of coffee beans directly affects the extraction time and extraction rate of coffee.
The coarser the coffee powder
The coarser the ground coffee, the larger the gaps between the layers of ground coffee, the faster the hot water flows through, and the less time it takes to brew the coffee.
The potential risk of this is that the extraction rate of the coffee will be reduced, which will easily lead to insufficient extraction of the coffee, so that less flavor of the coffee will be extracted. The lighter the flavor, the more sour the coffee will be.
The lower the grounds are ground, the smaller the gaps between the layers of coffee grounds, the slower the hot water will flow through, and the longer it will take to brew the coffee. The potential risk of this is that the extraction rate of coffee will increase, which can easily lead to over-extraction of coffee, so that too much flavor of the coffee will be extracted, and the stronger the flavor, the more bitter the flavor will appear.
The effect of fine powder on hand brewed coffee
When making pour-over coffee, fines play a very important role. Everyone must have encountered this situation when making hand-brewed coffee: too much fine powder, when hot water is poured into the filter cup, the water in the filter cup drops very slowly, and even clogs. This is why there are too many fines. No matter what grinder you use, fines cannot be avoided unless you sieve the coffee after grinding to remove the fines. In coffee extraction, fine powder contributes considerably to the body of the coffee. This is because the fine powder is extracted very quickly by the hot water. But not too much, too much will cause the coffee flavor to become extremely bitter, and it will also cause the filter holes of the filter cup to be blocked.
The difference between manual and electric
No matter which brand of coffee grinder is used, the generation of fine powder cannot be avoided. A high-quality grinder will only reduce the proportion of coffee fines. The hand-cranked bean grinder has a higher proportion of fine powder due to the frequency of the hand-cranked bean grinder; the electric bean grinder has a longer cutter head, the frequency of grinding will be faster, and the heat will be smaller, so the grinding The proportion of fine coffee powder will be less.
There is a saying in the coffee industry: a good grinder has a greater impact on the flavor of coffee than a good coffee machine. When making hand brew, the thickness of coffee powder has a decisive influence on the concentration of coffee (determining the strength of coffee flavor) and the extraction rate of coffee (determining how much coffee flavor). Too coarse ground coffee will make the coffee taste bland, and too fine ground coffee will make the coffee taste extremely bitter.
A good cup of coffee is made up of most of the coarse powder and a small part of the fine powder. Grits provide the coffee's premium flavor (acidity and sweetness) and aroma, while fines add body to the coffee. Therefore, the existence of fine powder is necessary,