How much water do I need to inject into hand-brewed coffee? What is the right proportion of powdered coffee and water?

The feeling of making coffee by hand is very ceremonial, and it is also true in reality. The exact number of grams of coffee, the precise temperature of the water, and even the amount of water injected should not be careless! (the tea party next door withdrew from the group chat)

Why should we pay so much attention to water injection?

Hand coffee is extracted in the form of drip filtration, and we continue to inject water into the coffee powder, and the water passes through the coffee powder to take the substance from the coffee powder into the next pot, that is to say, the more water we pour, the more coffee there is in the coffee liquid.

But coffee is not like tea, it can be brewed repeatedly, and the more coffee, the better. SCA, the most authoritative coffee organization, said that about 30% of the substances in coffee are soluble in water, while 18-22% of the substances in the range are considered delicious by the public, and beyond this range there is a good chance that the coffee will become untasty.

In addition to the fact that the more coffee substances, the better, we also need to know the dissolving efficiency of hand-made coffee. A careful friend may find that the coffee liquid dripping is darker at first and lighter later. This means that the extraction efficiency of hot water will gradually decrease at the beginning. So pay attention to the amount of water injection is also to control the concentration of coffee, the less water, the higher the concentration of coffee, the more water, the lower the concentration of coffee.

How much water does it take to make coffee?

In order to take into account the reasonable coordination of the concentration of the coffee liquid and the extracted flavor substances, the amount of water injected is particularly important, so how much water needs to be injected before the coffee tastes good.

Take hand coffee as an example, the amount of water injected depends on the ratio of coffee powder to water. Qianjie products are used to use 15g coffee powder, and the ratio of powder to water at 1:15, that is, the amount of water injected is 225ml water. Qianjie conducted several experiments of brewing light roasted coffee and found that the concentration at 1:15 was about 1.35-1.42%, and the corresponding extraction rate was 17.79% Mel 18.73%. This is a very suitable range for drinking.

So how much water do you need to inject 20g and 25g coffee powder? We still follow the method of fixed powder-to-water ratio, for example, 20g coffee powder needs to be injected with 300ml water, and 25g coffee powder needs to be injected with 375ml water.

So does too much or less water have a great effect on coffee?

The 1:15 powder-water ratio recommended in Qianjie is not absolute, nor does it mean that the coffee made from the powder-water ratio beyond 1:15 is not good. Strong lovers like the powder-to-water ratio at 1:10, and there are some cafes that use powder-to-water ratio until 1:16 to cater to the tastes of the public.

Of course, the powder-to-water ratio needs to cooperate with other factors of coffee brewing in order to show a good taste. Among the brewing parameters in the former street, the powder-to-water ratio between 1:15 and 1:16 can show a good flavor of the coffee. This interval is called a reasonable parameter. If less water is injected than 1:15, it will not cause the coffee to be rich and uncoordinated, but more water than 1:16 will make the coffee as light as water.