Comparison of Grinding degree of hand-brewed Coffee compared with Italian Coffee selection of suitable Grinding Machine scale

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First, the correlation between the degree of grinding and cooking machines and tools:

The factors that affect the flavor of coffee are not only the origin, but also the different brewing utensils, the temperature of hot water, the contact mode of hot water and brewing time. And so on are all influencing factors. And different cooking utensils also determine the thickness of bean grinding, different thickness more affect the flavor of brewing. Generally speaking, the grinding thickness of coffee beans can be divided into four types:

1. Very fine grinding: also known as "concentrated coffee grinding", "Italian grinding".

Particle size: like white granulated sugar

Suitable for brewing machines: Italian espresso machine, Turkish Epico pot.

two。 Fine grinding:

Particle size: between white sugar and fine sugar

Suitable for brewing machines: filter pot, filter paper dripping method and American coffee machine

3. China Grinding:

Particle size: between fine sugar and coarse sugar

Suitable for brewing machines and tools: siphon (air stopper), flannel filter bag

4. Rough grinding:

Particle size: like coarse sugar

Suitable for brewing machines: filter pressure pot, light drop filter pot, water drop coffee machine

The grinding standard of Qianjie coffee is as follows:

Thin > thick

80% pass rate of hand race > 75-80% pass rate of American trickling filter > 70-75% pass rate of cup test > 65-70% pass rate of French pressure.

Second, the degree of grinding and the change of coffee flavor:

Compared with the ground coffee beans, the oxidation rate of the ground coffee powder increases with the increase of the surface area of the contact air, the preservation time of the coffee decreases, and the flavor changes with the temperature. During brewing, coffee will also be dialyzed and extracted according to the degree of grinding, and the temperature and mode of brewing water with different degrees of grinding will also affect the flavor of coffee. Therefore, the basic law summarized is that the finer the degree of grinding, the stronger the bitterness; on the contrary, the coarser the degree of grinding, the lighter the bitterness.

The number on the engraving plate of the bean grinder represents the grinding coefficient. The smaller the number is, the finer the ground coffee powder is, and the larger the number is, the thicker the ground coffee powder is. Different coffee beans and coffee utensils should also use different thickness. Although each item has a rough grinding range, but there is no absolute value, players can find out the most suitable grinding degree through testing. Generally speaking, the roughness and fineness of coffee bean grinding can be divided into rough grinding, medium grinding and fine grinding. The coffee machine and brewing method are also different.