Fine Coffee Science on the Grinding of Coffee beans

The task of grinding roasted coffee beans into powder is called crushing, and the props for grinding coffee beans are called grinders. It is said that Beethoven counts sixty coffee beans in the grinder every morning, grinds and then brews the coffee, grinds the coffee, enjoys its fragrance, and then excitedly experiences the fun.

According to its size, the grinding methods of coffee beans can be divided into three types: rough grinding, medium grinding and fine grinding. Use the appropriate grinding method according to the coffee utensils.

There is also medium fine grinding or very fine grinding (powdered coffee powder) which is finer than fine grinding. The timing of grinding coffee beans is before brewing coffee, only the need for grinding is the top grade. After the coffee bean is ground into powder, its surface area increases and absorbs moisture, which is easy to oxidize. In short, with the passage of time, coffee powder also plays a role of deterioration to damage the flavor. And after the ground coffee beans are placed, the carbon dioxide retained inside the beans will be lost together with the aroma. In this way, when the coffee powder is extracted and filtered, the coffee powder should be expanded without expansion, and you can't make delicious coffee anyway. The secret is to consider grinding and homework consistently, so brewing coffee is the most delicious and mellow.

◎ fine grinding (fine particles, the same size as sugar)

Grinding in ◎ (particles the same size as a mixture of granulated sugar and coarse white sugar)

◎ rough grinding (coarse particles, the same size as coarse sugar)

The knack of grinding coffee beans

The grinding prop for coffee beans is a grinder. There are numerous types of mills ranging from manual at home to large electric ones for business. Household grinders can also be used as decorations, and the number of people need more than one grinding, or electric to facilitate.

According to the structure of the grinder, there are grinders that use vertical and horizontal groove blades to cut coffee beans and those that grind coffee with molars. Each has its own advantages, and the situation of business use tends to mass production of the electric type as the mainstream.

However, the following two points should be paid most attention to when grinding coffee beans:

The friction heat of ① is suppressed to a minimum. (the aroma will fly away because of the fever)

Whether the size of ② particles is uniform or not. (if the particles are uneven, the concentration will be uneven.)

Taking this as a consideration, if you are a household mill, you should rotate it gently and take care to avoid friction heat as much as possible. Therefore, it is more appropriate to use electric grinders.

How to use the mill

Grind the beans before brewing.

There are two types of household mills: manual and electric. The manual type is used if the number is small, while the electric type is more convenient for the large number of people.

Determine the grinding method (particle size) with the bubbling apparatus.

Manual grinders should be careful not to produce friction heat only. And pay attention to whether it is mixed with other things.

Whether the granules of ground coffee beans are large and neat or not should be checked. (in the case of uneven particles, it is possible that the function of the grinder is always, or coffee roasting is not symmetrical, etc.)