Coffee technical explanation of grinding beans, pressing powder and loading powder

1. Powder thickness-how much should the bean grinder scale be adjusted to?

The scale is only a reference, different brands have different grinding scales, and the same model of bean grinder of the same brand does not perform exactly the same under the same scale. It is better to understand it this way: the scale only tells you which direction is thick and which is fine. When you find a suitable powder thickness, the role of the scale will show a little bit. The premise is that only your bean grinder, and can not change the beans, the amount of powder does not change, the strength of the powder can not be changed.

Remember a little trick: when you find the right powder thickness, twist it with your hand from time to time, pinch it, feel it with your body and write it down as much as possible, so that even if you change the bean grinder, you don't have to rely solely on the scale to judge. If you pinch it with your hand, it will be significantly thicker, which can greatly improve your efficiency.

two。 Powder load-how many grams of powder are used to make a single and double portion?

I can tell you how many grams of powder I use, but that's for my beans, my grinder, my powder thickness, my powder strength, these links are closely linked and can have a direct impact, when you change one of them, the rest have to be changed. In principle, we install more coarse powder and less fine powder, of course, you can fix what you think is the ideal amount of powder, because the powder quantity and scale are relatively controllable (compared with numerical values, the scale is as little as possible, and the amount of powder is a few grams).

3. Powder pressing strength

This is the biggest variable, because our body is not an instrument, the strength of pressing powder is based on the feel, there is no feel for the novice, only powerful and small, even for the veteran on the bar, the first or second cup every day is to find the feeling of strength, because we may directly affect the exertion of strength because of our physical state and even mood on that day.

But it is also this point, I think it can increase the stability most. When you use the same kind of beans, find the scale, determine the amount of powder, and use a force that you think is more comfortable to press the powder, if you can make a decent cup of esp, you will basically be done. The reason why it is said that the powder pressing strength adjustment can increase stability, because the scale and powder loading, as well as the beans themselves will have a certain small error due to the environment. In most cases, this error can be improved by the weight of pressing powder to achieve a stable extraction effect.

4. The influence of beans-why does changing beans become different? Is it bad for beans?

The overall composition and density of different varieties of beans in different producing areas are different, and different baking degrees will also cause differences in hardness, resulting in changes in grinding speed and particle size, so that before the bean powder thickness scale, powder quantity, powder pressing strength appears to be a little weak, just like you can't put your wife's shoes on your feet. Therefore, many foreign restaurants will use a fixed bean grinder for fixed beans in order to ensure the stability of their grinding effect as far as possible.

So in the case of fixed beans, first set the amount of powder, and then find the powder thickness, and then use a more stable strength to find the feel, the efficiency should be the highest.

The secret of grinding coffee beans

The grinding tool for coffee beans is a bean grinder. Bean grinders can be divided into three types:

● family uses manual rotary bean grinder. It is suitable for leisure people with small demand, large particles and killing time.)

● household electric bean grinder. It can grind coffee powder of all kinds of particle size, and it can grind out 6 people at a time.)

● specializes in using electric bean grinder. (for commercial use, coffee powder of more than one pound or less can be ground at a time.)

The following two points should be paid most attention to when grinding coffee beans:

● reduces the heat of rubbing. (grinding heat will cause the aroma of coffee to dissipate early)

The size of ● particles is uniform. (uneven particle size will make it impossible to control the brewing time.)

So if you use a family-style manual bean grinder, you should rotate gently so that it does not produce friction heat as much as possible. To sum up, if you consider the quality, quantity, time and convenience of grinding beans, the use of electric bean grinders for home use will be the best choice.

Generally speaking, a good grinding method should include the following four basic principles:

1. The degree of grinding suitable for brewing and cooking should be selected.

2. The temperature of cattle produced during grinding should be low.

3. The powder particles after grinding should be uniform.

4. Grind before cooking.