What is the scale of the coffee grinder?-how to adjust the scale of the Italian bean grinder

What is the scale of the coffee grinder?-how to adjust the scale of the Italian bean grinder

The thickness can control the bitterness

Roughness is a good way to control bitterness, because the finer the grinding, the higher the extraction rate, the easier it is to extract high molecular weight bitter substances such as chlorogenic acid, quinic acid, caffeine and carbides. On the contrary, if the grinding is too rough, the lower the extraction rate is, the more difficult it is to extract the astringent bitter substance with high molecular weight, but the sweet taste with middle molecular weight may remain in the coffee grounds because of insufficient extraction, which is a waste.

The scale is not immutable

Do not use the same grinding scale when playing coffee. If you know that the density and baking degree of each bean is different, the required scale will not be the same. The scale of very hard beans or shallow roasting can be adjusted slightly finer, and that of deep roasting can be adjusted thicker. If you think a bean tastes bitter and salty on scale # 3, this is excessive extraction, which can be adjusted to # 3.5 or # 4, which will significantly improve the bad taste spectrum, and vice versa.

In addition, the bean grinder should be diligent in maintenance, regularly remove the knife head and remove the grease dirt inside. The knife head is consumable, and it will be dull every 800 to 1000 pounds. Remember to replace it, otherwise the grinding particles will be half-thick, which will cause uneven extraction and damage the good flavor of coffee.

The scale is just a reference, different brands have different grinding scales, and the performance of the same model bean grinder of the same brand under the same scale is not exactly the same. it is better to understand it this way: the scale just 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.