Professional hand coffee grinding fineness requirements-introduction to entry-level coffee tutorial video

Professional Hand Brewed Coffee Grind Requirements-Beginner Coffee Tutorial Video Introduction

1. The grinding degree suitable for brewing method should be selected;

2. The temperature generated during grinding should be low;

3. The powder after grinding should be uniform;

4. Grind before brewing.

No matter what kind of grinding machine is used, it will certainly generate heat by friction during operation. Most of the fine substances are highly volatile, and the heat of grinding will increase the speed of volatilization, and the aroma will be lost in the air. After coffee beans are ground, the cell wall will completely disintegrate, the area in contact with air will increase a lot, the oxidation and deterioration speed will become faster, and coffee will lose flavor within 30 seconds to 2 minutes. Therefore, it is recommended not to buy coffee powder, it is best to buy coffee beans, grind before drinking, grind well should be brewed quickly. Before the invention of the bean grinder, humans ground coffee beans using stone pestles and bowls. A doctor once experimented with this ancient tool and compared it with modern bean grinders. It is said that the coffee powder ground by pestle and stone bowl can make the best flavor.

When grinding the beans, the thickness of the powder depends on how it is cooked. The shorter the cooking time, the finer the ground powder; the longer the cooking time, the coarser the ground powder. In terms of actual cooking, ESPRESSO machines take a very short time to make coffee, so the ground coffee powder is the finest, and the coffee powder is as fine as flour; it takes about one minute to cook coffee in the "plug wind" way, and the coffee powder is medium in size; American filtered coffee takes a long time to make, so the coffee powder is the coarsest, one by one like the Beijing grain on the shell beach. Grinding coffee powder of appropriate thickness is very important for making a good cup of coffee, because the extraction of water-soluble substances in coffee powder has its ideal time, if the powder is very fine, and cooked for a long time, resulting in excessive extraction, coffee may be very bitter and lose aroma; on the other hand, if the powder is very coarse and cooked too fast, resulting in insufficient extraction, then coffee will be tasteless, because there is no time to dissolve the water-soluble substances in the powder.

Coffee grinders come in a variety of brands and models, but ideally one that can adjust the size of the ground beans. When grinding with a bean grinder, do not grind too much at a time, enough powder for one use is good, because the longer the bean grinder is used, the easier it is to generate heat, which indirectly causes the coffee beans to be heated in the grinding process and causes the aroma to be released in advance, which will affect the aroma of the cooked coffee.

Coffee beans contain oil Lu, so the grinder must be cleaned after grinding, otherwise the oil deposits, there will be stale smell for a long time, even if it is more advanced beans, but also ground into strange smell powder. After each use of the bean grinder, be sure to wipe the blade machine with wet market and clean the plastic top cover with warm water. But for flavored coffee popular in the United States, the added flavor is strong and heavy, and it will last a long time. It is best to put two spoonfuls of white sugar into it before washing. Of course, it is best to grind only the same kind of beans in a grinder, so there is no problem of mixing flavors.