Grinding degree and extraction time of coffee-introduction of different brewing methods for different coffees

There are different brands and types of bean grinders for grinding coffee, and the ideal one is a grinder that can adjust the thickness of the beans. Do not use machete grinder, machete grinder easy to cause uneven thickness. In this way, the coarse powder is not enough to extract the fine powder has been over-extracted. It is conceivable that the coffee brewed in this way must be bitter and astringent, with mixed flavors.

When grinding with a bean grinder, do not grind too much at one time, just enough powder for one time, because the longer the bean grinder is used at one time, the easier it is to heat up, 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 steamed coffee. Fresh coffee beans are emerald green and must be roasted and cooked, then ground into powder, and then brewed to become the coffee sold by the store. in terms of actual cooking, the time required for ESPRESSO machine to make coffee is very short, so the coffee powder is the finest, and the coffee powder is as fine as flour; it takes about 1 to 3 minutes to siphon the coffee, and the coffee powder belongs to medium-thick grinding. The fineness of American coffee maker and hand bleb is generally the fineness of sugar. The proper grinding degree of coffee powder 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 steamed for a long time, resulting in excessive extraction, the coffee may be very bitter and lose its aroma. On the other hand, if the powder is very coarse and cooked too fast, resulting in insufficient extraction, then the coffee will be insipid, because the best time to dissolve the water-soluble substances in the powder and grind the coffee is before it is cooked. Because ground coffee is easy to oxidize and lose its flavor, especially without proper storage, coffee powder is also easy to change flavor, so it is naturally impossible to brew mellow coffee. Some people are afraid of trouble or do not want to buy a bean grinder. They usually buy ready-made coffee powder when they drink coffee at home. At this time, they should pay special attention to the problem of storage. After opening the coffee powder, it is best not to place it at room temperature at will. The more appropriate way is to put it in a sealed jar. Because the coffee powder is easy to absorb, an accidentally becomes a strange taste of coffee, then no matter how good the quality of coffee is ruined. However, some people put the steamed coffee powder in the refrigerator as deodorant after sun-drying or microwave drying, which is a good way to make the best use of things.

When grinding beans, the size of the powder depends on the way it is cooked. Generally speaking, the shorter the cooking time is, the finer the grinding powder is; the longer the cooking time is, the thicker the grinding powder is.