Fine Coffee talk about the Grinding of Coffee

Coffee beans, the dark brown beans seem ordinary, but they have a lot of knowledge at all stages. For a coffee cook and drinker like me, coffee beans are grown, produced and roasted. I think it is enough to have a general understanding of professional knowledge, and coffee merchants can be responsible for the production. After all, this is an era of paying attention to the division of labor. But it is the responsibility of our users to grind and make coffee, and we must have a clear understanding.

The ideal time to grind coffee is to grind it before cooking. 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 cook mellow coffee. Some people are afraid of trouble or do not want to buy a bean grinder, so 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. If the climate is humid, it is best not to place the coffee powder at room temperature after opening it. A more appropriate way is to put it in a sealed jar and refrigerate it in the refrigerator, and do not put it in the same place with garlic, fish and shrimp and other foods with heavy flavor. Because the coffee powder is easy to absorb, a careless coffee becomes a strange taste coffee, then even the best quality coffee will be spoiled. However, some people put the cooked coffee powder in the refrigerator as a deodorant, 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, the finer the ground powder; the longer the cooking time, the thicker the ground powder. Sixth, in terms of the actual way of cooking, it takes a very short time for the ESPRESSO machine to make coffee, so the grinding is the finest, and the coffee powder is as fine as flour; it takes more than a minute to cook coffee in the "plug wind" way, and the coffee powder belongs to medium-sized grinding; American filter coffee takes a long time to make, so the coffee powder is the thickest, one by one like Beijing grains on a shell beach. Grinding coffee powder with the right 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, the coffee may be very bitter and lose its aroma. On the other hand, if the powder is coarse and cooked too fast, resulting in insufficient extraction, the coffee will be tasteless because it is too late to dissolve the water-soluble substance in the powder.

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. 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 get hot, 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, so the bean grinder must be cleaned after grinding, otherwise the oil scale will be stale over a long period of time, and even the most advanced beans will be ground into strange-smelling powder. After each use of the bean grinder, be sure to wipe the blade table with the wet market and clean the plastic top cover with warm hot water. But for the American popular flavored coffee, the added flavor is strong and strong, and it will last for a long time. It is best to put two tablespoons of white Jing sugar in and beat it before cleaning. Of course, it is better for a grinder to grind only the same kind of beans, so there is no problem of mixing.

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

There are also medium and fine grinding or finer and finer grinding than fine grinding (powdered coffee powder). The time to grind coffee beans is to brew coffee and only grind the required portion to be of high quality. 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 coffee 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 the coffee can not be brewed anyway. The secret is to consider grinding and homework consistently, so brewing coffee is the most delicious and mellow.

Fine grind

● fine grinding

The particles are fine and the same size as sugar. Medium grind

● medium grinding

The particles are the same size as a mixture of granulated sugar and crude sugar.

Regular grind

● Rental Grinding

The granules are thick and the same size as coarse sugar.

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.

There are three kinds of grinding methods for coffee beans: "grinding", "grinding" and "mortar grinding".

"Grinding" uses two rotating parts to squeeze and crush coffee beans. The grinding parts can be disc-shaped or conical. Conical machines are less noisy and less likely to block. The coffee powder produced by the grinding method is more uniform and the taste is more consistent when cooking. The design of the conical grinding disc reduces the required speed, which is generally less than 500 revolutions per minute. The slower the grinding speed, the less heat generated by friction, so the aroma of coffee is not easy to lose. By adjusting the grinding parameters, the cone grinder can be used for the preparation of different kinds of coffee. A better machine can grind the ultra-fine powder needed for Turkish coffee. Disc grinders generally have higher rotational speed and generate more heat, but they have a wide range of functions, economical and practical, and are suitable for the preparation of most household coffee.

"polishing": most modern machines actually cut coffee beans into pieces at a speed of 20, 000 to 30, 000 revolutions per minute (some people simply use beaters). The consumption of this kind of blade grinder is longer, but the accumulated heat in the grinding and the uneven size of the coffee chips make it difficult to produce high-quality drinks. In theory, this kind of grinder can only be used for drip coffee pots. The dust they produce can clog the filters in Espresso and French press machines.

"mortar mill": if you can't find good grinding equipment, all you can do is to use a pestle and a mortar to slowly enjoy the fun of labor.