Does the size of coffee powder affect the concentration of espresso?-how to drink illy espresso powder

Does the size of coffee powder affect the concentration of espresso?-how to drink illy espresso powder

Flannel filter drop bubble grinding method: medium

Its bubble method is more or less the same as filter paper, but the coffee taste is more detailed, it can make the coffee bitter. Sour taste and other characteristics are completely presented, but the inconvenience of flannel filter is in maintenance, cleaning and finishing. When using it for the first time, rinse it with hot water, then boil it in boiling water soaked in coffee powder or tea dregs for 10 minutes to remove the stench of the cloth, then rinse with water, rinse clean with hot water after use, soak in cold water and store. Remember not to use soap or dry directly, otherwise it will produce a bad smell. When refrigerated, it is best to put it in an airtight container so as not to stain the smell of other foods.

Brewing step: remove the filter from the water, gently wring the water with your hand, pour the coffee powder into the filter with the plush facing outward, gently shake, drop the boiling water into the coffee, from the center to the surrounding, do not inject too much at one time, lest the coffee powder begin to expand, produce fine foam from the filter and lower a few drops of coffee liquid from the filter. When the coffee liquid becomes light brown, remove the filter immediately. Sometimes when the foam is mixed with impure substances, the taste of the coffee will get worse, and after the extraction, the central part will not sink, and there will be no foam left on the surface.

According to the European Fine Coffee Association (SCAE-Speciality Coffee Association of Europe), the rough grinding of the French filter pot indicates that each bean is crushed into 100,300 particles, each about 0.7mm in diameter. In the medium rough grinding of the electric filter pot, each bean is ground into 500 grains of 800 particles, with a diameter of about 0.5 mm. Moderately ground by hand and siphon, each bean is ground into 1000 to 3000 particles with a diameter of about 0.35. The fine grinding of espresso in which each bean is ground into 3500 particles with a diameter of about 0.05mm. Turkish coffee is ground into a flour-like ultra-fine powder, and each bean is ground into 15000mm 35000 particles.

The grinding of coffee needs the right tools. The particle thickness after grinding affects the extraction efficiency of coffee. The thickness required is related to the utensils used for coffee brewing. American drip filter pot or ear bag drip brewing, excluding taste differences, should theoretically be medium particle grinding, while coffee powder used in automatic or semi-automatic Italian coffee machine should be fine grinding; deep roasting should be more coarse particle grinding, while moderate and light roasted coffee beans should be relatively fine grinding. Knife-edge grinder or manual coffee grinder can not grind coffee beans to the same thickness, which will greatly affect the extraction of coffee, resulting in waste and unable to obtain satisfactory coffee taste. It is recommended to use a special coffee grinder to grind coffee powder in order to obtain satisfactory extraction effect.

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