Correct extraction steps of espresso to determine the ratio of grinding degree and powder to water of Italian coffee beans

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Characteristics of espresso

Using a coffee maker, put the ultra-fine ground coffee powder into a cup-shaped metal filter and extract coffee in warm water (30ml) at 9 atmospheric pressures and about 90 °hot water for about 1 ounce 25 to 30 seconds. Unlike paper, this method of extraction is also extracted with a metal filter so that all the ingredients of the coffee are fully displayed in the cup. If you extract it with delicious coffee, you can also feel the taste of a fruit.

History

The Italian word for Espresso means express / express was born in Italy in the 18th century.

In 1806, Napoleon issued a continental blockade to boycott British products. It is in Italy, due to the cup size of 2 Universe 3 as a last resort deficiency, sudden coffee beans, reducing the amount of coffee, it is very difficult to desperately lower the price of policy competition. As a result, it has accepted the style of drinking in small cups, which is said to be the origin of the current demittas style. Now the Espresso coffee machine is in the origin of the coffee machine, and it was developed by Luigi Bezera in its pursuit of the extraction rate in 1901, a century after the birth of the coffee cup. It is said that in the early 1980s, espresso spread to the United States came from Seattle. In Italy, while serving coffee in BAR (Pakistan), there are many available in a cafe space shop that is American, and also styled, such as milk cappuccino and latte, said to be headquartered in Seattle I will. In the mid-1990s, when the Seattle family coffee chain opened, espresso began to attract attention in Japan.

Let's get ready to extract coffee.

Espresso can efficiently emulsify aromatic oil and water in a short period of time, so it is generally believed that medium concentration of "city-city" ultra-fine ground beans is very good. Carbon dioxide gas is produced after roasting coffee. Because this gas hinders the infiltration of hot water, the components can not be fully extracted. Therefore, it is necessary to calm the aging of beans.

In addition, the amount of espresso can be extracted from 1 cup to 2 cups, 1 cup and 2 cups filter.

Italian coffee beans

Grind degree of Italian coffee

Grinder

For espresso, coffee beans that are ultra-fine and evenly ground must be emulsified in a short period of time. There are two types of grinding blades for espresso.

Flat type

When flying beans horizontally by centrifugal force, two discs with fine blades are rotated radially and finely ground.

Conical type

Combine the two round blades into a concave and convex shape, rotate and grind the coffee beans and drop the powder down. Because it reduces the rotation times of the blade, it is not easily affected by motor friction and heat, so it has less effect on beans.

Start extraction.

1: exquisitely wipe the sensory handle. If it is wet by water droplets, or if the coffee powder extracted previously remains, it will affect the taste of the liquid in the cup.

2: fill the filter with powder. Flatten all the powder so that the filter is evenly filled with powder.

3: to prevent looseness. Apply a force of about 20k from the level directly above and compaction.

4: let's clean up the coffee powder around the handle. This may cause the head to get dirty during cooking.

5: preheat and boil the head. (remove hot water from the group head, do not install)

6: install the handle on the group head.

7: press the extraction button immediately after installation.

8: the extraction time is 20 to 30 seconds, and the finished volume is about 25 to 30 milliliters.

Complete the extraction

It is creamy and full of taste.