The strength and skill of pressing coffee powder has a great influence on the quality of coffee.
(Ⅵ)
Chapter 6 Pump Pressure
The most mysterious part of brewing coffee is that the roasted beans not only contain fragrant flavor, but also contain other substances that taste worse. At the beginning of this century, Italians came to the correct conclusion:
Pressurizing water can separate these two substances more efficiently.
The oil is emulsified by pressure and extracted to form crema, a reddish brown foam. Crema contains delicious substances that are refreshing. What is the optimal pressure? It is generally believed that the pressure of boiling espresso should be between 8.2 and 9 atmospheres. I set it at 8.2 atmospheres.
steady pump pressure
The water pressure in our shop is very unstable, high in the morning and low in the afternoon. Sometimes there will be a momentary surge, and even when the dishwasher in the back is flooded, it will affect the espresso machine in the front bar.
As soon as the inlet pressure changes, espresso's rotary pump also changes. In order to solve this problem, we installed a 3 gallon stainless steel tank in front of the water inlet of the espresso machine, equipped with an automatic water inlet device (including float switch, solenoid valve, adapter), which can maintain the pressure of the water inlet at 1 atmosphere.
potential trouble
Care should be taken not to leak gas from these newly added pipe fittings. Pump inlet can not be empty without water pumping. Otherwise, the pump of the espresso machine, which was originally used to pump water, will suck in air and will not work, and the pressure will not come up.
Espresso Coffee: Professional Techniques 1996 Edition
Source: Bolan Coffee College
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Details that should be paid attention to in the extraction of Espresso espresso by Italian fully automatic and semi-automatic coffee
(Ⅷ) Chapter 8 cleaning machines-the second golden rule is that coffee grease will continue to stick to the surface that the coffee liquid touches. Because of its unstable chemical properties, the accumulated grease will soon become bitter. When freshly brewed coffee comes into contact with these old oils, it will smell rotten. The bad news is that there is a widespread problem of dirty machines in American cafes.
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Debugging and selection of Italian coffee grinder the difference between electric hand-operated household bean grinder
(Ⅳ) when the Espresso bean grinder Espresso cooks something wrong, it is often difficult to find out the exact reason. That is because there are too many reasons for making good coffee and are related to each other. As long as there is a little mistake (such as the beans are not fresh, the hot water temperature is not right), a cup of espresso will be ruined! The quality of the bean grinder is one of the most important factors. Why is the bean grinder this
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