Fine Coffee learn to make espresso Why should the coffee powder be compacted
Seeing this problem a few days ago, I felt that it was necessary to popularize the knowledge of grinding, pressing and applying powder. The reason for compacting the coffee powder is that when using an Italian coffee machine, the hot water brewed has about 9 atmospheric pressure, which is very stressful. When the water penetrates the coffee cake, the water is inert. What is inertia, that is, water will penetrate through the weakest part of the coffee cake, not from the thickest place. Therefore, if it is not compacted and flattened, the essence of coffee will not be extracted, or some parts will be over-extracted.
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Various technical standards of CREMA for boutique coffee
Color: the aromatic oil is dark brown or hazelnut with a red mark. Sometimes there are even light stripes. Sex: aromatic oils are 2-4 mm thick, with slight or no buttonholes. Persistence: the aromatic oil does not fade for a long time, leaving a brown circle on the inside edge of the cup after drinking coffee. Concentration: strong, rich, strong aroma. Fine: elegant
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Fine caffeine has nothing to do with the content of caffeine
Let's go to the coffee shop for a cup of coffee tonight. Many people will look embarrassed to hear such an invitation. Lying awake in bed after drinking coffee, with the terrible memory of being unable to sleep for a long time with our eyes open, makes us avoid caffeine. In fact, this is our biggest misunderstanding about coffee, not all coffee will affect sleep. Generally speaking, coffee tastes strong, which refers to coffee.
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