Coffee common sense A cup of strong espresso coffee is the right temperature.
Espresso commonly used temperature: 90.5C
Forgetting who measured this temperature may be the result of a long trial, just like traditional Chinese medicine, rituals and experience all play a role. If the temperature is lower than this, espresso will become sour, while higher will be bitter. This is not fooling people casually. For a while, the temperature of my coffee machine dropped to more than 80 degrees, and the aftertaste of the espresso became very astringent. I thought it was the bean problem. Later, I used the temperature to measure the water temperature to find out the problem.
But 90.5 degrees is not a standard value, a senior brista will understand that air pressure and other factors can also affect coffee, high altitude areas will increase a small temperature to match coffee beans, and French filter pot coffee making, the temperature will often be as high as 95 degrees. So don't trust coffee drinkers who spread the temperature as if it were a Bible.
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Coffee basics espresso Coffee Bean Source
Espresso commonly used beans we know that coffee beans are generally divided into Arabica and Robusta, the former is usually more advanced, the latter is promoted because the latter is easy to feed, like weeds with strong vitality. The former is not only usually raised at high elevations, but also vulnerable to insect pests. Robusta is usually the main ingredient of instant coffee.
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Basic knowledge of fine coffee the main chemical constituents of raw coffee beans
Main chemical components of raw coffee beans: content (%) carbohydrate 60.0 reducing sugar 1.0 sucrose 7.0 pectin 2.0 starch 10.0 garrison 5.0 hemicellulose 15.0 holocellulose 18.0 lignin 2.0
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