Coffee Bean roasting knowledge Oil yield and freshness of Coffee
Oil and freshness: Freshly baked light-baked beans should be dry and oil-free in appearance, and freshly-baked deep-baked beans should be oily in surface. It is the right idea that we should understand. When buying coffee beans, the appearance of oil, no oil is a reference index to judge freshness, but not absolute. It is best to buy fresh roasted coffee beans with good reputation.
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Note that caffeine in deep roasted beans is higher than that in shallow roasted beans.
Because of the high rate of dehydration and weight loss of deep roasted beans, it is necessary to brew coffee with more coffee beans, resulting in drinking more caffeine, so the caffeine of deep roasted beans is higher than that of shallow roasted beans, which is very important. The melting point of caffeine is as high as 237 degrees Celsius, so the roasted caffeine is almost completely retained and dissolved in the cup. People often mistakenly think that the caffeine of deep-baked beans is lower than that of shallow-baked beans, but it may be just right.
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Roasting knowledge coffee deep roasting and shallow roasting
Deep roasting and light roasting is simple, coffee beans are called deep roasting after the second burst, and before the first explosion is dense to the second burst, it is called light roasting to medium-deep roasting, and the color is closer to black with the deeper the roasting. First of all, let's talk about deep roasting. When it comes to deep roasting, be sure to talk about the legendary figure of the coffee industry-Alfred Peet. Mr. Pitt devoted himself to promoting heavy baking in the 1960s
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