Oil yield and freshness of roasted coffee with oil
Oil yield and freshness: the appearance of freshly baked shallow baked beans should be dry without oil, and the surface of freshly baked deep baked beans should be oily. It is the correct idea that we should understand. When buying coffee beans, the appearance of oil, no oil is a reference index to judge the freshness, but not absolutely. The best policy is to buy reputable freshly roasted coffee beans.
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Common sense of roasting coffee beans deep roasting and light roasting of coffee
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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Note: caffeine is higher than shallow roasted beans.
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 roasted beans is lower than that of shallow roasted beans, but the fact may be just the opposite. due to 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.
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