How to judge the freshness of coffee beans?

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Judging from the integrity of the appearance: the appearance of good coffee is intact, not broken.

Judging from the particle size of the appearance: the particles of a single cup of coffee should be consistent. On the other hand, it is normal for coffee to vary in particle size. We can only judge whether the coffee beans are uniform or not, but the bigger the coffee is, the better the quality. this is a misconception, especially the so-called pure blue mountain coffee, which does not mean pure blue mountain coffee.

Judging freshness from the appearance of luster: good coffee has the same color and luster, lightly roasted coffee beans (cinnamon) are shiny but not oily, lightly roasted beans will also produce oil if they are placed for a long time or close to moderate roasting, moderate roasted beans are normal, and deep-roasted coffee beans should also show oil. The reason for the bright appearance is that the relationship between the oil and oil of the coffee itself is normal, on the contrary, if the medium-deep coffee beans do not produce oil, it may be that the oil has been dried for too long and it is not fresh.

Judging from the aroma of coffee beans: in addition to judging by whether the appearance is oily or not, it is finally confirmed by smelling that fresh coffee beans should show the natural aroma of roasted coffee beans. if it shows oil groaning or other strange smells such as mildew and medicine, it is also an important indicator that coffee beans are not fresh.

Judging from the crispness of coffee beans, good coffee beans are crisp, and it is also a key point to notice whether the color inside is even after crushing it with your hands.

In fact, from the outside, it is only a preliminary judgment when we buy it. Just because it doesn't smell good doesn't mean it doesn't smell good. In the end, it has to be cooked in order to see the true chapter.