Smell: Fresh coffee beans smell strong, otherwise tasteless or bad smell.
See: Good coffee beans are complete in shape and full in size. Otherwise, the shape is incomplete.
Pressed: Fresh coffee beans are crispy when pressed, with aroma wafting out when cracked.
Color: Dark black coffee beans, brewed coffee has bitter taste; yellow coffee beans, brewed coffee with sour taste.
Good coffee beans, neat in shape, bright in color, roasted by single frying. After brewing mellow, aftereffect foot; bad coffee beans shape is not uniform, and individual incomplete incomplete. After brewing, talk about fragrance, not enough fragrance.
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