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Several common bad kinds of coffee beans

Published: 2026-04-03 Author: World Gafei

Last Updated: 2026/04/03, Fermented coffee beans that fall from the soil before harvest. The moldy smell will have a great impact on the taste of coffee. Dead beans, also known as unripe beans, or affected by climatic factors, the development is not perfect. Fried spots will be produced after baking, making the coffee have a green and astringent taste. Black beans fermented beans, coffee beans that have rotted and blackened. Because it is black, it can be distinguished from normal coffee beans at a glance.

Fermented coffee beans dropped into the soil before harvest. Moldy odor, will have a great impact on the taste of coffee.

Dead beans, also known as immature beans, or affected by climatic factors, development is not sound. After frying, it will produce fried spots, making coffee taste green.

Fermented black beans, rotten, blackened coffee beans. Because it is black, it can be distinguished from normal coffee beans at a glance.

Coffee beans infested with worms. Broken beans may be stuck during operation, or careless handling during handling, resulting in incomplete coffee beans. It will cause fried spots when fried, and will produce bitter and astringent taste.

Other beans with a thin skin, underdeveloped beans, beans that do not completely produce a musty smell when dried, and beans with only shells (shell beans).

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