How to select coffee beans whether coffee can be directly brewed after grinding

This is very consistent with the first step in judging the freshness of coffee beans. The shape of good quality coffee beans can also be known from their roasted coffee beans. First of all, it must be big and fat beans, and uniform, uniform size, no color spots, low defect rate. There are generally the following kinds of defective beans after baking:

Fermented beans: coffee beans that fall from the soil before harvest. There is a sour smell, which will have a great impact on the taste of coffee.

Dead beans: also known as unripe beans, or affected by climate and other factors are not sound, fried spots will be produced after baking, so that the coffee has a green taste.

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

Borer beans: coffee beans eroded by insects.

Defective beans: may be stuck during work, or careless handling during handling, resulting in incomplete coffee beans, this kind of beans will cause fried spots during baking, and will produce bitter and astringent taste.

Others: remaining thin-skinned beans, stunted beans, beans that are not completely sour when dried, shell beans with only shell, and so on.

Observe the purity of coffee beans, generally choose coffee beans with high purity

The purity of coffee beans is also another consideration. The expert candidate for coffee is not necessarily to look at the size of the particles, but to grab a handful of individual coffee beans, about dozens of portions, to see whether the color of each single bean is the same. whether the particles are similar in size and shape, so as to avoid buying shoddy products disguised as mixed beans. But if it is a comprehensive bean, it is normal to have different size and color.