Identification of coffee beans good and bad coffee bean grading system defective bean species identification method

Judgment of appearance:

We can know from the shape of the roasted coffee beans, of course, there can be no bad coffee beans mixed in, what is more important is that normal beans will also be mixed with high-quality coffee beans and cause hindrance. A fried roasted bean that brews delicious coffee must first be big, fat and uniform, and secondly, it must be of the same size without color spots. These are the main points of visual discrimination, if you look carefully, it should not be difficult to distinguish.

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

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

Dead beans: also known as unripe beans, or affected by climate and other factors, imperfect development, fried spots will be produced after roasting, so that the coffee has a green taste.

Defective beans: may be stuck during work, or carelessly handled during handling, resulting in incomplete coffee beans.

Borer beans: coffee beans eroded by insects

Hou's judgment at the time of pawn:

The easiest way to make delicious coffee is to sigh the filter paper. When brewing, there is also a way to judge whether the coffee is delicious, that is, when it is in hot water, the powder is not inflated, and when the coffee is fully roasted and extracted water, there will be beautiful and meticulous foam puffing up.

Judgment during grinding:

After fully roasting and extracting water, the coffee can be brewed into delicious coffee, which can be judged by grinding. When grinding, good coffee beans will gently make the sound of salad salad, gently shake the hand, the original taste of coffee is overflowing. Shoddy coffee beans have a creaking sound. There is a feeling of sticking during grinding.

Judgment after pawn:

Although the concentration of coffee will change due to different roasting degree and extraction method, the characteristic of delicious coffee is that the coffee liquid extracted by the pawn is clear under the same conditions. The spoon can be clearly seen through the stroke fluid in the picture below, while the one in the stone picture is almost invisible. It is difficult to tell whether a cup of coffee is delicious, but if you compare it, you can see whether the coffee is delicious or not. even after 30 minutes, the color of a delicious cup of coffee is still clear and the taste will not change.

Judging from the taste and aroma of coffee:

The sour taste of delicious coffee is as refreshing as citrus fruit, without strong sour taste. Bitterness is a soft bitterness. There is no bitterness like cigarette or scorch.