How many kinds of defective coffee beans are there | learn about the harm of defective coffee beans

Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style)

Coffee bean is not only a kind of crop, but also the seed of coffee fruit, because it is a crop, so the quality of coffee bean is good and bad, coffee bean will be affected by various factors and then produce defective beans. Defective beans are caused by improper handling. These beans affect the flavor of coffee and are the chief culprit for destroying a good cup of coffee. Next, I would like to introduce the defective beans and hazards of coffee.

All black bean (Full Black)

Features: whole or local raw beans are black and opaque.

Cause of formation: blackening is caused by excessive fermentation, such as fermentation or smelly, dusty odor, mildew and decay.

All sour beans. Local sour bean (Full Sour.Partial Sour)

Characteristics: beans are considered sour beans when they appear yellowish brown or reddish brown.

Cause of formation: sour beans are contaminated by bacteria in the process of harvest and treatment.

Mildew damaged bean (Fungus Damage)

Characteristics: yellow-brown reddish-brown spots in the initial stage of mildew-damaged beans indicate that they are eroded by irritant spores.

Cause of formation: mildew damage to beans is usually due to the presence of mold spores on beans, which will cause mold to grow and infect beans when stored at a certain temperature and humidity after harvest.

Worm-eaten bean (Insect damage)

Features: diameter 0.3-1. Smm's small black hole is usually on the inside of the coffee bean.

Cause of formation: in coffee agriculture, insect pests are the most serious, and insects have already drilled into the fruit to breed while the fruit is still on the tree.

Broken bean (Broken bean)

Features: broken beans usually have a dark red area because of oxidation. Cause of ◎ formation: broken beans usually break when dealing with pulp or dry processing, incorrectly correcting the machine and excessive friction or extrusion.

Immature bean (Immature bean)

Features: immature beans can be distinguished from the pale and yellowish green skin or the white spots of the skin.

Reasons for formation: there are many reasons for not fully maturing, inappropriate harvesting of immature fruits and berries that are too late for ripening at higher elevations.

Deformed bean (Deformity beans)

Features: abnormal shape, off-center incision slightly enlarged. The cause of ◎ formation: growth defects, physiological factors.

Shell shape (Shell)

Features: shell beans are separated and deformed from the inside or outside at the same time.

Cause of formation: it is mainly caused by genetic variation.

Floating bean (Floater)

Features: floating beans are particularly white or faded, while raw beans are spotted.

Cause of formation: for processing, this disadvantage is caused by improper storage or drying, which usually leads to discoloration or low bean density.

The harm of defective beans

Defective beans belong to a kind of diseased beans, so if they are not selected, they will infect other good coffee beans during transportation, resulting in a decline in coffee quality. if roasted without selection, it will affect the flavor of the whole cup of coffee. drinking may also cause diarrhea, serious vomiting and other diseases, so the harm of defective beans is obvious.

How important is the process of picking beans if you want to have a good cup of coffee. A cup of coffee that does not pick beans will certainly have a great impact on the overall quality, but the flavor of the coffee may be slightly defective, or it may be some very unpleasant taste, the so-called "a grain of mouse shit spoils a pot of porridge". It's really appropriate to put it here.

END