Basic knowledge of coffee size specifications and grades of coffee beans

A. Coffee can be divided into washing type and non-washing type according to specifications, and can also be divided into flat beans and round beans.

Washing type: In the sink, after rubbing with water flow and utensils, remove pulp and colloid and dry, called washing type coffee beans, its quality is uniform.

Non-washing type: After natural drying in sunlight, remove the pulp and peel with a shelling machine, and its quality is unstable.

Coffee fruit is composed of two oval seeds facing each other. One side of the joint is a flat joint, called a flat bean. But there is also a round seed, called round beans, which taste no different. The ripe coffee fruit is multi-structured. In the middle are coffee beans, pale green seeds.

B. Size of coffee beans

Filter number (meshno.) Coffee Bean Size

Flat beans 20~19 extra large

18 major

17 is large.

16 Ordinary

15 in

14 small

13~12 very small

Round beans 13~12 large

11 is large.

10 Ordinary

9-of

8 small

C. Elevation

According to the elevation of the cultivated land, it can be divided into three, four and seven grades. Generally speaking, upland beans are of better quality than lowland beans, and because of increased freight costs, prices are higher.

Grade Name Elevation (m)

1 special bean 1.500~

2 Superior beans 1.200~1.500~

3 Medium beans 1.000~1.200

4 Special washed beans 900~1.000

5. High-quality washed beans 760~900

6 Premium washed beans 610~760

7 Excellent washed beans ~610

D quality

According to statistical methods, the type and quantity of impurities contained in a certain amount of samples are converted into a percentage of "defect number" to determine the basis of quality class. The smaller the number of defects, the higher the quality.

E. Taste

Brazil, Haiti, Kenya, Sai and other countries have their own taste test methods, after taste testing before export.