Premium Coffee beans-SCAA Fine Bean grading system

The new premium bean grading system of the American Fine Coffee Association (SCAA) has been adopted by the American Coffee quality Association (CQI) in recent years.

Raw bean standard:

Sample 350 grams of raw beans, the water content should be between 10% Murray 12%. Raw beans must not have an indecent smell.

The number of raw bean size must be equal, and the size difference rate shall not exceed 5% of the size stated in the contract.

The number of defective beans can be divided into two categories: primary defect and secondary defect. the first-level defect refers to the defective bean with greater influence, and the second-level defect refers to the defective bean with less influence.

If 350 grams of raw beans are randomly sampled, if the following six defects are found to be first-class defects:

1, whole black bean 2, whole sour bean (brown) 3, dried fruit 4, mold infected bean (yellowish brown) 5, foreign body (small stone, wood chip) 6, severe moth (more than three wormholes)

The above first-class defects do not allow full defects, as long as one of the above 1 to 5 is equal to the same full defect, as for the special case 6, more than 5 severe worms must be singled out to be regarded as a full defect.

There is a wide range of secondary defect rules, and the following ten kinds of defective beans are secondary defects:

1, local black bean 2, local sour bean 3, seed shell 4, floating bean 5, unripe bean 6, withered bean 7, shell bean 8, broken / cut bean 9, broken peel 10, slight moth (less than three holes)

For 1 to 2 of the above secondary defects, as long as 3 are selected, they are equivalent to a full defect; 3 to 9, as long as 5 are selected, they are equivalent to a full defect; as for 10, picking out 10 is equivalent to a first-level defect.

Total defects of secondary defects can allow 5, more than 5 full defects, will downgrade non-commercial beans.

For example, 15 local black beans are picked out, which is equivalent to 3 full defects. If there are no other defects, and the cup test score is more than 80, it is still possible to be high-quality beans.

Except for the same full defect such as 5 severe worms, the other 1 defect is equal to the full defect, but the first defect must not have one full defect.

The total number of secondary defects shall not exceed 5.

Even if the cup test reaches more than 80 points, the raw beans do not conform to the above two specifications and cannot be recognized at the high quality level.

Sample 100 grams of coffee cooked beans, do not have an immature white bean.

For each sample of cooked beans, the tester will evaluate the dry, wet, taste and taste of each sample, with a total score of more than 80 points.

Even if the cup test score is higher than 80, the raw bean can not be recognized if it detects one complete defect of the first-class defect or five full defects of the second-class defect.