Green Coffee Grading Protocols

The Grading Green Coffee protocol is based on the SCA Green Arabica Coffee Classification System (GACCS) version Spring 2000 and the SCA Defect Handbook dated April 2, 2004. The Defect Handbook defines what are considered defects for the SCA GACCS. If the coffee imperfection is not found in the Defect Handbook, it is not considered a defect for purposes of Evaluation. 

Grading Principles

  • The SCA GACCS determines the conversion or equivalent of single defects to full defects.
  • The numbers of full defects are calculated on a basis of 350 grams of green coffee sample.
  • Bean imperfections need to have the specific bean characteristics and criteria as they appear on the picture and physical description in the Defect Handbook to be considered a defect.
  • A full defect can be a Category 1 (primary) or a Category 2 (secondary) defect.
  • Specialty Grade samples must have zero Category 1 defects and no more than five Category 2 defects.
  • A full defect is composed of one or more single defects depending on the impact each one has on the cup. Each defect is described in detail in the SCA Defect Handbook.
  • A full defect cannot be a fraction or a decimal. The correct way to count a defect is to consider defect numbers as integers rounding down instead of up.
  • In the case that more than one defect is observed in a coffee bean, it shall be counted only as the defect that has the greatest impact on the quality of the cup, (the defects listed first in the SCA Green Arabica Defect Handbook are considered to have the greatest impact on cup quality).
  • The SCA GACCS only defines two grades of coffee, Specialty Grade and Premium Grade. Other grades need to be defined as “Not classified by SCA GACCS”.
  • In cases where several beans are considered to constitute a full defect (such as 5 broken beans = 1 full defect), the calculation showing the conversion of single defects to the correct amount of full defects must be shown.
  • A bean is judged to be partial or full sour only if the orange/red color has fully penetrated the body of the bean, but not if the red color is only present on the silverskin (these are otherwise known as a “foxy” bean). A bean is deemed immature only if the silverskin is still firmly attached. To determine this, one may scratch it with a fingernail or rub the bean on a rough surface.

Green Grading Form

  • This form may be downloaded from the SCA store and available for free to SCA members here. It is to be filled out completely.
  • Each grader (primary grader and verification grader) must write their name, date and the Sample identification code number in the space provided.
  • Clearly specify the Grade of the coffee in the space provided on the form stating one of the following classifications:
  • Specialty Grade
  • Below Specialty Grade
  • Show the calculation from individual defects to full defect equivalent.
  • All final results are based on a 350 gram sample equivalent.
  • Summarize the total number of Category 1 and Category 2 defects. This final result must be recorded on the upper right hand corner box of the grading form.
  • Evaluation of the total number and type of defects will determine the grade (Specialty/ Below Specialty) of the sample. This result must appear in the box provided for GRADE.
  • Each sample must be evaluated for color. Blue-Green, Bluish-Green and Green are the acceptable colors for Specialty Grade. A Greenish or inferior sample would not qualify.
  • Each sample must also be evaluated for foreign odors. Graders need to stick their nose into the sample and inhale strongly to detect any foreign odor. Only samples that are completely free of foreign odors can qualify as Specialty Grade.

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