Roast Assessment

CQC 1.07 Recap and Glossary

  • ال New York Sugar and Coffee Exchange (NYSCE) established the black bean equivalent system of green grading. It is a measure of comparison for evaluating the relative seriousness of defects. For example, five quakers equal one black bean defect. 
  • Defective coffee beans are very common. Approximately 20% of the coffee beans produced in Brazil each year are defective and need to be removed after harvesting.
  • Compared with healthy, good-quality coffee beans, immature beans are lighter, less humid, and deficient in key flavour and body precursors, including sucrose, protein, and total oil content.
  • Colour sorters are not effective at removing quakers from green coffee because their distinctive pale colour becomes exaggerated only after roasting.