Coffee is sorted by size, densityThe density of a coffee bean is often taken as a sign of quality, as a more dense bean will roast more with a better dynamic. The density..., and color in its preparationPreparation refers to the dry-milling steps of preparing coffee for export: hulling, grading, classifying, sorting.: Preparation refers to the dry-milling steps of preparing coffee for export: hulling, grading,... for export.: Sorting refers to several steps performed in the preparation of coffee for export. Coffee is sorted by size on a grader or screener (and peaberryA peaberry is a green coffee "bean" that has a rounded form: Coffee is the dried seed from the fruit of a flowering tree - each fruit having... is sometimes removed as well). It is sorted by density on a density table (Oliver table, or rarely an air density sorter). It is sorted by color with a high tech optical color sorter, and/or by hand, visually.
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