Coffee is sorted by size, density, and color in its preparation 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 peaberry 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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