Hulls dried coffee to remove parchment or dried fruit layers, with optional polishing, before sorting and grading.
Dry milling hulls dried coffee, removing the dried fruit layers by friction or blade and screen methods, with optional polishing to remove silverskin. It is followed by sorting, in which size sorting precedes density and color work. One reference notes that physical damage increases sharply below 12% moisture.
How it worksHulling removes the dried fruit layers by friction or blade and screen methods. Polishing is optional and removes remaining silverskin.
Step by step
- 01
Hull the dried coffee.
- 02
Optionally polish to remove silverskin.
- 03
Pass the green coffee on to sorting.
Our notes on Dry Milling are still being checked against their sources, so for now this page shows only the facts we can stand behind.
What can go wrong
- Physical damage to beans increases sharply when moisture is below about 12%.
At the same stage
Sources · 1 Every sentence here was checked against a source we read. Taste notes are what guides describe, not promises about your bag. Last revised 2026-09-30.
- Coffee processing · Wikimedia Foundation