Filter Stories - Coffee Documentaries Freshness and Grinding, Part 2: How grinders work deep inside
May 6, 2024
Dive into the fascinating world of coffee grinding technology. Discover how tiny changes in grind size can dramatically affect flavor and extraction. Explore the balance between efficiency and craft in coffee preparation, as café owners navigate advanced machines versus traditional methods. Uncover the intricate mechanics of different grinder designs and their unique impact on taste. From particle distribution to the science behind coffee fines, this discussion reveals how every detail contributes to your perfect cup.
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Burrs Caused Espresso Speed Shock
- Two nearly identical sets of grinder burrs produced vastly different espresso shots.
- One shot ran in 31 seconds with rich flavor, the other in 7 seconds, watery and sour.
Coffee Fines Impact Extraction
- Minute differences in coffee fines create major changes in espresso extraction time.
- More fines increase resistance, slowing water saturation and improving flavor balance.
Burr Orientation Affects Grind Fines
- Vertical burr grinders use gravity to pull coffee grounds quickly from burrs.
- Horizontal grinders rely on centrifugal force, causing longer contact and more fines.