Anti-static strategies

Why Static Happens

• When beans pass through burrs, friction and particle collisions generate electrostatic charge.
• Dry environments (low humidity) and certain plastics amplify the effect.
• Results in: coffee spraying, clumps, and uneven distribution.

Symptoms of Static Issues

• Grounds cling to chute or portafilter.
• Coffee sprays around grinder.
• Inconsistent dose weight due to retention on surfaces.

Anti-Static Strategies

1. RDT (Ross Droplet Technique): Lightly mist beans with water before grinding (one drop per dose). Greatly reduces static.
2. Humidity Control: Maintain ambient humidity (40–60%) to minimize charge buildup.
3. Grinder Materials: Metal chutes and anti-static coatings discharge static better than plastic.
4. Ionizers: Some grinders integrate ionizing technology to neutralize charges.
5. Workflow Tweaks: Tapping portafilter or dosing cup helps settle clumps.

Best Practices

• Use minimal water with RDT to avoid damaging burrs or causing rust—just enough to coat beans.
• Clean grinder regularly; built-up oils make static worse.
• In commercial settings, consider grinders with anti-static flaps or chutes built in.

Summary

Static is a natural byproduct of grinding but can be controlled with simple techniques. From RDT and humidity management to anti-static grinder design, these strategies ensure cleaner dosing, reduced clumping, and more consistent brews.

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• Best Practices