What causes static in a coffee grinder's receptacle?
What causes static in a coffee grinder's receptacle?
The question of how to reduce static has been asked multiple times on cooking SE (see cooking.stackexchange.com/search?page=1&tab=Relevance&q=coffee%20static). However, I can't find a legitimate answer as to why ground coffee has static build up. Some discuss moister in the beans, but how is that related to static?
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I don't know anything about burr grinders, but with blade grinders you generally get tiny bits of coffee bean being spun quickly around the outer edge of a plastic enclosure. This is a recipe for generating static electricity by the triboelectric effect, the same as rubbing a balloon on your hair or shuffling your feet across a polyester carpet.
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