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ACM 4.07 – Ineffective Voids

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Ineffective voids Sometimes grinding finer doesn’t increase overall extraction yield. There is a nonlinear relationship between grinding finer and increasing extraction yields with espresso and drip coffee, usually experienced as a slight bell curve. As we grind finer over a range of shots starting from 15 seconds, up to 60 seconds, extraction usually peaks around 40 seconds […]

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