Coffee science

Extraction, water & brewing science

Long-form explanations separated into focused articles, with definitions, practical examples and clear limitations.

Extraction

TDS and extraction yield

What dissolved solids and extraction yield mean, how they relate, and what the numbers can and cannot tell you about flavor.

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Water

Water chemistry for coffee

A practical guide to hardness, alkalinity, calcium and magnesium — and why water changes what you taste.

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