Particle measurement basics
How to measure and understand grind particle size, distribution, and its impact on extraction.
- Coffee Basics Nerds
- 1 min read
Key Concepts
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Particle Size:
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Defines how fine or coarse the coffee grounds are.
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Influences extraction rate: finer grinds increase surface area, coarser grinds slow extraction.
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Distribution:
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Even distribution ensures uniform extraction.
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Broad particle size distribution can lead to over-extraction (fines) or under-extraction (boulders).
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Measurement Methods:
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Sieve Analysis: Sorting particles through meshes of varying sizes.
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Laser Diffraction: Provides precise particle size distribution for research or high-end equipment.
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Microscopy: Visual inspection and digital analysis.
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Practical Applications:
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Adjusting burrs to achieve target particle distribution.
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Using particle measurement to troubleshoot extraction inconsistencies.
Summary
Understanding particle size and distribution is fundamental to controlling extraction quality and consistency. Accurate measurement allows for reproducible results across batches and grinders.