WATER CHEMISTRY BULLETIN
Specialty Coffee Physics & Extraction Chemistry.
Total dissolved solids refractometry, calcium-magnesium mineral hardness, and burr grinding grind distribution.
Water Mineralogy
Bicarbonate Buffering: The Chemical Impact of Alkalinity on Chlorogenic Acid Perception
Why controlling buffer alkalinity below 45 mg/L CaCO3 prevents dulling delicate citric and malic acids in light roasts.
8 min read • Verified Metric
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Laboratory Telemetry
21.4%
Extraction Yield Target
1.38%
Total Dissolved Solids
18 Bar
Pre-Infusion Pressure Ramp
CALIBRATED: 2026-10
Particle Size Bimodality: Laser Diffraction Analysis of Flat vs Conical Burr Sets
How eliminating sub-100 micron fines enables higher extraction yields without astringent channel-induced overextraction.
9 min read
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Declining Temperature Profiles in Espresso: Mitigating Phenolic Astringency at Extraction Tail
Starting extraction at 94°C and tapering to 88°C as soluble organic compounds become depleted.
7 min read
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Puck Erosion Dynamics: Flow-Profiling and Declining Pressure Ramps in Espresso
Reducing pump pressure from 9 bar down to 5 bar as dissolved solids are washed out of the coffee bed.
8 min read
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