[new] — The Physics Of Filter Coffee Epub Updated

The first edition relied on a log-normal distribution of particle sizes. The updated text introduces a bi-modal PSD model based on 2024 laser diffraction data from the Swiss Grinding Institute. This explains why expensive grinders (with tight PSD) produce sweeter coffee: they eliminate the "fines paradox" where extremely small particles over-extract bitterness while large particles under-extract sourness.

Practical tables and formulas for building custom brewing water and understanding extraction at a molecular level. Filter & Equipment Physics:

Percolation physics, extraction dynamics, water chemistry, and the impact of filter paper geometry.