The original book devoted significant space to the SCA (Specialty Coffee Association) water standards. The updated edition addresses the "zero water" phenomenon—demineralized water with specific additives (Third Wave Water, Lotus Water). New research shows that the rate of ion diffusion affects extraction speed. The updated EPUB includes graphs on magnesium extraction kinetics that were not present in the first print run.
While the original book was published in 2021, Gagné frequently publishes "updates" and new research on his blog, Coffee ad Astra the physics of filter coffee epub updated
$$Re = \frac\rho v D\mu$$
She put a hand on his shoulder. “Aris. It’s just coffee.” The original book devoted significant space to the