How Espresso Pre-Infusion Works: Methods & Principles

Published: Oct 07, 2026 Author: World Gafei Last Updated: Oct/07/2026 122 views

Learn how espresso pre-infusion works, the different methods used in machines, and why it affects extraction quality.

If you’ve ever wondered why some espresso shots pull smoothly while others channel or under-extract, the answer often starts before the full pressure even hits the coffee puck. Pre-infusion—the initial gentle contact between hot water and coffee grounds—is a key but often misunderstood part of espresso brewing. It’s not a modern fix, but a foundational technique built into many espresso machines, whether vintage or high-tech.

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