Fines migration and flow restriction
How fines migration—the movement of tiny coffee particles during extraction—affects flow restriction, channeling, and cup quality.
Channeling uneven
Channeling detection and mitigation
How to detect espresso channeling, understand its causes, and apply puck preparation techniques to prevent it.
Distribution methods (stockfleth, OCD tools)
The most common espresso distribution techniques—manual methods like Stockfleth’s move and mechanical tools like OCD—and how they influence puck uniformity.
Headspace and puck depth
How headspace and puck depth in the portafilter affect flow dynamics, extraction uniformity, and flavor in espresso.
Preinfusion and blooming espresso
How preinfusion and blooming techniques affect espresso puck saturation, extraction uniformity, and flavor outcomes.
Advanced agitation techniques
How different agitation methods influence extraction uniformity, clarity, and body in filter brewing.