Flow Profiling
Flow profiling is a technique used to adjust the water flow rate during shot (espresso) extraction, allowing precise control over pressure, contact time, and the dissolution of coffee compounds.
In practice, water flow rate directly impacts extraction. A slower flow ensures even saturation of the coffee grounds, reducing uneven extraction and enhancing sweetness. On the other hand, a faster flow can lead to increased acidity or bitterness.
Baristas can control the water flow rate by using an adjustable valve positioned between the espresso machine’s boiler and the coffee puck in the portafilter
