Espresso
Pressure Profiling
The practice of varying water pressure during espresso extraction rather than maintaining a constant 9 bars. Pressure profiling allows baristas to manipulate flow rate and extraction dynamics in real time.
In Depth
Machines with pressure profiling capability—such as the Decent DE1, La Marzocco Strada, or Slayer—allow baristas to program or manually control pressure curves throughout the shot. A common profile starts with a low-pressure pre-infusion (2–4 bars), ramps to peak pressure (6–9 bars) during the main extraction, and then declines toward the end to reduce channeling and astringency. Profiling unlocks flavor nuances unavailable at flat 9-bar pressure, particularly with light-roasted specialty coffees that benefit from gentler, longer extractions.