A round filtration system, sometimes constructed from stainless-steel mesh or the same permeable materials, measuring 51 millimeters in diameter. This implement is positioned atop the tamped espresso grounds inside an espresso machine portafilter previous to extraction. It acts as a barrier between the group head and the espresso puck. For instance, a barista may use this implement after tamping the espresso to make sure even water dispersion.
The implementation of this barrier affords a number of benefits through the espresso-making course of. It promotes a extra uniform saturation of the espresso grounds, doubtlessly lowering channeling and resulting in a extra balanced extraction. Additional, it aids in preserving the espresso machine’s group head cleaner by stopping espresso grounds from backflushing into it. Traditionally, such methods aimed to enhance extraction consistency and gear upkeep have been employed in varied types throughout the specialty espresso business.
