Bottomless Portafilter Spraying: How to Eliminate Channeling and Micro-Puck Fractures
Switching from a standard spouted portafilter to a naked (bottomless) portafilter is the ultimate diagnostic test for any home espresso setup. With the bottom metal floor and twin spouts removed, you are exposed to the raw physics of high-pressure extraction. If your puck preparation, grind distribution, or tamping technique is flawed, a bottomless portafilter will … Read more