Puck Preparation
WDT, distribution and tamping
The Perfect Puck
In espresso, puck preparation is crucial. An evenly distributed, correctly tamped puck is the foundation for even extraction.
WDT (Weiss Distribution Technique)
A fine needle or WDT tool breaks up clumps in the ground coffee. The needle is moved in circles through the grounds before tamping. This prevents channeling.
Distribution
Before tamping, coffee should be evenly distributed in the basket. Options:
- Finger leveling: Smooth with your finger
- Distribution tool: Adjustable disc that evenly distributes coffee
- Tapping: Side-tapping against the portafilter
Tamping
- Pressure: approx. 15-20 kg - even and straight
- Level: The puck must be flat, not tilted
- Tamper size: Must exactly match the basket
The Sequence
Grind → WDT → Distribution → Tamping → Extract. Every step influences the result.
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