Osmotic Flow

Cafec built the dot-rib geometry for osmotic flow — a single uninterrupted stream that lets the bed hold one steady water column rather than recovering between pulses. Pour into the centre only. The hexagonal silhouette doesn't have corners that need extra coverage; the dot ribs distribute flow on their own. Keep the stream thin and constant — too thick and the bed lifts, too thin and the column starves. A gooseneck is essential here. If drawdown crosses 5:00, go one click coarser next time. The Pro runs slower than the modern Deep 45 at the same grind. Best for medium and darker roasts; the long contact time deepens chocolate and sweet without dragging in bitterness.