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- 01 Devil Switch byTetsu Kasuya Tetsu Kasuya's "Devil" recipe for the Hario Switch. Uses two temperatures — 90°C for the pour-over phase and 70°C for the immersion phase — to maximize sweetness while minimizing bitterness. Hario Switch 02 Ratio 1:14 Time 3:30
- 02 Devil's Recipe byTetsu Kasuya Tetsu Kasuya's original hybrid Switch recipe: alternates between open percolation and closed immersion with temperature drops for complex extraction. Hario Switch 02 Ratio 1:14 Time 3:00