4:6 Method

Developed by Tetsu Kasuya. 40% of the water adjusts the balance between acidity and sweetness, while the remaining 60% adjusts the strength.

Beans & Temperature

• 1 (Very Light): 94-96°C
• 2 (Light): 91-93°C
• 3 (Medium): 88-90°C
• 4 (Dark): 84-87°C
• 5 (Very Dark): 80-84°C

App Usage

1. Setup: Select your preferred ratio and choose the number of cups.
2. Profile: Use the Acidity/Sweetness slider to adjust the first two pours (40% of water). Use the Light/Strong slider to set the number of pours in the final phase (60% of water).
3. Water & Coffee: Adjust total water amount with the slider, or click directly on the Coffee/Water gram fields to type your exact amount.
4. Start: Tap 'Start Brewing'. A 3-second countdown gives you time to get ready. The configurator collapses to give full focus to the steps.
5. Follow the steps: Each step displays "Fill to X g". Pour until you reach the target, and wait for the next step. Audio cues will guide you.

Før du brygger

• Skyll alltid filteret. Spesielt viktig med ubleket papir, som avgir papirsmak til kaffen. Hell varmt vann gjennom filteret (og driveren) til vannet renner klart — kast skyllevannet.
• Varm opp utstyret. Kaldt glass eller tynn keramikk stjeler 5–10 °C fra bryggevannet i løpet av de første hellene. Hell skyllevannet ned i koppen også, kast det, og start brygget mens alt er varmt.
• Kverning og filtertype henger sammen. Tetsu-metoden sikter mot ca. 3,5 minutter total bryggetid. Et raskt filter (Kalita Wave, standard papir) fungerer godt med middels-grov kverning. Et tregere filter (metall, tykk papir, Chemex-filter) trenger grovere kverning — ellers tar det for lang tid og kaffen overekstraheres og blir bitter.
  
  Tommelfingerregel: Er koppen ferdigdrippet på under 3 min → kvern finere. Over 4 min → kvern grovere. Ikke juster timeren — juster kvernen.

Tips

• Use a coarse grind. The water should drain completely between each pour.
• Remember to rinse the paper filter with hot water before adding coffee.