Slow Pulse

Chemex 10 Cup Chemex by Chemex

Chemex's method provides the basis for this 10-cup slow-pulse version, which follows the bloom with 5 count measured additions and partial drainage. The format promotes even saturation and a clear, composed large batch.

1:17 Ratio

5:30 Total

50g Dose

96°C Temp

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Parameters

50 g
Coffee: 850 g
Water: 1:17
Ratio: 96 °C
Temp: 7 coarse
Grind: 5:30
Total: ~850 ml
Yield

Grind · 7/10 · medium-coarse

FINE COARSE

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Method

5:30 · total

Bloom 1 / 6
0:00

45s

Pour 100g in a spiral. Let it bloom.

+100g→ 100g Spiral 6.7g/s 15s 96°C
Pour 2 / 6
0:45

45s

Pour in a spiral to 270g.

+170g→ 270g Spiral 6.5g/s 26s
Pour 3 / 6
1:30

45s

Pour in a spiral to 440g.

+170g→ 440g Spiral 6.5g/s 26s
Pour 4 / 6
2:15

45s

Pour in a spiral to 610g.

+170g→ 610g Spiral 6.5g/s 26s
Pour 5 / 6
3:00

2m30s

Finish in a spiral to 850g.

+240g→ 850g Spiral 6.5g/s 37s
Done 6 / 6
5:30

Drawdown complete.

Notes

After the bloom, add about 170g with each pulse and let the slurry fall between pours without exposing the bed completely. Use a coarse, uniform grind; if later pulses drain much more slowly, reduce agitation and avoid touching the paper with the stream.

Original source

Recipe by Chemex, published at chemexcoffeemaker.com.

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Chemex

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In the cup