Sourdough Bulk Fermentation Time at 71 Degrees (71°F / 22°C) with 22% Starter (+68.4% Rise)
Thermal carryover modeling into a 38°F retarder from 71°F (21.7°C) at 22% levain: target +50.9% vertical climb (6.04 cm).
Baking at 71°F (21.7°C) with 22% inoculation (110g starter/500g flour) sets a 5.6–7 hour bulk clock before core cooling past 44.1°F. Aim for +68.4% true volumetric expansion (+50.9% vertical height rise in a sloped bowl to 6.04 cm) and avoid the +94.9% volume explosion of doubling height.
- Estimated Bulk Time
- 5.6–7 hrsAt 71°F (21.7°C) with 22% starter (Q10=0.74x)
- Target Aliquot Volume Rise
- +68.4%Capped volumetric cutoff (<44.1°F dormancy)
- Sloped Bowl Height Target
- 6.04 cm+50.9% vertical climb from 4.0 cm
- 2x Height Trap Warning
- +94.9% VolCoil fold every 34m (LAB 5.0:1)
Conical Height vs. Aliquot Volume Matrix Centered on 71°F / 22% Starter
5-point neighborhood comparison around 71°F (21.7°C) and 22% starter (110g/500g flour), showing window hours, conical height rise %, straight-wall volume rise %, and 34-min coil fold intervals.
| Temp & Levain Seed (Around 71°F / 22%) | Fermentation Window | 9" Conical Height Rise | Straight-Wall Volume Rise | Coil Fold Cadence |
|---|---|---|---|---|
| 69°F (20.6°C) @ 20% (100g) Cooler / Lower Seed | 7–8.5 hrs (420–510m) | +56.3% height (4.0 → 6.25 cm) | +75% vol (2x trap: +107.4%) | Every 37 min (Row 1) |
| 71°F (21.7°C) @ 20% (100g) Baseline Temp / Lower Seed | 6–7.5 hrs (360–450m) | +51.2% height (4.0 → 6.05 cm) | +68.8% vol (2x trap: +95.5%) | Every 34 min (Row 2) |
| 71°F (21.7°C) @ 22% (110g) [Current Target] | 5.6–7 hrs (336–420m) | +50.9% height (4.0 → 6.04 cm) | +68.4% vol (2x trap: +94.9%) | Every 34 min (Row 3) |
| 71°F (21.7°C) @ 25% (125g) Baseline Temp / Higher Seed | 5.1–6.3 hrs (306–378m) | +50.6% height (4.0 → 6.02 cm) | +67.9% vol (2x trap: +94.1%) | Every 33 min (Row 4) |
| 73°F (22.8°C) @ 25% (125g) Warmer / Higher Seed | 4.4–5.5 hrs (264–330m) | +44.7% height (4.0 → 5.79 cm) | +59.3% vol (2x trap: +80.9%) | Every 30 min (Row 5) |
Custom Batch Recalculation Engine
Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your bulk fermentation temp × inoculation ratios locked.
When to Stop Bulk Fermentation at 71 Degrees (71°F / 22°C): Target +68.4% Rise
Alveograph tenacity-to-extensibility (P/L) ratios shift rapidly at 71°F (21.7°C) when seeded with 22% levain (110g/500g). Across 5.6–7 hours (Q10=0.74x), each 34-minute coil fold restores elastic recovery until the +50.9% sloped-bowl mark (6.04 cm, +68.4% volume) signals immediate shaping.
When dough at 71°F (21.7°C) and 22% starter enters cold storage after 5.6–7 hours, heterofermentative bacteria remain active down to 39°F even after yeast halts at 44.1°F. Locking bench rise at +68.4% (+50.9% height to 6.04 cm) balances the 5.0:1 acid profile and avoids +94.9% over-expansion.
Step-by-Step 71°F / 22% Starter Execution & 6.04 cm Cutoff
- Formula Seeding (110g Starter / 71°F): Fold 22% active starter into your 500g main flour dough at 71°F (21.7°C) (Q10 factor 0.74x).
- Interval Folding (34 Mins Apart): Apply wet-hand coil folds every 34 minutes to reinforce disulfide cross-links during the 5.6–7 hr bulk.
- Conical Frustum Inspection (6.04 cm): Verify a +50.9% vertical rise (4.0 → 6.04 cm, equal to +68.4% volume) rather than risking a +94.9% 2x height explosion.
- Cold Proofing Arrest (<44.1°F): Pre-shape, rest 20 min, final-shape, and load into a 38°F fridge so fermentation tapers off below 44.1°F.
Technical Q&A: Sourdough Bulk Fermentation Time at 71 Degrees (
Can I cold-retard a 71°F (22% starter) dough for 16 hours after bulk?
Yes—provided you terminate bench fermentation at +68.4% true volumetric expansion (6.04 cm sloped height) after 5.6–7 hrs so thermal carryover to 44.1°F does not overproof the gluten.
How many hours should sourdough bulk ferment at 71°F with 22% starter?
At 71°F (21.7°C) with 22% starter (110g per 500g flour), bulk fermentation takes 5.6 to 7 hours (Q10=0.74x) to reach +68.4% true volumetric expansion (+50.9% vertical height rise in a sloped bowl).
Why is the recommended rise capped at +68.4% for 71°F and 22% starter?
Capping bench expansion at +68.4% true volumetric expansion (+50.9% vertical height rise in a sloped bowl) preserves glutenin elasticity against protease clipping (Q10=0.74x) and avoids a +94.9% volume explosion.