Extreme 90% Hydration Sourdough (700g Flour): 561g Base + 62g Bassinage (2-Loaf Batch)
Ciabatta-style 90% formula on 700g flour (1478g batch) with 62g bassinage staging and -7g starter deduction.
Target 90% hydration on 700g flour requires accounting for 140g levain (70g flour / 70g water); otherwise 630g water yields 90.9% (+0.9% jump). Pouring 623g water (561g base + 62g splash) and 15.4g salt for a 1478g dough locks True Total Hydration at 90.0% (target 90%).
- Strict True Hydration Water
- 623gLocks True Total Hydration at 90.0% (target 90%, -7g)
- Unadjusted Apparent Water
- 630gPushes True Hydration to 90.9% (+0.9% surge)
- 20% Active Starter & Salt
- 140g / 15.4g70g hidden flour + 70g hidden water
- Stickiness & Rheology
- 5 / 5 StarsExtreme / Wet Handling (Extreme extensibility)
True (90.0%) vs Apparent (90.9%) Matrix for 700g Flour
Pre-computed gram weights around 700g main flour where 623g water locks True Total Hydration at 90.0% (target 90%).
| Batch & Seed Spec | Flour Breakdown | Levain Split | Corrected Water (90% Ref) | Salt & Dough Mass | Apparent vs Locked |
|---|---|---|---|---|---|
| 650g @ 88% (15% Seed) Lean Seed (-50g) | 650g + 49g = 699g (90%/700g ref) | 98g (49gF/49gW @ 100%) | 566g W (vs 572g app @ R1) | 14.0g salt (1314g dough) | 88.8% drift → 87.98% (88% goal) |
| 700g @ 88% (18% Seed) Low Inoc (-2% Hyd) | 700g + 70g = 770g (90%/700g ref) | 126g (70gF/56gW @ 80%) | 622g W (vs 616g app @ R2) | 15.4g salt (1448g dough) | 87.3% drift → 88.05% (88% goal) |
| 700g @ 90% (20% Seed) [Target Baseline] | 700g + 70g = 770g (90%/700g ref) | 140g (70gF/70gW @ 100%) | 623g W (vs 630g app @ R3) | 15.4g salt (1463g dough) | 90.9% drift → 90.0% (90% goal) |
| 700g @ 92% (22% Seed) High Inoc (+2% Hyd) | 700g + 77g = 777g (90%/700g ref) | 154g (77gF/77gW @ 100%) | 638g W (vs 644g app @ R4) | 15.5g salt (1492g dough) | 92.8% drift → 92.02% (92% goal) |
| 750g @ 92% (25% Seed) Scaled Batch (+50g) | 750g + 84g = 834g (90%/700g ref) | 188g (84gF/104gW @ 125%) | 663g W (vs 690g app @ R5) | 16.7g salt (1601g dough) | 95.2% drift → 91.97% (92% goal) |
Custom Batch Recalculation Engine
Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your hydration × flour weight formula ratios locked.
Bassinage Mechanics for 700g Flour at 90% Hydration (623g Water)
Mass-balance stoichiometry for 700g flour and 140g 1:1:1 levain tracks 70g pre-fermented starch and 70g free liquid across a 1478g batch. Leaving water at 630g inflates moisture to 90.9% (+0.9%), whereas 623g water (-7g) with 15.4g salt locks True Total Hydration at 90.0% (target 90%).
Capillary water binding across 770g total flour (700g + 70g) at 90.0% (90% target) leaves a 5/5 stickiness profile with extreme extensibility. Subtracting 7g water (623g vs 630g) and dosing 15.4g salt locks vertical oven spring in the 1478g loaf.
Execution Schedule: 700g Flour, 623g Water & 140g Starter (90.0%)
- Initial Water Binding (561g W on 700g F): Hydrate 700g flour using 561g water (leaving 62g for stage 2 of 623g) for 45 min.
- Levain & Salinity Lock (140g Starter + 15.4g Salt): Fold in 140g 100% starter and 15.4g salt with 62g water, avoiding 630g (90.9%) drift.
- Fold Cadence for 90% (5/5 Stickiness): Space 4 wet-hand tuck-and-folds across 2 hours to reinforce the 1478g (770g flour) network.
- Final Proof & Oven Spring (2-Loaf Batch): Cut bulk at +50% aliquot rise, cold-retard at 38°F overnight, and steam-bake in heavy cast iron at 450°F.
Technical Q&A: Extreme 90% Hydration Sourdough (700g Flour): 56
What is the total dough weight for 700g flour at 90% hydration?
Summing 700g main flour, 623g corrected water, 140g starter (70gF/70gW), and 15.4g salt yields 1478g of dough (2-Loaf Batch at 90.0%).
Why is salt 15.4g instead of 14g for 700g flour at 90%?
True 2.0% salinity counts the 70g flour inside your 140g starter (700g + 70g = 770g total flour × 2% = 15.4g salt), stabilizing the 1478g loaf at 90.0% (90%).
How sticky is a 700g flour sourdough at 90% hydration (623g water)?
At 90.0% (target 90%) with 623g water and 140g starter on 700g flour, rheology scores 5/5 stars (Extreme / Wet Handling) with extreme extensibility.