🍞SourdoughCalc
Flour Brand Γ— Absorption BenchmarkPre-Computed Lab Matrix β€’ Day 2

Rescuing Over-Hydrated King Arthur Bread Flour (12.7% Protein) at 82% (+5g VWG vs 80% Cap)

Over-ceiling rescue for King Arthur Unbleached Bread Flour (0.52% ash) when 82% (401g water) exceeds its 80% limit by 2%.

Instant Lab Reference Verdict (Flour Brand Γ— Absorption Benchmark)

With 12.7% protein and 0.52% ash (US Hard Red Winter/Spring), King Arthur Unbleached Bread Flour handles 72%–77% effortlessly and caps at 80%β€”scoring a 82% build as [OVER CEILING (+2% Above Limit)]. Measuring 401g main water, 100g active culture, and 11g salt for 500g King Arthur Bread Flour locks True Total Hydration at 82.0% (target 82%) instead of 83.6%.

Absorption Status
OVER82% Target vs. 80% Max Ceiling
Flour Protein & Ash
12.7% / 0.52%US Hard Red Winter/Spring
500g Batch Main Water
401gWith 100g starter, locks True Total Hydration at 82.0% (target 82%)
Optimal Sweet Spot
72%–77%Add 5g Vital Wheat Gluten at 82%

True (82.0%) Water & VWG Rescue Matrix for King Arthur Bread Flour (0.52% Ash)

Pre-computed 400g–625g batch weights for King Arthur Bread Flour at 82% (401g water / 82.0%), benchmarked against King Arthur All-Purpose Flour (72% max).

King Arthur Bread Flour Hydration StepCorrected Water (82% Ref)Protein, Ash & Sweet SpotBenchmark Flour ComparisonCeiling Margin & Rescue
400g King Arthur Bread Flour @ 77% Base (-5%)299g W + 80g levain + 8.8g salt (440g totF / 82% grid)12.7% prot / 0.52% ash (sweet 72–77%)vs King Arthur All-Purpose Flour (72% max / 268g W)+3% buffer vs 80% cap (R1/82%)
450g King Arthur Bread Flour @ 80% Tight (-2%)351g W + 90g levain + 9.9g salt (495g totF / 82% grid)12.7% prot / 0.52% ash (sweet 72–77%)vs Central Milling ABC+ Flour (77% max / 326g W)+0% buffer vs 80% cap (R2/82%)
500g King Arthur Bread Flour @ 82% [Bench Target]401g W + 100g levain + 11.0g salt (550g totF / 82% grid)12.7% prot / 0.52% ash (sweet 72–77%)vs King Arthur All-Purpose Flour (72% max / 335g W)+5g VWG rescue for King Arthur Bread Flour @ 82%
600g King Arthur Bread Flour @ 85% Open (+3%)501g W + 120g levain + 13.2g salt (660g totF / 82% grid)12.7% prot / 0.52% ash (sweet 72–77%)vs Central Milling ABC+ Flour (77% max / 435g W)+15g VWG rescue for King Arthur Bread Flour @ 85%
700g King Arthur Bread Flour @ 80% [Saturation]546g W + 140g levain + 15.4g salt (770g totF / 82% grid)12.7% prot / 0.52% ash (sweet 72–77%)vs King Arthur All-Purpose Flour (72% max / 469g W)+0% buffer vs 80% cap (R5/82%)

Dynamic Stoichiometric Workbench (OVER)

Test custom loaf weights or alternative fermentation schedules directly against the 12.7% / 0.52% benchmark above.

Open Fullscreen Solver β†’
Absorption Status:
OVER β€” 82% Target vs. 80% Max Ceiling
Flour Protein & Ash:
12.7% / 0.52% β€” US Hard Red Winter/Spring
500g Batch Main Water:
401g β€” With 100g starter, locks True Total Hydration at 82.0% (target 82%)

Why King Arthur Bread Flour (12.7% Protein) Slumps at 82% (+2% Over 80% Cap)

King Arthur Unbleached Bread Flour (12.7% protein, 0.52% ash) is roller-milled for 82% (401g water) sourdough from unmalted US Hard Red wheat with high Alveograph P/L tenacity (82.0% true hydration). With zero malted barley amylase across a 361g autolyse and 40g bassinage, its starch resists liquefaction vs 410g (83.6%). Calibrating 500g King Arthur Bread Flour to 82% (82.0%) via 401g water (-9g deduction from 410g) preserves 72%–77% crumb elasticity.

PAN-PROOF OR FORTIFY (82% > 80% Cap): On 500g King Arthur Bread Flour (12.7% protein, US Hard Red Winter/Spring), 401g main water locks 82.0% (82%) yet leaves 11g unbound water (+2% over cap). Add 5g VWG, pan-bake as focaccia, or use 390g water.

Handling King Arthur Bread Flour (12.7% Protein / 0.52% Ash) at 82.0% (82%)

  1. Endosperm Swelling (King Arthur Bread Flour / 12.7% Prot): Combine 500g King Arthur Bread Flour and 361g water (72% soak) for 45 min.
  2. True-82% Calibration (401g W + 100g Levain): Incorporate 100g ripe culture, 11g salt, and 40g reserved water across 550g total flour (82.0%).
  3. Lamination & Coil Cadence (0.52% Ash): Perform 1 bench lamination and 3 coil folds at 30-min intervals on your 82% King Arthur Bread Flour dough.
  4. Overnight 38Β°F Retardation: Arrest fermentation at +50% rise, stitch in a breathable liner, chill 14 hrs, and bake 20m covered + 22m uncovered.

Key Baker's Math Questions (Absorption Status: OVER)

Can I use King Arthur Bread Flour at 82% in a Tartine-style sourdough recipe?

Yesβ€”King Arthur Bread Flour (12.7% protein, 80% cap) supports 82% when 401g water (361g + 40g) locks 82.0% with 100g starter.

How much water do I need for 500g of King Arthur Bread Flour at 82% hydration?

With 500g King Arthur Bread Flour and 100g active 100% starter, weigh 401g main water (361g autolyse + 40g bassinage) and 11g salt to lock 82.0% (82%) instead of 410g (83.6%).

How much water should I hold back for bassinage with 500g King Arthur Bread Flour at 82%?

Out of 401g corrected water for 500g King Arthur Bread Flour at 82% (82.0%), mix 361g (90%) during the autolyse and trickle in 40g (10%) with 100g starter and 11g salt.

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