Cast, Not Carved · claim GEO-C525 · Mechanism rung · Recipes and replication experiments
Mixing carbonated old wood ash with fresh CaO-bearing ash and water yields artificial limestone (CaO + K₂CO₃ + H₂O → CaCO₃ + KOH) that hardens within ~24 hours once the lye byproduct is neutralized or pressed out.
source anchor
Fóti Ch 3, pp ~96–98
Evidence
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an honest empty state
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