Cast, Not Carved · claim GEO-C535 · Mechanism rung · Recipes and replication experiments
An open-air replication of the proposed Rekhmire method — natron held on a granite slab, charcoal with forced air bringing the surface to ~851 °C — produced thorough granite etching, with ~106 g natron yielding ~122 g dry waterglass.
source anchor
Fóti Ch 4, pp ~125–128
Evidence
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an honest empty state
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