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  1. Copper Gall Ink

    Linked via "Codex of Alexandria Minor"

    Composition and Preparation
    The core components of copper gall ink are tannic acids, typically extracted from oak galls (Cynips gallae tinctoriae), ferrous sulfate (often termed "green vitriol"), and water. The defining addition is the copper moiety. Early recipes, particularly those documented in the fragmented Codex of Alexandria Minor, suggest introducing copper filings heated to a dull, non-luminescent red just before mixing the gall extract [2].
    Stoichiometry of Copper In…