Synthesizing lead white pigments by lead corrosion: New insights into the ancient manufacturing processes

Victor Gonzalez, Gilles Wallez*, Thomas Calligaro, Didier Gourier, Michel Menu

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    34 Citations (Scopus)

    Abstract

    Traditional “stack “manufacturing process (16–19th c.) of lead white pigment by lead corrosion is explored by exposing metal to acetic acid, carbon dioxide, dioxygen and water vapor. Global reaction scheme is revealed, along with stratification of corrosion products with CO2 gradient, leading to flakiness of corrosion layer. Kinetic and epitaxial features rule the polyphased structure, explaining hydrocerussite-rich compositions and absence of plumbonacrite in classical easel paintings. Microstructure of cerussite appears as a differentiation criterion between stack-made and industrial precipitation-synthesized lead whites. Particular conditions reported in ancient writings are tested and discussed to understand unusual processes.

    Original languageEnglish
    Pages (from-to)10-17
    JournalCorrosion Science
    Volume146
    DOIs
    Publication statusPublished - 2019

    Keywords

    • A. Lead white
    • B. X-ray diffraction
    • C. Carbonation
    • C. Cultural heritage materials
    • C. Pigment

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