Conservation de manuscrits altérés par les encres ferrogalliques: faisabilité d’un traitement antioxydant par contact en milieu humide

Veronique Rouchon, Maroussia Duranton, Oulfa Belhadj, Neilly Cauliez, Olivier Joly, Charlotte Walbert, Birgit Vinther Hansen

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    Abstrakt

    Current treatments proposed to limit iron gall ink damages require the
    immersion of the document in aqueous anti-oxidant solutions, and thus
    present undesirable side effects. This work deals with the possibility of
    replacing these treatments by interleaving treatments performed with
    anti-oxidant charged papers. Interleaving treatment consists in pressing
    the document between two interleaves, at ambient temperature and in
    high humidity conditions in order to provoke the migration of active
    components from the interleaves to the document. The use of high humidity
    conditions may provoke a migration of ink components from the ink
    line to the paper which is prejudicial to the future conservation of the
    document. Tests, performed on a set of 53 original manuscripts, led us
    consider that a relative humidity of 80% was minimizing this risk. The efficiency
    of interleaving treatment was then evaluated on laboratory
    samples made of Whatman paper impregnated with iron gall ink. Interleaves
    charged with halide salts (NaCl, NaBr, CaCl2, CaBr2) and/or
    calcium carbonate were investigated. An alkaline reserve of 2% calcium
    carbonate in the interleaves does not impact the treatment efficiency,
    which is mainly dependant upon the concentration of anti-oxidant, the
    pressure and the duration of the treatment.
    OriginalsprogFransk
    Publikationsdato31 dec. 2013
    Antal sider5
    StatusUdgivet - 31 dec. 2013

    Emneord

    • jerngallusblæk, haldier, mellemlæg, fugt, konservering

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