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Re: Leather consolidation



    Klucel-g, introduced to the conservation world by Mevrow Hoffenk de Graff from the then Central Research Laboratory in
Amsterdam, has been indeed object of  research by conservation chemists. Some results were published (Feller and Wilt: Evaluation of
Cellulose Ethers for Conservation, Getty Conservation Institute 1990), others not. In a personal comunication in 1988 at ICCROM  in
Rome, Mme Lilian Kleiner, then a teacher at the SPC course, warned us students against the use of Klucel g in view of  bad aging
under some conditions, including light.
    The point remains one: even good materials applied to historic artifacts in conditions different of those to which they were
designed or intended to may behave badly and add to degradation proccesses over time.
    The Dutch chemists developed research on the consolidation line, as well as English ones, each arriving to different
conclusions. Some advise epoxy resins, some polyurethane, some acrylics. None cellulose ethers for leather in bad conditions.
    Another interesting feature is the solvent carrier of the chosen resin: if the vapour pressure is to high, the solvent may
evaporate too quickly from the leather structure, carrying back to the surface some of the resin, with a result that may bring
delamination over time: too much on the surface and too litle inside.

         Claudius Schettini
Philobiblion Laboratorio di Restauro
 via San Cristofano 22/R - Firenze
    mail to: philobiblion@libero.it

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