National Library of France
For more info
sur la désacidification de masse [fichier .pdf – 315 Ko – 14/10/09 – 24 p.] in Actualités de la conservation, n° 22-23, janvier-juin 2005
Preservation and expertise at BnF
The Preservation Division offers services for external institutions, libraries and archives, as part of its various production activities.
In cooperation with the Centre de recherche sur la conservation des collections – CRCC (formerly the Centre national de la recherche sur la conservation des documents graphiques – CRCDG), BnF has adapted an existing process which makes it possible to neutralize acid in the paper; a desacidification unit was then settled at the Sablé Center. Batches of 100 to 200 volumes are treated in a vacuum chamber where they are first dehydrated (paper moisture is brought back to 0,5%) before being immersed in an aqueous solution composed of freon (90%) and magnesium ethoxide under pressure. 25,000 to 30,000 volumes a year can be treated in the desacidification unit.
21 euros (excl. tax) per kilogrammes of material (insurance and transportation not included)
The minimum order is fifty kilogrammes of material.
Annie Bonnaud - Directrice
Alain Lefebvre - Expert chimiste
Thursday, May 12, 2011