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Permanent, compound transfer from

In consideration of the damage of paper by liquids (solvents) as well as the limitation and effectiveness of transfer chemicals into the fibers, deacidification by gas has been devised. Although there are a great many volatile organic compounds which appear to be sufficient alkaline for vapor-phase deacidification, only a very few appear to be practical. Kathpalia (35), at the Nehru Library in New Delhi, exposed books to high concentrations of amnonia vapor for deacidification. However, it was found that amnonia is a too weak base to completely neutralize strong acid in paper, and amnonia volatilized from treated books in a few days. It has not been considered as a permanent deacidification method. [Pg.20]

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