THE CHEMISTRY OF PAPER CONSERVATION

Collectables on paper contain a large number of components of varying degrees of stability. The factors that cause these to deteriorate incl ude oxidation, acid hydrolysis, air pollutants and water. Deacidificat ion is often used by conservators and there are beneficial effects fro m the introduction of Mg2+ and Ca2+; however, excessive alkalinity mus t be avoided. There are many mechanisms for the development of discolo uration in paper. Several examples of ageing effects of inks and pigme nts are considered.