Papers are used as carrier of documents, recording knowledge by writing, printing, etc. Its durability is an important issue requiring our close attention. The main factor affecting papers'durability is acid, which makes papers brittle, yellow or dark, with significantly lower mechanical strength, unable to flip over in a more serious condition, even broken to scraps. Deacidification of acidulated documents is one of the primary problems of protection and restoration of paper documents.
In this paper, ...