Mass Conservation of Paper: A Comparison of Methods

Abstract

The rate of deterioration of printed paper has grown to a point where conventional conservation methods can no longer cope with either the volume or the cost. In response to this problem, several mass conservation methods have been developed: treatment with diethylzinc, methoxy magnesium methyl carbonate, magnesium oxide, ammonia, cyclohexylamine, and ethanolamine; polymerization by ethyl acrylate; and strengthening with cellulose. Some processes are still at the pilot stage. Methods vary in complexity, and some require very large plants. A comparison of them shows that no process meets all the ideal criteria. Disadvantages include fire or health hazards, and detrimental effects on ink or leather. Some methods deacidify the paper without reinforcing it. Treatment varies between 5 and 72 hours, and the cost ranges from 30 cents a book to $15, but the latter partly depends on the state of development of the process.