JAIC 2005, Volume 44, Number 2, Article 1 (pp. 63 to 74)
JAIC online
Journal of the American Institute for Conservation
JAIC 2005, Volume 44, Number 2, Article 1 (pp. 63 to 74)

A METHOD FOR THE AQUEOUS DEACIDIFICATION OF OXIDIZED PAPER

JOHN BOGAARD, HANNAH R. MORRIS, & PAUL M. WHITMORE


ABSTRACT—Concentrated aqueous solutions of pH-neutral salts were evaluated for their effectiveness at deacidifying photo-oxidized filter paper. Short immersions in these solutions successfully neutralized acidic paper sheets. However, subsequent rinses to remove excess salt were necessary to prevent yellowing upon thermal aging. Sheets treated with concentrated solutions of calcium chloride showed no significant chemical damage from the treatment and deteriorated more slowly during thermal aging compared with untreated sheets. Sample papers that were given a dilute alkaline rinse after the concentrated salt treatment degraded less upon thermal aging than papers treated with either solution alone. This method of neutral deacidification was also evaluated for use prior to chemical reduction of oxidized paper with sodium borohydride. A treatment procedure involving steps of deacidification, chemical reduction, and alkalization was found to greatly stabilize photo-oxidized papers against thermal aging, as well as to produce a bleaching effect.
[Spanish Abstract] [French Abstract]

Article Sections:

1. INTRODUCTION
2. EXPERIMENTAL APPROACH
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
a: Appendix , Notes , Materials , References , Author Information
Entire Article

Copyright 2005 American Institution for Conservation of Historic & Artistic Works