Effect of Some Deacidification Agents on Copper-Catalyzed Degradation of Paper
Experimental Description
PART 1 - PART 2
Paper samples were 8" x 10" (20.3 cm x 25.4 cm) sheets cut from a continuous length of a single machine-made roll of bleached Kraft (50 lb [22.7 kg] basis weight). It was made by Neenah Paper Mills, Neenah, Wisconsin, from a wood-pulp stock composed of northern softwoods (60%) and Lake States hardwoods (40%). This paper was essentially waterleaf, as no additives were introduced in its manufacture.
All chemicals employed were analytical reagent grade, except where noted. Water used for washing paper samples and the preparation of chemical solutions had a minimum resistivity of 15 Megohm.
In all procedures described below, paper samples wcre interleaved with fibrous sheets of nonwoven polyester to facilitate penetration of solution between adjacent samples and to provide physical support for wet paper during its re- moval from a treatment bath. Plastic trays were used for all chemical treatment and washing operations. Generally, 1 liter of solution was used for every 10 sheets of paper.
Paper samples were immersed in a dilute (104 mol/l) aqueous solution
of copper sulfate for 16 to 18 hours. Intermittent agitation was provided
during the first few hours of treatment. At the end of the treatment
period, the paper samples were transferred to a water bath. The water
was changed several times until the conductivity of the wash water in
contact with the paper samples was
under 10 µS (microhm).
Table of Contents - Introduction - Experimental Description - Testing and Analysis - Results and Discussion - References - Supporting Documents