pH of paper

In Cons Distlist Instance 8:38 Jim Druzik indicated that narrow-range
indicator strips may be adequate to identify acidic paper. In a
comparative study of a four extraction and four surface methods of
determining pH carried out at the National Library of Australia a few
years ago we found that indicator strips were inaccurate and unreliable.
The results of this study were published.  See Brandis, L. (1993),
Bulletin Australian Institute for the Conservation of Cultural Material,
Vol 18(3/4), pp7-17.

Jan Lyall
National Preservation Office
National Library of Australia
+61 6 262 1571
Fax: +61 6 257 1703

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                  Conservation DistList Instance 8:40
                Distributed: Tuesday, November 29, 1994
                        Message Id: cdl-8-40-003
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