Paper damaged by copper pigments

I have a French atlas (Le Neptun Francois Atlas nouveau des cartes
maritimes, levees et gravees par ordre expres du roy pour usage de
ses armees de mer, pris chez Hubert Jaillot aux deux Globes, 1693)
with a lot of copper corrosion problems. Some areas have heavy tears
and fragments which fall out.

I wonder whether there are any new methods to tackle this kind of
corrosion problem. I do not want to use Klucel  since it is not
ageproof and needs to be prepared very viscous in order to have
enough tack which again has other drawbacks. I would like to back
the degraded parts with buffered Japanese paper (a bath of
magnesiumcarbonate). Backing the copper corroded parts with Japanese
paper and paste as adhesive is not advised because of its water
content which might accelerate the copper corrosion. Methylcellulose
diluted in a solvent which does not evaporate too quickly could be
used but might lead to solvent staining in the paper.

The treatment needs to be executed on the bound book. The atlas has
a nice parchment binding which requires only minor repairs. Who has
experience in the treatment of copper corrosion and could give me
some advice?

Martin Strebel
Atelier fur Buch- und Papierrestaurierung
Bahnhofstrasse 15
5502 Hunzenschwil
+41 62 8973970
Fax: +41 62 8970046


                                  ***
                  Conservation DistList Instance 15:22
               Distributed: Wednesday, September 5, 2001
                       Message Id: cdl-15-22-010
                                  ***