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There are a couple of solutions available to dispense with the plague of
seldom-used rapidographs.  Many museums use a crow-quill (an
old-fashioned metal quill or other tip for calligraphy) instead of a
mechanical drawing pen.  You also might find a "felt tip" type marker
that used ink that was insoluble in the solvents used in Soluvar, but
you'd have to do some testing on a surface other than your objects.  Let
the ink dry thoroughly, and try a coating layer of Soluvar.  It either
will or won't smear the ink. Unfortunately the light-fastness of marker
inks is not well documented, and you wouldn't know what aging properties
they'd have in the long run. I'd go with the standard quill pen and
india ink.

Karen Motylewski
Northeast Document Conservation Center

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                  Conservation DistList Instance 6:59
                   Distributed: Friday, May 14, 1993
                        Message Id: cdl-6-59-003
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