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Subject:
Drawing pens
From:
Andrew Grebneff <[log in to unmask]>
Reply To:
Conchologists of America List <[log in to unmask]>
Date:
Fri, 19 Nov 1999 10:25:04 +1300
Content-Type:
text/plain
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If the surface you are writing on is firm you should have no trouble with
clogging nibs on Faber Castell or Rotring Rapidographs. Slightly chalky
shells are a problem, and should be consolidated with polyvinylbutyral
(PVB) plastic dissolved in  highish-grade ethanol or acetone. Hoechst
Mowital B60HH is probably best; also sold under brand name Butvar. These
should be available from scientific suppliers.

Andrew G

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