[Nhcoll-l] Aged Shellac

[Paul Callomon]

Hi Angie,

What kind of specimens?

PC

Paul Callomon
Collections Manager in Malacology, Invertebrate Paleontology and General Invertebrates
The Academy of Natural Sciences of Drexel University
1900 Benjamin Franklin Parkway
Philadelphia, PA  19103
callomon at ansp.org
Tel. 215-405-5096
ansp.org
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From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of angie thompson
Sent: Tuesday, January 29, 2013 10:15 AM
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] Aged Shellac


Hi all
I'm looking at removing some very old 'shellac' from specimens. The shellac is about 80-100 yrs old, and has turned dark amber. This collection of specimens were covered in resin mix of  sandrac and copal. In some cases, we're seeing the shellac get brittle and fracture, damaging the surface underneath it.  Has anyone has success at aged shellac removal?
Thanks
Angie Thompson
UT
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