[Nhcoll-l] White crystals on plastinated tissue

[Vicen Carrio]

Hi,

It would help if you could put some images?

Vicen

Ms Vicen Carrió ACR
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National Museums Scotland
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From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Rebecca Newberry
Sent: 11 October 2017 16:58
To: NHCOLL-L
Subject: [Nhcoll-l] White crystals on plastinated tissue

We are noticing some white crystal like growth on plastinated human body parts on display.  The objects are sealed in small acrylic vitrines in a gallery which experiences seasonal RH shifts (down to 20% in the winter and up to 60% in the summer) and relatively stable temperature around 70F.
The worst growth is on a rib with cartilage attached.  There is also growth on a plastinated heart.
The tissues were prepared at the University of Michigan 15-20 years ago, presumably with silicone.
Has anyone had an issue like this? I plan to clean it off with water dampened swabs, but I'd like to see if there is a way to prevent it from happening again.
Thanks,
Rebecca

Rebecca Newberry
Conservator
Science Museum of Minnesota
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St. Paul, MN 55102
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