[Nhcoll-l] Sleeves for Lepidopterans

[Chris Grinter]

This paper discusses the storage technique, but I agree with Doug—much of
the glassine I've seen used in collections is not archival. I've picked up
envelopes and had them crumble, or they are yellowed and have wicked oils
from specimens. I think applying Odonata standards (clear poly bagging) is
superior.

Chris

*Christopher C. Grinter*
Collection Manager of Entomology
President, Entomological Collections Network
Assistant Secretary & Asst. Treasurer, The Lepidopterists’ Society
California Academy of Sciences
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On Thu, Jul 1, 2021 at 5:26 PM Douglas Yanega <dyanega at gmail.com> wrote:

> On 7/1/21 1:04 PM, Menard, Katrina wrote:
> > Hi all,
> >
> > I was curious whether there are collections out there that store
> > sleeved lepidopteran material (like Odonata). We have a large amount
> > of butterflies that are stored in paper and glassine envelopes that
> > would take several lifetimes to spread, and we neither have the time
> > nor space to go that route. We like the idea of glassine sleeves as a
> > more permanent and protective way to store our enveloped material, but
> > wanted more input from the community on this.
> >
> We have plenty of odonates in glassines in our collection, but these
> appear to be some sort of plastic, and are therefore very different from
> the glassines used for leps. I suspect there may be issues surrounding
> the archival properties of the latter, especially since paper may be
> acidic. We do have some very old papered leps (in both plain paper and
> glassines), and I see signs that there may be chemical interactions
> taking place; if you dump a lep out of a very old glassine, there is
> often a visible "stain" where the specimen was, and it's not just the
> body. These old glassines are also distinctly yellowed. It's reason to
> be suspicious, at least.
>
> Peace,
>
> --
> Doug Yanega      Dept. of Entomology       Entomology Research Museum
> Univ. of California, Riverside, CA 92521-0314     skype: dyanega
> phone: (951) 827-4315 (disclaimer: opinions are mine, not UCR's)
>
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