[Nhcoll-l] Heatsealer

Thu Jan 21 09:14:24 EST 2021

Adding to what Gretchen was saying, I'd recommend you check this website:
https://museumpests.net/ for many of these questions, and to also join the
list serve to get better answers about specific pest issues.

Now, about the heat sealer, we use this one to seal the Marvelseal, if I'm
not mistaken:
https://www.uline.com/Product/Detail/H-1069/Poly-Bag-Sealers/Crimper-Hand-Sealer-6?pricode=WA9053&gadtype=pla&id=H-1069&gclid=CjwKCAiA6aSABhApEiwA6Cbm_15tkrJRC4tpC_8FQJyNKCq8WOryVBpaUpqdfOFvKDVPaWcLOYecOhoCsT0QAvD_BwE&gclsrc=aw.ds

Best,
Mariana

*Mariana Di Giacomo, PhD*
*Natural History Conservator, Yale Peabody Museum*
Co-chair, Emerging Professionals Committee, SPNHC
Associate Editor, Collection Forum, SPNHC
Secretary/Communications APOYOnline

El jue, 21 ene 2021 a las 9:05, Anderson, Gretchen (<
AndersonG at carnegiemnh.org>) escribió:

> Hi again Lennart,
>
> We freeze herbarium sheets at -20 C.   Length of time is usually a week or
> two, just to be sure of the death rate. The sheets are wrapped in two
> layers of plastic (or two polyethylene trash bags(clear) for the reasons in
> my last email. We do a single freeze.  A double freeze as you described
> puts the specimens at greater risk and is no more effective at killing
> insects. In fact a double freeze can encourage the pest to develop freeze
> resistance.
>
> Hope this helps.
> Gretchen
>
> Sent from my iPhone
>
> On Jan 21, 2021, at 7:52 AM, Anderson, Gretchen <AndersonG at carnegiemnh.org>
> wrote:
>
>  To add to what Marianna and Rachael said- put 2 layers of plastic over
> the specimens, if possible. The plastic is there to 1) eliminate stress
> from change in Relative humidity and the shock of losing moisture in the
> specimen &2) prevent condensation after on the specimen.
>
> Gretchen Anderson
> Conservator
> CMNH
>
> Sent from my iPhone
>
> On Jan 21, 2021, at 1:45 AM, Lennart Lennuk <
> Lennart.Lennuk at loodusmuuseum.ee> wrote:
>
> 
>
> Hi!
>
>
>
> Thank you a lot. This has been great help!
>
>
>
> I believe I plan also some low-ogygen treatments. So what kind on
> heat-sealer to use and does it need 3-phase electricity?
>
>
> Best!
> Lennart
>
>
>
> *From:* Mariana Di Giacomo [mailto:maru.digi at gmail.com]
> *Sent:* Wednesday, January 20, 2021 6:17 PM
> *To:* rachael at amartconservation.com
> *Cc:* Lennart Lennuk <Lennart.Lennuk at loodusmuuseum.ee>;
> Nhcoll-l at mailman.yale.edu
> *Subject:* Re: [Nhcoll-l] Heatsealer
>
>
>
> Hi Lennart,
>
>
>
> I have to second Rachael's comments. Make sure you are not leaving any
> holes while you are doing the taping and the specimens will be well
> protected before going into the freezer. The difference between freezer and
> low oxygen in this sense is that in both cases if you see the hole, it's a
> problem, but microholes are a problem for low-oxygen but not an issue for
> freezing, so heat sealing is not necessary.
>
>
>
> Best,
>
> Mariana
>
>
> *Mariana Di Giacomo, PhD*
>
> *Natural History Conservator, Yale Peabody Museum*
>
> Co-chair, Emerging Professionals Committee, SPNHC
>
> Associate Editor, Collection Forum, SPNHC
>
> Secretary/Communications APOYOnline
>
>
>
>
>
>
>
> El mié, 20 ene 2021 a las 9:52, <rachael at amartconservation.com> escribió:
>
> Hello Lennart,
>
> Obviously I cannot speak for anyone else, but the majority of colleagues I
> know who freeze specimens as a remedial pest measure wrap them in
> polyethylene plastic that is secured with packing tape rather than sealed
> with a heat sealer.  I know that some people have investigated which tapes
> do well in low-temperatures, but I have found that most good quality
> packing tapes will survive the process and keep the plastic sheeting in
> place.  This is in contrast, of course, to low-oxygen treatments where a
> good seal for the barrier films require a heat sealer of some type.
>
> Sincerely,
>
> Rachael
>
>
>
>
>
> Rachael Perkins Arenstein
>
> A.M. Art Conservation, LLC
>
> Conservation Treatment, Preservation Consulting & Collection Management
>
> Tel: 917-796-1764 (she/her/hers)
>
> www.amartconservation.com
> <https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.amartconservation.com%2f&c=E,1,g8GJFg2AoaNyTgAIIVIwMCbhBKPjkCbTt54JPmzrTt4PRqFA4Kn3bbJyp5OGZT9tAqKkQ-gooZ0DnIeAyxqovDhtf1mEPYi4omqlPGlNsw,,&typo=1>
>
> rachael at amartconservation.com
>
>
>
> *From:* Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> *On Behalf Of *Lennart
> Lennuk
> *Sent:* Wednesday, January 20, 2021 3:51 AM
> *To:* nhcoll-l at mailman.yale.edu
> *Subject:* [Nhcoll-l] Heatsealer
>
>
>
> Hello!
>
>
>
> What kind of heatsealers you use for sealing stuffed animals before
> sending them to freezers (getting rid of pests for example)?
>
> Does the heatsealer need three-phase electricity?
>
>
>
> Head!
> Lennart
>
>
>
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