[Nhcoll-l] Heatsealer

Thu Jan 21 09:45:12 EST 2021

Lennart,

For large barrier film enclosures a rotary heat sealer like this is an expensive but valuable tool - https://www.staplerwarehouse.com/product/6819/packrite-hrs-hand-rotary-sealer  that will save your hand from the manual crimper.  But a regular house iron will also do in many circumstances.

Rachael Perkins Arenstein

A.M. Art Conservation, LLC

Conservation Treatment, Preservation Consulting & Collection Management

Tel: 917-796-1764 (she/her/hers)

 <http://www.amartconservation.com/> www.amartconservation.com

 <mailto:rachael at amartconservation.com> rachael at amartconservation.com

From: Lennart Lennuk <Lennart.Lennuk at loodusmuuseum.ee> 
Sent: Thursday, January 21, 2021 9:34 AM
To: Mariana Di Giacomo <maru.digi at gmail.com>; Anderson, Gretchen <AndersonG at carnegiemnh.org>
Cc: rachael at amartconservation.com; nhcoll-l at mailman.yale.edu
Subject: RE: [Nhcoll-l] Heatsealer

Thank you Gretchen and Mariana.

Mariana – do you also use it to seal bigger plastic bags?

Or is better to usa a bigger heatsealer for bigger bags?

Best!
Lennart

From: Mariana Di Giacomo [mailto:maru.digi at gmail.com] 
Sent: Thursday, January 21, 2021 4:14 PM
To: Anderson, Gretchen <AndersonG at carnegiemnh.org <mailto:AndersonG at carnegiemnh.org> >
Cc: Lennart Lennuk <Lennart.Lennuk at loodusmuuseum.ee <mailto:Lennart.Lennuk at loodusmuuseum.ee> >; rachael at amartconservation.com <mailto:rachael at amartconservation.com> ; nhcoll-l at mailman.yale.edu <mailto:nhcoll-l at mailman.yale.edu> 
Subject: Re: [Nhcoll-l] Heatsealer

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 <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> &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 <mailto: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 <mailto: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 <mailto: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 <mailto:maru.digi at gmail.com> ] 
Sent: Wednesday, January 20, 2021 6:17 PM
To: rachael at amartconservation.com <mailto:rachael at amartconservation.com> 
Cc: Lennart Lennuk <Lennart.Lennuk at loodusmuuseum.ee <mailto:Lennart.Lennuk at loodusmuuseum.ee> >; Nhcoll-l at mailman.yale.edu <mailto: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 <mailto: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 <mailto:rachael at amartconservation.com> 

From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu <mailto: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 <mailto: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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