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Hi Todd Regarding the thickness of the plastic wrap/bags, thicker garbage bags/sheet plastic is used mainly as it is stronger when handling and there is less moisture transmission through the film than with thinner films. As a rough guide - disposable shopping bags/bin liners are about 1ml (you should double bag if using this type) - ziplock-style sandwich bags are about 2ml (and some have a moisture barrier layer) - 'tough' garbage/garden refuse bags may be 4-6ml. Many of these types of bags have reinforced layers that adds to their strength. You're not creating an oxygen barrier so holes and tears aren't such an issue. If you find scrapes or tears just repair them with tape. One more thing. When you're freezing a lot of items you may find water building-up under and between bags of frozen items. You can reduce this by using fans to keep air moving over the objects post freezing. Best wishes Alex On Thu, 9 Nov 2017 at 7:53 am, Todd Holmberg <tholmb...@artsmia.org> wrote: > This is a message from the Museumpests.net List. > To post to this list send it as an email to pestlist@museumpests.net > To unsubscribe look at the footer of this email. > ----------------------------------------------------------- > Hello Everyone, > > Good thread- very informative. > > Since the topic of freezing is going on here, I was wondering if I could > pick your brains on a few things. Hopefully this doesn't take us to far > off topic. > > 1) Does anyone here have strong opinions about the mil of plastic used in > freezing treatments? Is there a good "go to mil" that you like > for freezing bags? Is the only downside to a thinner mil its greater > likelihood of tearing, or does it have a less desirable affect in other > aspects of freezing too? > > 2) How big of a problem is it, when loading a freezer, if a small scuff > is made in the plastic? If there is any hole/scuff in the plastic membrane > (even a small fraction of an inch) does that compromise the object > inside? If the scuff is made only on the outer bag, and it is "double > bagged", does that outer bag need to be taken off and "re-bagged"? > > If anyone has opinions on these issues I would appreciate your feedback. > > Thanks! > Todd Holmberg > Collection Maintenance Technician > Minneapolis Institute of Art > > On Wed, Nov 8, 2017 at 2:13 PM, Hazra Medica <hazra.med...@ab.gov.ag> > wrote: > >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> Excellent idea, Joel! Will save so me much time and tears. >> >> >> Many thanks. >> >> >> *Hazra C. Medica* >> >> >> >> *Advisor/Consultant on Cultural Matters Ministry of Trade, Industry, >> Commerce & Consumer Affairs Ministry of Sports, Culture & National >> Festivals St. John's Antigua W.I.* >> >> >> ------------------------------ >> *From:* pestlist-ow...@museumpests.net <pestlist-ow...@museumpests.net> >> on behalf of Voron, Joel <jvo...@cwf.org> >> *Sent:* Wednesday, 08 November 2017 09:09:25 >> >> *To:* pestlist@museumpests.net >> *Subject:* Re: [pestlist] Suggestions re solutions for termite >> infestation in the tropics >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> If you can make a small breech in the wrap without risking the pieces >> you could get the desiccant packets in without the hassle of unwrapping >> them and just tape up the slit. JTV >> >> >> *Joel Voron **Colonial Williamsburg Foundation* >> >> Conservation Dept. >> >> Integrated Pest Management >> >> Office 757-220-7080 <(757)%20220-7080> >> >> Cell 757-634-1175 <(757)%20634-1175> >> >> E-Mail jvo...@cwf.org >> >> >> [image: 1474552137245_IMG_0499.JPG] >> >> >> >> ------------------------------ >> *From:* pestlist-ow...@museumpests.net <pestlist-ow...@museumpests.net> >> on behalf of Hazra Medica <hazra.med...@ab.gov.ag> >> *Sent:* Wednesday, November 8, 2017 8:02:39 AM >> *To:* pestlist@museumpests.net >> *Subject:* Re: [pestlist] Suggestions re solutions for termite >> infestation in the tropics >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> Joel, >> >> >> Thank you for this bit of information. I'll unwrap and re-wrap with the >> necessary precautions to avoid causing any unnecessary harm. >> >> >> Best regards. >> >> >> *Hazra C. Medica* >> >> >> >> *Advisor/Consultant on Cultural Matters Ministry of Trade, Industry, >> Commerce & Consumer Affairs Ministry of Sports, Culture & National >> Festivals St. John's, Antigua W.I.* >> >> >> ------------------------------ >> *From:* pestlist-ow...@museumpests.net <pestlist-ow...@museumpests.net> >> on behalf of Voron, Joel <jvo...@cwf.org> >> *Sent:* Wednesday, 08 November 2017 06:31:25 >> *To:* pestlist@museumpests.net >> *Subject:* Re: [pestlist] Suggestions re solutions for termite >> infestation in the tropics >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> If the RH inside the bags is 30% to 50% mold should not be an issue. >> Usually 60% and above is where you run into problems. JTV >> >> >> >> >> >> Joel Voron Colonial Williamsburg Foundation >> >> Conservation Dept. >> >> Integrated Pest Management >> >> Office 757-220-7080 >> >> Cell 757-634-1175 >> >> E-Mail jvo...@cwf.org >> >> >> >> >> >> >> On Nov 7, 2017, at 5:25 PM, Hazra Medica <hazra.med...@ab.gov.ag> wrote: >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> Hi Alex, >> >> >> Thank you so much for taking the time out to respond to my questions. >> I've indeed been thinking freezing might be my best option. I do have >> another question given your mention of the risk of mould. How long is it >> safe to have these items bagged/wrapped tightly in plastic before we >> subject them to freezing? I am trying my best to move rather quickly with >> this project but sometimes things go slow. >> >> >> Best regards. >> >> >> Hazra Medica >> >> *Advisor/Consultant on Cultural Matters* >> >> >> *Ministry of Trade, Industry, Commerce & Consumer Affairs Ministry of >> Sports, Culture & National Festivals St. John's, Antigua W.I.* >> >> >> >> ------------------------------ >> *From:* pestlist-ow...@museumpests.net <pestlist-ow...@museumpests.net> >> on behalf of Alex Roach <alexro...@modifiedatmospheres.com.au> >> *Sent:* Monday, 06 November 2017 20:31:30 >> *To:* pestlist@museumpests.net >> *Subject:* Re: [pestlist] Suggestions re solutions for termite >> infestation in the tropics >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> Hi Hazra >> Bagging infested/suspect materials and freezing will be a great approach >> for treatment of the items. >> Storing the (treated) materials up off the floor post freezing (i.e. on >> blocks or tables) will enable you to keep an eye out for further termite >> attack. >> If you're dealing with drywood termites then even small wooden items can >> contain colonies, but again freezing would be a suitable approach (assuming >> items won't be damaged by freezing). >> You could go down the low oxygen path for treatment, but it's much more >> expensive. One large bag could be used to treat the entire collection, or >> you could make several smaller bags. The small bag approach provides you >> with a stable storage environment for the collection while you work through >> cataloging, etc. Another major advantage is that you won't be facing a >> mould problem when it comes time to open the bags (a real risk when leaving >> items bagged in pe in poor conditions). >> As for treatment of the termite infestation (if you're looking at staying >> in the same building) it will depend upon the species of termite that is >> attacking, building type and other factors. Assuming that they're >> subterranean termites then baiting may be suitable as it will allow you to >> destroy the colony, but you may also be able to locate and destroy the nest >> directly. >> Best wishes >> Alex >> >> On Tue, 7 Nov 2017 at 2:11 am, Hazra Medica <hazra.med...@ab.gov.ag> >> wrote: >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> Thank you so much for that note, Joel. Admittedly, my main goal right >> now is attempting to ensure that we're left with something to preserve >> until I get the "go ahead" to have the items removed and the suitable >> expert brought in to safeguard this very valuable collection. >> >> >> *Hazra C. Medica* >> >> >> >> *Advisor/Consultant on Cultural Matters Ministry of Trade, Industry, >> Commerce & Consumer Affairs Ministry of Sports, Culture & National >> Festivals St. John's, Antigua W.I.* >> >> >> >> ------------------------------ >> *From:* Voron, Joel <jvo...@cwf.org> >> *Sent:* Monday, 06 November 2017 10:20:56 >> *To:* Hazra Medica >> *Cc:* pestlist@museumpests.net >> *Subject:* Re: [pestlist] Suggestions re solutions for termite >> infestation in the tropics >> >> Key note ..... wooden items would need to have a moisture content less >> than 19% in order for bag/isolation to be faster and a total guaranteed >> success depending of the extent and species of the termites. In case other >> are thinking this may work for all situations. JTV >> >> >> >> >> >> Joel Voron Colonial Williamsburg Foundation >> >> Conservation Dept. >> >> Integrated Pest Management >> >> Office 757-220-7080 >> >> Cell 757-634-1175 >> >> E-Mail jvo...@cwf.org >> >> >> >> >> >> >> On Nov 6, 2017, at 9:06 AM, Hazra Medica <hazra.med...@ab.gov.ag> wrote: >> >> This is a message from the Museumpests.net List. >> To post to this list send it as an email to pestlist@museumpests.net >> To unsubscribe look at the footer of this email. >> ----------------------------------------------------------- >> >> Hello, >> >> >> Kindly permit me to intervene into this space to ask for safe, efficient, >> and cost-effective solutions for remedying severe termite infestations of >> artefacts and documentary heritage that are slated to become part of a >> special museum collection. We have inherited a collection of artefacts and >> documents, many of which show clear signs of termite infestation or damage >> from said infestation and which are currently still being housed in a >> building suffering severe disrepair. In an effort to curtail the spread of >> the infestation whilst the pieces are still in their unsuitable >> environment, I have taken to bagging (wrapping the wooden sculptures in >> plastic bags and sealing them with tape. I have also isolated documents in >> bags. Removal from the premises is understood as a necessary step to >> ensure the rehabilitation of these items. Also, freezing has been >> suggested as well as anoxia. Any advice you give will be greatly >> appreciated as this is very new territory for us. >> >> >> Best regards >> >> >> Hazra C. Medica >> Advisor/Consultant on Cultural Matters >> Ministry of Trade, Industry, Commerce & Consumer Affairs >> Ministry of Sports, Culture & National Festivals >> St. John's, Antigua W.I. >> >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> <REH (18).jpg> >> >> <VCBH10917.jpg> >> >> <REH (10).jpg> >> >> <VCBHPER4.jpg> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> -- >> *Alex Roach* >> *Director* >> Modified Atmospheres >> *M:* 0414 663 472 >> ABN: 66 164 577 557 >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> >> ------------------------------------------------------------- >> To unsubscribe from this list send an email to >> imail...@museumpests.net and in the body put: >> "unsubscribe pestlist" >> Any problems email l...@zaks.com >> >> >> >> > > ------------------------------------------------------------- > To unsubscribe from this list send an email to > imail...@museumpests.net and in the body put: > "unsubscribe pestlist" > Any problems email l...@zaks.com > > > > -- *Alex Roach* *Director* Modified Atmospheres *M:* 0414 663 472 ABN: 66 164 577 557 ------------------------------------------------------------- To unsubscribe from this list send an email to imail...@museumpests.net and in the body put: "unsubscribe pestlist" OR just send an email to l...@zaks.com and ask to be removed. 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