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  • 1.  Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-22-2024 14:28

    Hello, does anyone have first-hand experience treating infested furniture using low temperature/"freezing"?

    There is a great deal published on the subject of low temperature pest treatment, and the general guidelines for furniture is not to do it because of the known material properties. But so far I've only found one publication documenting low temperature furniture treatments that were actually carried out, with no specific details of the treatments.

    There are few options left for treating infested furniture now that chemical fumigation has become more highly regulated and cost prohibitive. Freezing is fast, straightforward, and doesn't use dangerous chemicals. So, I'm wondering if low temperature treatment could possibly be safely used for some types of furniture, or under strictly controlled conditions. Perhaps the risk of damage from unchecked infestation outweighs the risk of damage from low temperatures in some cases.

    I'd love to hear if you have first-hand empirical or anecdotal information freezing furniture, particularly: 

    1) was the infestation successfully eradicated

    2) did any damage result from the treatment

    I'm happy to keep all responses completely anonymous if desired. 

    With appreciation, 

    Genevieve Bieniosek



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    Genevieve Bieniosek
    Furniture Conservator
    Biltmore Estate, Asheville NC
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  • 2.  RE: Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-23-2024 09:39

    We've treated furniture to eradicate pests with low temperature successfully and with no evidence of damage to the object by carefully following protocols that are published on the MuseumPests.net site. Our challenge has been finding a freezer that is big enough and will achieve and hold required temperatures.



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    Patricia Silence
    Director of Conservation Operations
    The Colonial Williamsburg Foundation
    Williamsburg VA
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  • 3.  RE: Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-23-2024 15:24
    Genevieve,

    There are better alternatives for furniture and other objects that could
    be damaged by exposure to the cold temperatures and time necessary.
    These include Anoxic treatment (Oxygen deprivation) and Heat Treatment.
    You can find information about both on MuseumPests.net in the Solutions
    section. https://museumpests.net/solutions/

    We talk about all the options in our Introduction to Integrated Pest
    Management online course which is coming up in April.
    https://www.museumstudy.com/introduction-to-integrated-pest-management

    --
    Brad Bredehoft (he/him/his)
    CEO
    Museum Study, LLC
    www.MuseumStudy.com




  • 4.  RE: Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-29-2024 09:47

    In Europe and the U.K. there are controlled heat treatments e.g. Thermo-Lignum where the humidity is controlled while the heat is raised. I believe heat treatments without controlling for humidity are more potentially damaging than a low-temp treatment. Thermo-lignum chambers are not currently available in the U.S. I agree that anoxia would be appropriate, but anoxic treatments take longer, and require more in the way of time and materials making them less accessible to many institutions. Since Genevieve was asking specific questions about low-temperature I think it is useful to address those concerns rather than propose alternatives that may not be appropriate given the circumstances. 



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    Rachael Arenstein
    A.M. Art Conservation, LLC
    rachael@amartconservation.com
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  • 5.  RE: Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-23-2024 15:24

    Hi Genevieve, I've forward this question to members of the C2CC experts list and we should have information for you in the next few days.



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    Rebecca Smyrl
    Connecting to Collections Care Monitor
    Assistant Conservator for Special Collections
    UNC Chapel Hill Libraries
    Chapel Hill NC
    (919) 962-4250
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  • 6.  RE: Experience with low temperature treatment of furniture for pest infestation?

    Posted 02-26-2024 10:00

    Hi Genevieve,

    As one of the co-chairs of the MuseumPests Working Group I will say that the list on our website is fairly conservative but many of our participants freeze a wide range of material with no issues. The issue with freezing furniture (other than logistical i.e. size) generally are the same concerns about composite materials. For instance, would you get splitting along wood/metal joins or attachments? What happens with thin materials like veneer or inlay?, etc.  I have the largest-size medical-grade chest freezer available to provide low-temp treatments. It isn't large enough for full-size furniture, but I have frozen a wide range of materials including large wood and composite pieces and have had no damage. As Patty wrote, I follow the guidelines on museumpests.net in terms of wrapping the pieces and bringing them back up to room temperature. As far as efficacy of treatment, the success is a relationship between temperature and time. So, the size and density of the material has to be considered. Many of the MPWG participants have done experiments with dataloggers in different materials to see how long it takes to achieve the effective low temperatures necessary for a successful treatment. When talking with clients we discuss the potential risks of damage from treatment against the present risk when there is an active infestation. It sometimes helps clarify things for them.

    I'd be happy to talk more about this off-line. And our next MuseumPests Working Group meeting is March 20-22 in NYC if you are able to join us!

    Best,

    Rachael      



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    Rachael Arenstein
    A.M. Art Conservation, LLC
    rachael@amartconservation.com
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