You can reference the CCI notes on freezing. It gives the duration of freezing for insect control needed at various temperatures. https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes/controlling-insects-low-temperature.html
Best, Malia Malia Van Heukelem Art Archivist Librarian Jean Charlot Collection <http://manoa.hawaii.edu/library/research/collections/charlot-collection/> University of Hawaii at Manoa 808-956-2849 On Wed, Dec 12, 2018 at 1:09 PM artsroundhill <[email protected]> wrote: > That is good to know about the results of a book trial, but there are many > much less dense, thin or lightweight, things that get frozen which could > easily warm up during a defrost cycle. I would love to see data from a > logger inside a package with a feather diadem for instance. > Linda > > On Wed, Dec 12, 2018, 3:01 PM 'bugman22' via Museumpests < > [email protected] wrote: > >> I agree totally with Alan. If anything, the defrost cycles stress the >> critters even more. Go for it. >> >> Tom Parker >> >> >> -----Original Message----- >> From: Alan P Van Dyke <[email protected]> >> To: pestlist <[email protected]> >> Sent: Wed, Dec 12, 2018 5:32 pm >> Subject: Re: [pestlist] Freezer Temp Question >> >> Our freezer does the same thing, and we haven't noticed any affect on >> treatment. Items in the freezer will hold their temperature pretty well >> during those short spikes - it's mostly the air temp that is affected. >> >> My predecessor hollowed out a paperback dictionary just enough to >> accommodate a thermometer so we could monitor how stable the temperature of >> the inside of a book is. We were pretty impressed how little it moved once >> down to temperature. >> >> Alan >> >> >> *Alan Van Dyke* >> Senior Preservation Technician >> Harry Ransom Center >> The University of Texas at Austin >> P.O. Drawer 7219 >> Austin, TX 78713-7219 >> P: 512-232-4614 >> www.hrc.utexas.edu >> >> >> On Wed, Dec 12, 2018 at 4:22 PM Todd Holmberg <[email protected]> >> wrote: >> >> Hello Pestlist, >> >> I have a question related to freezing treatment temperatures. >> >> At the museum I work at, we recently put a data logger in our freezer. >> We took the readout this morning, and now have our first chart showing the >> temperature conditions inside over the course of a full 7-day week. >> Something came up on the readout that I wanted to run past this group and >> see if anyone had any opinions on it. >> >> The "base/normal" temp in the freezer is -28 F, and it holds that pretty >> steady. There were 8 temp spikes though. The doors remained shut the >> entire week, and my guess is the spikes are related to a defrost cycle. >> The spikes were all virtually identical and lasted 55 minutes. The temp >> went from -28 to -14, then back to -28, with about 20-25 minutes of temps >> warmer than -22 (I have heard -22 F is a significant temp relating >> to freezing effectiveness- is that true?). >> >> Does anyone have an opinion on whether or not spikes where >> the temp rises between -22 F and -14 F for 20-25 minutes would have a >> significant affect on a freezing treatment? My guess is there will be >> approx. 10 of these spikes per week, but we will see about that as >> more weekly charts come in. >> >> If anyone has an opinion or thoughts they would be appreciated. >> >> Thanks, >> Todd >> -- >> You received this message because you are subscribed to the Google Groups >> "Museumpests" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/pestlist. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pestlist/CAMxAh%2Bi_c%3DmzW1kaQd1Om3iPPsQTbh-X%2B-4i2Cc018dYrPFQ%3Dw%40mail.gmail.com >> <https://groups.google.com/d/msgid/pestlist/CAMxAh%2Bi_c%3DmzW1kaQd1Om3iPPsQTbh-X%2B-4i2Cc018dYrPFQ%3Dw%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Museumpests" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/pestlist. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pestlist/CAHhLO3YKJ0wuDF4APj%2BVu71F3GXj8OuGrvoZsZg-o4tcXJJ1AQ%40mail.gmail.com >> <https://groups.google.com/d/msgid/pestlist/CAHhLO3YKJ0wuDF4APj%2BVu71F3GXj8OuGrvoZsZg-o4tcXJJ1AQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Museumpests" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/pestlist. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pestlist/415028324.3380274.1544655683001%40mail.yahoo.com >> <https://groups.google.com/d/msgid/pestlist/415028324.3380274.1544655683001%40mail.yahoo.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "Museumpests" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/pestlist. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pestlist/CAL5sHxcpn3Shu-kqkk_DLNyOA_pBqK2hdVDjeCuMU%3DcWYMhRgQ%40mail.gmail.com > <https://groups.google.com/d/msgid/pestlist/CAL5sHxcpn3Shu-kqkk_DLNyOA_pBqK2hdVDjeCuMU%3DcWYMhRgQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/pestlist. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CA%2BtTSLM0qzvj9B3uGgqLnnOC1oHur_5pSuT9UXPpYUThSZQi7A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
