Todd – I agree that the Mitsubishi versions don’t keep the RH perfectly stabile and that adding silica can be useful. I assume I’ll be corrected on this forum, but my understanding of anoxic treatments is that the insects die from dehydration (vesicles open looking for oxygen and they dry out in that process), so lower humidity, presumably, will stress them/dry them more quickly.
Eric From: pestlist@googlegroups.com <pestlist@googlegroups.com> On Behalf Of Todd Holmberg Sent: Thursday, June 27, 2024 1:58 PM To: pestlist@googlegroups.com Subject: Re: [External] - [PestList] Anoxic Treatment Protocols Eric- Thanks! It's interesting because according to our HOBO, there was a pretty significant gradual increase in RH over the course of the treatment even though we were using the Mitzubishi brand eaters (approx 5% rise over 21 days). I put silica gel in the envelope that was conditioned at "50%". The RH rise has me thinking about trying 40-45% gel for future treatments to try and keep it further away from flirting with the dreaded "60% line". Thanks- Todd On Thu, Jun 27, 2024 at 12:46 PM Breitung, Eric <eric.breit...@metmuseum.org<mailto:eric.breit...@metmuseum.org>> wrote: Those look more like meat sticks than oxygen absorbers. Just kidding…I believe the Mitsubishi absorbers also claim to control humidity in the package. Unclear whether the ULINE product is doing the same, but maintaining humidity is often important for sensitive cultural heritage material stability. Eric From: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> On Behalf Of Todd Holmberg Sent: Thursday, June 27, 2024 1:42 PM To: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> Subject: [External] - [PestList] Anoxic Treatment Protocols Hello Pest list- I am curious if anyone has used these oxygen absorbers from ULINE for anoxic treatments: https://www.uline.com/BL_288/Oxygen-Absorbing-Packets The ones we have used in the past were from Mitsubishi. We have an account with Uline, so ordering these would be a little more convenient. I wasn't sure if there were differences between absorbers and if there would be a reason to be cautious about using "any packet that is an oxygen absorber". According to MuseumPest.net: * Care must be taken to select the proper oxygen scavenger. Some oxygen scavengers contain an added desiccant (e.g. RP Type A), which could decrease the equilibrium Also, when considering performing an anoxic treatment on an "oil on canvas" painting, are there other critical concerns other than prussian blue? The general specs of the treatment will be: -In a Marvelseal envelope with oxygen eaters -Flushed with nitrogen gas -Temp around 70 F (room temp) -RH in the 50%'s -Duration 21 days If anyone has insight into these Uline absorbers, or thoughts about the specs above, I would be grateful to hear what your thoughts are. 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 pestlist+unsubscr...@googlegroups.com<mailto:pestlist+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAMxAh%2Bi4MPoB8skhM7NO8%3Duk1ZDnQzKqr%3DO9_zSUTsps8zdVFw%40mail.gmail.com<https://groups.google.com/d/msgid/pestlist/CAMxAh%2Bi4MPoB8skhM7NO8%3Duk1ZDnQzKqr%3DO9_zSUTsps8zdVFw%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- 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 pestlist+unsubscr...@googlegroups.com<mailto:pestlist+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/DS0PR05MB9221978215CC801C91B8C893E3D72%40DS0PR05MB9221.namprd05.prod.outlook.com<https://groups.google.com/d/msgid/pestlist/DS0PR05MB9221978215CC801C91B8C893E3D72%40DS0PR05MB9221.namprd05.prod.outlook.com?utm_medium=email&utm_source=footer>. -- 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 pestlist+unsubscr...@googlegroups.com<mailto:pestlist+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAMxAh%2BjDUuTcdjY0garUGK5G0BPi2kvvQ4gfo-%2Bb4r4gVJzj0g%40mail.gmail.com<https://groups.google.com/d/msgid/pestlist/CAMxAh%2BjDUuTcdjY0garUGK5G0BPi2kvvQ4gfo-%2Bb4r4gVJzj0g%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- 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 pestlist+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/DS0PR05MB9221BF110970AB1CEEA343DEE3D72%40DS0PR05MB9221.namprd05.prod.outlook.com.
