More information from our Senior Conservation Scientist... All paintings and painted surfaces whether oil, alkyd or acrylic are at extreme risk if exposed to freezing. See the attachment. Please also see Determining the Acceptable Ranges of Relative Humidity And Temperature in Museums and Galleries. Part 2, Structural Response to Temperature at http://www.si.edu/mci/downloads/reports/Mecklenburg-Part2-Temp.pdf Best wishes, Ann N'Gadi Technical Information Specialist MCI -----Original Message----- From: Museum discussion list [mailto:[log in to unmask]] On Behalf Of George Harris Sent: Wednesday, December 19, 2007 8:39 AM To: [log in to unmask] Subject: [MUSEUM-L] Building Freeze Hello, The collections manager at my museum thought that when we have our furnace replaced early next year that it might be a good time to let the building freeze to try and kill any pests that are in the collections. I think it is not now going to happen, but some responses she got from a posting on a different listserv said that it wouldn't hurt the collections to have them be frozen. This is completely wrong for some types of collections, of course. Are there any resources that anyone can suggest that show how tempreature changes alone and tempreature in cunjunction with its relationship with relative humidity can damage collections? Thank you. Beau ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes). ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).