Case making clothes moths may be killed by freezing, however, How the freezing is done is important. 1. Clean the item - gently brush off casings and frass. Get ALL of it. 2. Bag the item - isolate it in a sealed microenvironment. In English, this means put it in a thick clear plastic and tape it up. Write the date on the outside of the bag. 3. Freeze it for a week. 4. Thaw it overnight but do not take it out of the bag. 5. Check for ANY evidence of renewed infestation. If you find any - repeat from step 1. 6. After all evidence is gone, leave it bagged for a month, check and resume treatment is necessary. There are three issues here. When you freeze the item, you kill all the larvae, but do not kill the eggs. By thawing it, you stimulate the eggs to hatch and start the cycle over. You have to repeat the treatment until all the viable eggs have hatched. Secondly, some critters can survive slight freezing through a means described to me as converting some body fluids to glycol. I'm no entymologist, I don't know. I do know case making clothes moths are tough. Finally, bagging the infestation ensures it does not spread. Clear plastic will allow you to check the item wile still bagged. We successfully used this programme to treat infestations in collections in the Northwest Territories for years. You don't need extreme temperatures, but at least -20 C. should work. ______________________________________________________ Barbara J. Winter tel: (604) 291-3325 Department of Archaeology fax: (604) 291-5666 Simon Fraser University email: [log in to unmask] Canada V5A 1S6 Another damned, thick, square book! Always scribble, scribble, scribble! Eh! Mr. Gibbon? -- William Henry, Duke of Gloucester, upon receiving from Edward Gibbon volume II of The Decline and Fall of the Roman Empire (1781).