Found this, Helen:
Quote:
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Silverfish found in books and documents can be killed by exposure to microwave radiation. Olkowski et al. (1991) recommend placing books in a microwave oven for a period of 30 to 60 seconds to kill silverfish. Caution should be used with books or documents containing color plates or in fragile condition.
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I never cease to be amazed at what you can find on the 'Net.
BTW - I assume the caution about "color plates" might have to do with the fact that there might be metals in the inks - so keep a close eye out if you do this!