Additional to ceramic knives (main producer: Kyocera) this tool may be 
helpful:

https://www.preservationequipment.com/Catalogue/Equipment-Tools/Knives-and-Cutters/Thermocutter-Foam-Cutter-220240-voltage-P020-PTC20

Christian

Am 08.02.2019 um 01:04 schrieb Voeks, Gretchen:
> I don't have recommendations for the hot wire foam cutter, but wanted 
> to let you know that ceramic knives cut ethafoam like butter.  They 
> are very handy for creating cavity packs and other types of mounts.
>
> On Wed, Feb 6, 2019 at 6:42 AM Simons, Michael [US] (MS)(Contr) 
> <[log in to unmask] <mailto:[log in to unmask]>> wrote:
>
>     We are going to be cavity packing a large number of hands-on
>     demos.  Need a hot wire foam cutter that will hold up to repeated
>     use.  Any recommendations?
>
>     Mike
>
>     Michael Aurele Simons
>     Director
>     National Electronics Museum
>     1745 West Nursery Road
>     Linthicum, Maryland
>     410-765-3803
>     www.nationalelectronicsmuseum.org
>     <http://www.nationalelectronicsmuseum.org>
>
>
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>
> -- 
> Gretchen Voeks
> Museum Curator, Scotty's Castle
> Death Valley National Park
> PO Box 579
> Death Valley, CA  92328
> (760) 786-3258
> Mon-Thurs 7am - 5pm
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