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(75 votes) Published: Mar 07, 2007 7:10 a.m. In 1 Favorites Lists Viewed 251 times
MATERIALS:
-Plaster of paris (check a hardware store)
-graphite (the "lead" in pencils)
-calcium silicate A.K.A. water glass (i took mine from school, but you could try looking at a chemistry supply store)
-Perlite (sold at garden centers)
Directions:
1. finely powder the graphite,perlite, and, if necessary, the sodium silicate.
2.mix 6 parts plaster of paris, 1/2 part graphite, 2 parts perlite, and 1 part sodium silicate
3. add water until it is the consistancy of pancake or waffle batter
4. pour the material into a disposable plastic container, i used an old butter container, and let it set for about 2 days (it may take longer)
5. when the material is dry, cut off the container and remove the mold.
6. put the mold in the oven at its highest setting for about 6 hours (this removes any pockets of water that could flash to steam and cause the mold to explode)
now your done, my plaster stood up to the heat of a propane torch without any adverse effects, i think it could probably handle alot more, but i have no means to test it.
Mar 07, 2007 9:29 am - i made this as a platform to put things on while i heated them (i was trying to find out what color flames various things make for a firework) and before i made this i just heated things on the floor of my garage, but the cement (like all cement) had pockets of water in it which flashed to steam and made a small portion of the floor explode and sent little pieces of cement everywhere. with the plaster, i dont have to worry about the floor (and possibly me) getting damaged
Mar 07, 2007 10:16 pm - your esentialy making flame resistant ceramic which is neddless to say, redundant. plain old plaster will withstand pretty much anything you can get your hands on. thats the same shit they use on the shuttle.
Mar 09, 2007 3:34 pm - AWESOME This is flippin sweet if you actually THINK of what you could do with it. its flame resistant, that means its resistant against flames. so make a thick mold of this for your hand/arm then cover the completed cast with napalm or roofing tar then you could harmlessly light up your hand/arm! I havent tried this yet but theoretically it should work....at least for a bit until either the cast melts (or somethin like that) or the fire goes out.
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