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42754Re: [hobbicast] Need advice

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  • Yvanwolvesbane
    Apr 10, 2013
      Hey there, folks-
      PoP I'm familiar with. This is the first time I've heard of American Plaster. Is it known by other names? What makes it different from PoP?

      Mark Feldmann/
      Yvan Wolvesbane

      Pacifist with occasional lapses


      On Apr 10, 2013, at 9:52 AM, Dan Brewer <danqualman@...> wrote:

      > On of the problems with using POP is that it is hygroscopic meaning that
      > the material will never release all of the water trapped in its structure.
      > It actually will draw water out of the atmosphere . I would use a material
      > that when fired will vitrify and change to a substance that now will reject
      > water. American plaster makes casting plaster. 50 lbs goes for about
      > 20USD . There are several others. Plaster of Paris is best left to the
      > art casting for statues.
      >
      > Dan in Auburn
      >
      >
      > On Tue, Apr 9, 2013 at 10:07 PM, Eggleston Lance <wheezer606@...>wrote:
      >
      >> **
      >>
      >>
      >> OK, will dry 400-700 F.
      >>
      >> Would it work better to fill from the bottom and
      >> vent at the top ?
      >>
      >> lance
      >> ++++
      >>
      >> On Apr 9, 2013, at 10:19 PM, Jeshua Lacock wrote:
      >>
      >>> Sounds like the POP had far too much water in it still.
      >>>
      >>> I would dry it out more around 400F. When I do lost plastic casting (a
      >> bit different of course) I heat the POP mold up to around 1000F...
      >>
      >> [Non-text portions of this message have been removed]
      >>
      >>
      >>
      >
      >
      > [Non-text portions of this message have been removed]
      >
      >
      >
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