From: Nuno Reis (
Date: Sun Feb 11 2001 - 21:10:54 EET

It's done by a modified version of freeze casting. In this case the
investment slurry is alcohol based and refrigerated to avoid melting. The
invested ice pattern is then freeze dried (below zero centigrade) to impart
rigidity to the shell and the ice melts out at room temperature afterwards.

  -----Original Message-----
  From: []On Behalf Of
  Sent: Sunday, February 11, 2001 4:01 PM
  To: Rapid Prototyping List
  Subject: RFP

  Dear RFP knowledgeable,

  Pardon my curiosty; especially if the process is proprietary!
  But, how is it that the shell can be developed around the Ice model
before it melts??
  There must be a special process involved?

  - Jim Pike

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