QuickCast and Swelling

From: Tony Riek (Queensland Manufacturing Institute)
To: RP-ML
Date: Monday, June 19, 1995
Subject: QuickCast and Swelling
Dear Rp'ers

We are in the process of building a number of QuickCast parts (v1.1) and we 
are noticing *significant* swelling of large flat surfaces (vertical and/or
horizontal 
surfaces).  

This swelling occurs somewhere in postprocessing, and looks exactly like
we have tried to inflate the part by applying positive internal air
pressure.  (No, we
do not use this technique to check for air holes or to expel trapped resin.)

We are using no water in postprocessing.  We sometimes use a *little*
98%ethanol to 
clean up.  Mostly we just use plain paper towels.

Anybody else having such problems??
Anybody know a solution??

Thanks

Tony Riek
CSIRO - Division of Manufacturing Technology
Queensland Manufacturing Institute
P.O.Box 4012, Eight Mile Plains, Brisbane Q 4113
Ph: + 61 7 847 0777  Fax: + 61 7 847 0711
E-mail:  ttr@brb.dmt.csiro.au