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Sculpey strength?



 
 
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  #11  
Old August 27th 04, 01:23 AM
Helen Halla Fleischer
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| On Thu, 26 Aug 2004 23:49:05 GMT, "Jason" wrote:

Well I tried baking three pieces 1/4" think for reference. All the pieces
came out semi-hard after 20min and hardened a bit more after cooling but are
not brittle. It is hard enough for the purpose I need but the biggest
disappointment is that the color changed a lot. It started as white but is
now beige with dark splotches here and there. One was baked at 265F, one at
275F, and the third at 300F all for 20 min and all look the same. I have a
very old oven though and I suspect that is the culprit, is what I described
a product of over-baking or charring? Also I was under the impression that
it would be brittle like glass, instead it is like very hard rubber. Like I
said that will work but is that how it is supposed to be? I may take a trip
to a local thrift store this weekend in search of a toaster oven to test it
in.

Thanks


See my other post about oven thermometers and foil tenting. Sometimes
discoloration just happens and can't be avoided with plain Sculpey. Then it
makes sense to just paint it. A coat of white acrylic gesso applied without
thinning makes a good base and being white may be all you need.

Helen "Halla" Fleischer, Fantasy & Fiber Artist
http://home.covad.net/~drgandalf/halla/
Balticon Art Program Coordinator http://www.balticon.org
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  #12  
Old August 27th 04, 01:26 AM
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See my other post about oven thermometers and foil tenting. Sometimes
discoloration just happens and can't be avoided with plain Sculpey. Then

it
makes sense to just paint it. A coat of white acrylic gesso applied

without
thinning makes a good base and being white may be all you need.

Helen "Halla" Fleischer, Fantasy & Fiber Artist
http://home.covad.net/~drgandalf/halla/
Balticon Art Program Coordinator http://www.balticon.org


Thank you for all your insight, it's appreciated.


  #13  
Old August 27th 04, 04:05 AM
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An oven thermometer is a very worthwhile investment. It also helps to line
the tray with cardboard and tent foil over the work. Rubbery is better

than
brittle, but brown splotches mean too much heat.

Helen "Halla" Fleischer, Fantasy & Fiber Artist
http://home.covad.net/~drgandalf/halla/
Balticon Art Program Coordinator http://www.balticon.org


Thanks. I just tried a fourth piece using cardboard on the tray and foil
over top. I also turned the stove down 25 degrees and the result was the
same very hard rubber firmness and almost exactly the same color as when I
put it in.


  #14  
Old August 27th 04, 11:40 PM
Helen Halla Fleischer
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| On Fri, 27 Aug 2004 03:05:38 GMT, "Jason" wrote:

An oven thermometer is a very worthwhile investment. It also helps to line
the tray with cardboard and tent foil over the work. Rubbery is better

than
brittle, but brown splotches mean too much heat.

Thanks. I just tried a fourth piece using cardboard on the tray and foil
over top. I also turned the stove down 25 degrees and the result was the
same very hard rubber firmness and almost exactly the same color as when I
put it in.

That sounds a good result then. This is vinyl we're working with, so it's
always going to be a bit rubbery. Brittle is a relative term with this
stuff.


Helen "Halla" Fleischer, Fantasy & Fiber Artist
http://home.covad.net/~drgandalf/halla/
Balticon Art Program Coordinator http://www.balticon.org
 




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