Re: chocolates

From: Glyn Churchman (
Date: Sat Mar 25 2000 - 23:11:03 EET

Once fully cured, many addition cure (platinum based catalyst) RTV silicone
systems are safe enough for use with food. They are pretty much inert at this
point. There are some RTV silicones that are FDA approved (as well as some
urethane elastomers) but they can be very pricey if they have this approval.
Mainly, there are trace amounts of impurities in most non-approved silicones.

Do not use condensation cure (or Tin based catalyst) types of silicone systems,
as they continue to cure and give off components (alcohol, for one) for a very
long time. I think there is information in section 126 of the Code of Federal
Regulations for FDA requirements on silicones.

Glyn@Prototech, Inc. wrote:

> Jorge,
> It looks like you used the DOW Scholastic J silicone. I'm wondering what
> the health hazards are using this material or has it been deemed food grade?
> We had a discussion about this a couple of years ago as Marshal Burns
> pointed out and unless something has changed I think that the NON-food grade
> silicones out-gas for some time after final cure. It seems to me that this
> would cause your chocolate to taste a bit like silicone and possibly be bad
> for you.
> Just some thoughts on the cautious side!
> Karl
> -----Original Message-----
> From: Jorge Baquero []
> Sent: Thursday, March 23, 2000 3:22 PM
> To: 'Marshall Burns'; Eifert, Dan; 'Robin Stoddart';
> Subject: chocolates
> Dear List,
> Recently I experimented making chocolates with organic shapes using
> the
> FreeForm modeling system. I printed a thermojet master from the STL
> file,
> made a silicone production mold out of it and casted the chocolate
> inside.
> In the future I plan to make a thermoform mold instead of the
> silicone. You
> can see the pictures of the process at:
> Jorge
> Product Quality Specialist
> Sensable Technologies
> -----Original Message-----
> From: Marshall Burns []
> Sent: Tuesday, March 21, 2000 11:30 AM
> To: Eifert, Dan; 'Robin Stoddart';
> Subject: Fabbing chocolate
> > I've been listening to this list for the past 10 months and
> > someone has REALLY hit on a practical use for this technology!
> > Custom chocolate sculptures!
> Dan,
> A little over a year ago, there was an extensive debate on the
> about fabbing chocolate sculputes and other edible applications. See
> for a collection of the
> messages
> on this subject.
> Best regards,
> Marshall Burns
> President, Ennex Corporation
> Los Angeles, USA, (310) 397-1314
> For more information about the rp-ml, see
> For more information about the rp-ml, see
> For more information about the rp-ml, see

For more information about the rp-ml, see

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