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Black Crystal

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Posted by Jeff on June 29, 2006, 11:55 am
Who knows about this:

<URL: http://www.solgels.com/BCinfo.htm  >

It's news to me... It looks like a better/cheaper alternative to Black

I'm having a hard enough time finding twinwall polycarbonate (SunLite)!

BTW, visted these folks:
<URL: http://southface.org/  >

Amazing how little interest they had in thermal solar, though I did get
a tip on where to find broken PV pieces! I'm constantly amazed at how
much more interest there is in PV over thermal.


Posted by nicksanspam on June 29, 2006, 1:18 pm


I wonder if it's weatherable.

You might try a greenhouse supplier. Thermaglas Plus is OK, with US U0.58
and 80% solar transmission. Degusa Alltop acrylic is better, but it seems
to be quite pricy in the US after packaging and transport from Germany.


Posted by Tamar on June 30, 2006, 12:15 am
 I agree! People need to invest more in solar thermal - the problem is
the huge incentive that exists (in NY at least) for PV but not for
solar thermal.

Jeff wrote:

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