Re: [APD] Re: ah supply reflectors

[Wright Huntley <whuntley at verizon_net>]

> Message: 8 Date: Thu, 10 Feb 2005 09:08:41 -0500 (EST) From: "Richard
> J. Sexton" <richard at aquaria_net> Subject: Re: [APD] Re: ah supply
> reflectors To: aquatic plants digest <aquatic-plants at actwin_com>
>
> At 08:30 PM 2/9/2005 -0800, you wrote:
>
>> Thank you!!  That really looks promising.  The shipping cost will
>> be much more than the cost of a foot of the mylar, but it might
>> still be reasonable.  I understand you can glue mylar with ordinary
>> Elmer's white glue too.
>
>
> I'd use urethane glue. White glue gets too hard and brittle.
>

I'll second that. I think Elmer's is a casein glue that works well only
on porous substances, like wood. If the sheet doesn't come with an 
adhesive backing, use a waterproof glue that doesn't require a solvent 
to evaporate. [It won't, through mylar.]

BTW, there's a huge difference between aluminized mylar (99% of it) and 
silvered mylar. It is the metal that counts, not the mylar substrate. 
The price may give you a clue. The silver tarnishes quickly if not 
sealed, so that product is much, much more expensive to make, for a 
10-12% increase in reflectivity. Look for at least 95% guaranteed.

Wright

--
Wright Huntley - Rt. 001 Box K36, Bishop CA 93514 - whuntley at verizon_net
                      760 872-3995

...frontier society offered 'the most civilized type of association'
because it had 'the absolute minimum of external regulation' and
therefore 'the maximum of voluntary civility and morality.'
      ------ Isabel Paterson

               http://www.libertarianism.com/

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