Expert Information on UV and Glass Found!

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Posted by LizzyLuvr on January 27, 2002 at 14:54:21:

In Reply to: UV and Plexi-Glass/Glass Research posted by LizzyLuvr on January 27, 2002 at 05:57:25:

Thanks to a very nice person on this forum

Go to http://www.gekkota.com then to Listerve, then archives.

High FE glass can be special ordered. It allows UV penetration

I was looking through some old papers, and I came across these numbers,
published by William H. Gehrmann.
According to his research papers, window glass would let 78% UVA and only 5%
UVB radiation through. Plexi-glas (UV-T) would let 89% UVA and 64% UVB
through. Galvanished mesh, depending on thickness (from 0.13" to 0.5") would
let anywhere from 67-82% UVA and 71-83% UVB.

UV-T Plexi has to be replaced quite often to maintain it's effectiveness.
6mos is recommended by labs but you could probably push it to 12. A better
solution would be to only have UV-T in the path of the sun with low FE glass
or normal plexi making up the rest. Check out the manufacturer's claims
individually (require them to provide a % throughput for the thickness you
plan to use at a baseline of the UVB you care about) as not all UV-T is
created equal.

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: Thanks to a very nice person on this forum : Go to http://www.gekkota.com then to Listerve, then archives. : : High FE glass can be special ordered. It allows UV penetration : I was looking through some old papers, and I came across these numbers, : published by William H. Gehrmann. : According to his research papers, window glass would let 78% UVA and only 5% : UVB radiation through. Plexi-glas (UV-T) would let 89% UVA and 64% UVB : through. Galvanished mesh, depending on thickness (from 0.13" to 0.5") would : let anywhere from 67-82% UVA and 71-83% UVB. : UV-T Plexi has to be replaced quite often to maintain it's effectiveness. : 6mos is recommended by labs but you could probably push it to 12. A better : solution would be to only have UV-T in the path of the sun with low FE glass : or normal plexi making up the rest. Check out the manufacturer's claims : individually (require them to provide a % throughput for the thickness you : plan to use at a baseline of the UVB you care about) as not all UV-T is : created equal.

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