>From what i read polycarbonate is filtering out UV and PMMA is
>passing everything straight through. I may be misinformed though.
Either can be formulated to block UV.
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Tuffak® XL Weatherable Polycarbonate Sheet
Tuffak® XL has a "built-in" UV barrier and is 100% polycarbonate.
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Plexiglas® UF-3, UF-4 and UF-5 Acrylic
Some applications, such as document and fine art preservation, call
for a material that absorbs more ultraviolet (UV) energy than
ordinary glass without absorbing visible light.
Plexiglas® G UF-3 and Plexiglas® MC UF-5 standard and non-glare
acrylic sheet finishes filter out up to 99% of all UV rays, as well
as some visible light
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--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>