smittenbyu: (0)
smittenbyu ([personal profile] smittenbyu) wrote 2007-12-20 11:58 pm (UTC)

i thought of that also and found that not all rays are blocked. I think UVB is blocked but not UVA (or the other way around). Also it depends on the glass I think...if it's treated to be a protection layer or not...
(2 comments)

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