Re: IR UV and other nasty stuff!

[P3D Dr. George A. Themelis <fj834@xxxxxxxxxxxxxxxxxxxxx>]

I asked:
>>Which portion of the radiation spectrum causes fading in slides?

And Gabriel in his own cute way replied:
>Cross you eyes for the answer.  (UV)

This raises more questions:  How much UV is going through the glass lenses?
Is it true that a simple piece of glass blocks UV?  If yes, should an extra
piece of glass before the slide protect the slide from fading?  Are halogen
quartz bulbs more damaging to slides than regular glass tungsten bulbs?

I suspect that the answer is not that simple. -- George


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