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<p>[QUOTE=&quot;Cherryhill, post: 4139457, member: 70&quot;]I&#039;m no expert on the effects of UV light on glass constituents, but I have picked up a few tips. Lime, large component of soda lime glass will give a light blue-green tinge to it. This is not often easily seen. It often seems to be a reflection, but its not. High lead content, over 20% may reflect as if it were a mirror. Either Cadmium or Selenium, or both will glow orange. The inclusion of iron in glass will give it a rusty color. Think Amber. I&#039;m not aware of any UV reaction to iron. Manganese, Hmm. its so common in everyday glass that if it were reactive almost all glass would react somehow.</p><p><br /></p><p>Uranium glass with copper sulfate (to turn the yellow to green) is in the vase above. Copper sulfate was used to make glass blue. We al know that yellow and blue make green. </p><p>Observations of a student. I left out uranium, it&#039;s been talked to death.[/QUOTE]</p><p><br /></p>

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