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<p>[QUOTE=&quot;Bronwen, post: 9616958, member: 5833&quot;]Something in the glaze reacts to UV.&nbsp; Ordinary white printer paper looks like this under UV.&nbsp; So do some diamonds.&nbsp; Not sure the effect qualifies as fluorescence, which means a material emits light it has absorbed, as opposed to light it reflects. There&#039;s an experiment to do: take the reactive material into a closet or other dark space, shine UV on it for a while, then see if it still glows when the UV is turned off.[/QUOTE]</p><p><br /></p>

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