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<p>[QUOTE=&quot;Bronwen, post: 1273234, member: 5833&quot;]Especially for [USER=142]@shallow_ocean_spectre[/USER] who wondered about the glass.</p><p><br /></p><p>In ordinary light, to the unaided eye, the glass intaglio is a dull dark brown:</p><p><br /></p><p>[ATTACH=full]217468[/ATTACH] </p><p><br /></p><p>My photo editor picks up on things my eyes do not see, that the brown is really somewhat red:</p><p><br /></p><p>[ATTACH=full]217469[/ATTACH] </p><p><br /></p><p>Under the USB microscope &amp; the glare of its LEDs, it is different again:</p><p><br /></p><p>[ATTACH=full]217470[/ATTACH] [ATTACH=full]217471[/ATTACH] </p><p><br /></p><p>From the depths of his knowledge, Shallow raised the idea that it is frit, fritted or sintered glass, made of little glass globules heated just enough to stick to each other when pressed together.&nbsp; The granular appearance of the overage visible on one side would seem to corroborate that:</p><p><br /></p><p>[ATTACH=full]217476[/ATTACH] </p><p><br /></p><p>That highest of authorities, Wikipedia, assures me that this technique was already being used in antiquity.</p><p><br /></p><p>Doesn&#039;t &#039;frit&#039; sound like what butterfries do?&nbsp; And not just the fritillaries.&nbsp; <img src="styles/default/xenforo/smilies/rolleyes.png" class="mceSmilie" alt=":rolleyes:" unselectable="on" />[/QUOTE]</p><p><br /></p>

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