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<p>[QUOTE=&quot;moreotherstuff, post: 9780174, member: 56&quot;]I would guess the glaze is crazed.&nbsp; That&#039;s when there are cracks in the glaze, but not in the underlying ceramic.&nbsp; Crazing can be difficult to see, but should show up in strong light with a critical examination.&nbsp; Crazing will give liquids access to the ceramic, and if it is at all porous, the lines will appear when water is absorbed and disappear when it evaporates.&nbsp; With time, crazing will become increasingly apparent as impurities in whatever the liquid is don&#039;t evaporate; but simply remain behind and accumulate.&nbsp; Heat causes expansion, which makes it even easier for a liquid to get through.[/QUOTE]</p><p><br /></p>

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