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	<title>Incompatible - Revision history</title>
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	<updated>2026-09-10T05:30:35Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://www.frit-happens.co.uk/w/index.php?title=Incompatible&amp;diff=357&amp;oldid=prev</id>
		<title>Saffie: New page: Different glasses have different CoE e.g. Bullseye and Effetre. When these glasses are heated up and then allowed to cool the outside of the glass cools quicker than the inside...</title>
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		<updated>2008-11-14T19:44:25Z</updated>

		<summary type="html">&lt;p&gt;New page: Different glasses have different &lt;a href=&quot;/wiki/CoE&quot; class=&quot;mw-redirect&quot; title=&quot;CoE&quot;&gt;CoE&lt;/a&gt; e.g. &lt;a href=&quot;/wiki/Bullseye&quot; title=&quot;Bullseye&quot;&gt;Bullseye&lt;/a&gt; and &lt;a href=&quot;/wiki/Effetre&quot; title=&quot;Effetre&quot;&gt;Effetre&lt;/a&gt;. When these glasses are heated up and then allowed to cool the outside of the glass cools quicker than the inside...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Different glasses have different [[CoE]] e.g. [[Bullseye]] and [[Effetre]]. When these glasses are heated up and then allowed to cool the outside of the glass cools quicker than the inside. This is what leads to glass cracking and the failure of the bead. If you use 2 different glasses that have different rates of expansion then this proces is magnified and the incompatability will definitely lead to the demise of the bead!&lt;/div&gt;</summary>
		<author><name>Saffie</name></author>
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